Amada CD-A Series User manual

990-430 Rev C
STORED ENERGY POWER SUPPLY
CD-A
OPERATION MANUAL

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
ii 990-430
Copyright © 2019 - 2020 Amada Weld Tech
The engineering designs, drawings and data contained herein are the proprietary work of
Amada Weld Tech and may not be reproduced, copied, exhibited or otherwise used
without the written authorization of Amada Weld Tech.
Printed in the United States of America.
Revision Record
Revision EO Date Basis of Revision
A 45534 07/19 Original edition
B 45659 10/19 Model Number change + update weld parameters
C
45833
04/20
Update Company Name (Amada Weld Tech)
The following CD-A Dual Pulse Resistance Welders are available:
CD-A125A –125WS
CD-A300A –300WS
CD-A1000A –1000WS
Your New Welder Shipment Contains The Following Items:
1. The CD-A Control Unit (Power Supply)
2. User manual # 990-430
3. Ship Kit # 4-81249-01
4. External current coil (CD-A1000A only)
NOTE: The CD-A1000A will also have an external transformer shipped on a separate pallet.
Ship Kit Contents
Ship Kit Part Number 4-81249-01
Amada Weld Tech
Part Number
Description Quantity
205-133 CE Power Cord, 115 VAC 1
245-162 Backshell, 37 pin D-sub 1
250-409 D-sub, 37 pin connector 1
4-41258-01 USB Assembly, CD-A Manuals 1

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 iii
CONTENTS
Revision Record ......................................................................................................................................... ii
Contact Us .............................................................................................................................................. vi
Safety Notes ............................................................................................................................................. vii
Limited Warranty.........................................................................................................................................x
Chapter 1. Description
Section I: Features ..................................................................................................................................1-1
Features ............................................................................................................................................1-1
Display Screens ...............................................................................................................................1-2
Description .......................................................................................................................................1-4
Section II: Major Components ...............................................................................................................1-5
Major Components ..........................................................................................................................1-5
Front Panel Controls ........................................................................................................................1-5
UP/DOWN Buttons ..................................................................................................................1-6
Polarity Select ........................................................................................................................... 1-6
Pulse Select ...............................................................................................................................1-6
RUN ..........................................................................................................................................1-6
MENU ......................................................................................................................................1-6
LIMITS / COUNTERS .............................................................................................................1-7
Pulse 1 & Pulse 2 ......................................................................................................................1-7
SQZ / HOLD ............................................................................................................................1-7
SAVE ........................................................................................................................................1-7
CLEAR .....................................................................................................................................1-7
CHARGE MONITOR Light ....................................................................................................1-7
WELD/NO WELD Switch .......................................................................................................1-7
Emergency Stop Switch Operation ..................................................................................................1-8
Chapter 2. Installation and Setup
Section I: Installation .............................................................................................................................2-1
Unpacking ........................................................................................................................................2-1
Space Requirements .........................................................................................................................2-1
Utilities ............................................................................................................................................2-2
Power Input Specifications .......................................................................................................2-2
Compressed Air and Cooling Water .........................................................................................2-2
Input Logic Configuration ...............................................................................................................2-2
Section II. CD-A125A & CD-A300A External Equipment Connections .............................................2-3
Emergency Stop Switch ........................................................................................................... 2-3
Weld Head Connections to Power Supply Terminals (non-force fired weldhead) ..................2-4
Mechanically Actuated Weld Head Connection (force fire weldhead) ....................................2-5
Pneumatic Actuated Weld Head Connection (non force fired weldhead) ...............................2-6
EZ-AIR Weld Head Connections .............................................................................................2-7
24 VDC EZ-AIR ................................................................................................................2-7
24 VAC EZ-AIR ................................................................................................................2-8

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
iv 990-430
CONTENTS (Continued) Page
Section III. CD-A1000A External Equipment Connections ................................................................2-10
Overview ........................................................................................................................................ 2-10
Connecting the CD-A1000A Transformer ....................................................................................2-11
Chapter 3. Using Display Screens
Section I: RUN Screen ........................................................................................................................... 3-1
RUN Screen .....................................................................................................................................3-1
Editing the RUN Screen ..................................................................................................................3-2
Pulse 1 ......................................................................................................................................3-2
Pulse 2 ......................................................................................................................................3-2
Squeeze Time ...........................................................................................................................3-2
Hold Time .................................................................................................................................3-3
Section II: LIMITS / COUNTERS screen .............................................................................................3-4
LIMITS / COUNTERS Screen ........................................................................................................3-4
Edit the LIMITS / COUNTERS Screen ..........................................................................................3-4
Pulse 1 – Upper Limit................................................................................................................3-4
Pulse 1 – Lower Limit...............................................................................................................3-4
Pulse 2 Limits ...........................................................................................................................3-4
Pulse 1 – Action.........................................................................................................................3-5
Reset Weld Counter .................................................................................................................. 3-5
Edit Counter Limit ....................................................................................................................3-5
Section III: MENU Screen ..................................................................................................................... 3-6
MENU Screen ..................................................................................................................................3-6
Editing the MENU Screen ...............................................................................................................3-6
Buzzer .......................................................................................................................................3-6
Baud Rate .................................................................................................................................3-7
Debounce ..................................................................................................................................3-7
Chaining Start ...........................................................................................................................3-7
Chaining End ............................................................................................................................3-8
Remote ......................................................................................................................................3-8
Language ..................................................................................................................................3-8
Reset Defaults ........................................................................................................................... 3-9
Repeat Mode .............................................................................................................................3-9
Repeat Time ............................................................................................................................3-10
Weld Mode .............................................................................................................................3-11
Chapter 4. Operating Instructions
Section I: Introduction ........................................................................................................................... 4-1
Before You Start ..............................................................................................................................4-1
Pre-Operational Checks ...................................................................................................................4-1
Connections ..............................................................................................................................4-1
Power ........................................................................................................................................4-1

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 v
CONTENTS (Continued)
Page
Compressed Air ........................................................................................................................4-1
Initial Setup ......................................................................................................................................4-2
Section II. Operation ..............................................................................................................................4-3
Start-Up ............................................................................................................................................4-3
Using Existing Weld Schedules .......................................................................................................4-3
Modifying Weld Schedules ............................................................................................................. 4-3
Set Peak Current Monitor limits ...................................................................................................... 4-4
Set Weld Counter Limit or Reset the Weld Counter. ......................................................................4-5
Set MENU Entries ...........................................................................................................................4-5
Dual Weldhead Operation ............................................................................................................... 4-6
Programming Lock ..........................................................................................................................4-6
Schedule Lock .................................................................................................................................4-6
Turning the Unit OFF ......................................................................................................................4-7
Section III: Operational Notes ...............................................................................................................4-8
Repetition Rate ................................................................................................................................4-8
Automatic Power Turn-Down .........................................................................................................4-8
Extended Shut-down Procedure ......................................................................................................4-8
Chapter 5. Maintenance
Section I. Troubleshooting .....................................................................................................................5-1
Troubleshooting ...............................................................................................................................5-1
Error Messages ................................................................................................................................5-2
Section II. Maintenance .........................................................................................................................5-4
Calibration .......................................................................................................................................5-4
Electrode Maintenance ....................................................................................................................5-4
Parts Replacement ........................................................................................................................... 5-4
Section III. Repair Service .....................................................................................................................5-5
Appendix A. Technical Specifications ................................................................................................. A-1
Appendix B. Electrical and Data Connections ......................................................................................B-1
Appendix C. System Timing ..................................................................................................................C-1
Appendix D. Communications .............................................................................................................. D-1
Appendix E. The Basics of Resistance Welding ...................................................................................E-1
Appendix F. Quality Resistance Welding Solutions: Defining the Optimum Process .........................F-1

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
vi 990-430
CONTACT US
Thank you for purchasing an Amada Weld Tech Resistance Welding System Control Unit.
Upon receipt of your equipment, please thoroughly inspect it for shipping damage prior to its installation.
Should there be any damage, please immediately contact the shipping company to file a claim, and contact
us at:
Amada Weld Tech Inc.
1820 South Myrtle Avenue
P.O. Box 5033
Monrovia, CA 91017-7133
TELEPHONE: [phone]
e-mail: [email protected]
The purpose of this manual is to provide the information required for proper and safe operation and
maintenance of the Amada Weld Tech CD-A125A, CD-A300A and CD-A1000A Dual Pulse Resistance
Welding Power Supplies.
We have made every effort to ensure that information in this manual is both accurate and adequate. If you
have any questions or suggestions to improve this manual, please contact us at the phone number or
addresses above.
Amada Weld Tech is not responsible for any loss or injury due to improper use of this product.

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 vii
SAFETY NOTES
DANGER
•DEATH ON CONTACT may result if you fail to observe all safety precautions.
Lethal voltages are present in the Power Supply.
•Never perform any welding operation without wearing protective safety glasses.
This instruction manual describes how to operate, maintain and service the CD-A125A, CD-A300A and
CD-A1000A Dual Pulse Resistance Welding Power Supplies, and provides instructions relating to its safe
use. A separate manual provides similar information for the weld head used in conjunction with the power
supply. Procedures described in these manuals must be performed, as detailed, by qualified and trained
personnel.
For safety, and to effectively take advantage of their full capabilities, please read these instruction manuals
before attempting to operate weld heads and power supplies.
Procedures other than those described in these manuals or not performed as prescribed in them, may
expose personnel to electrical shock or burn hazards.
After reading these manuals, keep them for future reference.
Please note the following conventions used in this manual:
WARNING:Comments marked this way warn the reader of conditions which might result in immediate
death or serious injury.
CAUTION:Comments marked this way warn the reader of conditions which might result in damage to
the equipment.

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
viii 990-430
Declaration of Conformity
Application of Council Directive:
2014/35/EU, 2014/30/EU, 2011/65/EU & 2006/42/EC
Standards To Which
Conformity Is
Declared:
EN62135-1:2015 (LVD) 12100:2010 (MD)
EN62135-2:2015 (EMC) 13849-1:2015 (MD)
EN55011 Cls A Grp 1 60204-1:2006+A1:2009 (MD)
EN61000-3-2
EN61000-3-3
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
EN61000-4-8
EN61000-4-11
EN50581:2012 (EU RoHS)
Manufacturer's Name: AMADA WELD TECH
Manufacturer's Address:
1820 S. Myrtle Avenue
Monrovia, CA 91016
626-303-5676
Equipment Description: CD WELDER
Equipment Class: - Insulation Class I
- Resistance Welding Equipment
Model Numbers: CD-A125A & CD-A300A
I the undersigned, hereby declare that the equipment specified above,
conforms to the above Directive(s) and Standard(s).
Place: Monrovia, CA, USA
Signature:
Full Name: Thomas Houy
Position: Mgr., Sustaining Engineering
Date: April 01, 2020

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 ix
Declaration of Conformity
Application of Council Directive:
2014/35/EU, 2014/30/EU, 2011/65/EU & 2006/42/EC
Standards To Which
Conformity Is
Declared:
EN62135-1:2015 (LVD) 12100:2010 (MD)
EN62135-2:2015 (EMC) 13849-1:2015 (MD)
EN55011 Cls A Grp 1 60204-1:2006+A1:2009 (MD)
EN61000-3-2
EN61000-3-3
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
EN61000-4-8
EN61000-4-11
EN50581:2012 (EU RoHS)
Manufacturer's Name: AMADA WELD TECH
Manufacturer's Address:
1820 S. Myrtle Avenue
Monrovia, CA 91016
626-303-5676
Equipment Description: CD WELDER
Equipment Class: - Insulation Class I
- Resistance Welding Equipment
Model Numbers: CD-A1000A
I the undersigned, hereby declare that the equipment specified above,
conforms to the above Directive(s) and Standard(s).
Place: Monrovia, CA, USA
Signature:
Full Name: Thomas Houy
Position: Mgr., Sustaining Engineering
Date: April 01, 2020

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
x 990-430
LIMITED WARRANTY
GENERAL TERMS AND CONDITIONS FOR THE SALE OF GOODS
1. Applicability.
(a) These terms and conditions of sale (these “Terms”) are the only terms which govern the sale of the goods (“Goods”) by Amada Weld Tech Inc. (“Seller”)
to the buyer identified in the Sales Quotation and/or Acknowledgment (as each defined below) to which these Terms are attached or incorporated by
reference (“Buyer”). Notwithstanding anything herein to the contrary, if a written contract signed by authorized representatives of both parties is in
existence covering the sale of the Goods covered hereby, the terms and conditions of said contract shall prevail to the extent they are inconsistent with
these Terms.
(b) The accompanying quotation of sale (the “Sales Quotation”) provided to Buyer, and/or sales order acknowledgement (“Acknowledgement”) and these
Terms (collectively, this “Agreement”) comprise the entire agreement between the parties, and supersede all prior or contemporaneous understandings,
agreements, negotiations, representations and warranties, and communications, both written and oral. For clarification, after the Acknowledgement is
received by Buyer, the order for Goods is binding and cannot be cancelled by Buyer for any reason and the full purchase price amount set forth in the
Acknowledgement shall be due and payable by Buyer to Seller pursuant to the payment schedule set forth in the Acknowledgement unless otherwise agreed
to in writing by Seller. All terms and conditions contained in any prior or contemporaneous oral or written communication which are different from, or in
addition to, the terms and conditions in this Agreement are hereby rejected and shall not be binding on Seller, whether or not they would materially alter
this Agreement. These Terms prevail over any of Buyer’s terms and conditions of purchase regardless whether or when Buyer has submitted its purchase
order or such terms. Fulfillment of Buyer’s order does not constitute acceptance of any of Buyer’s terms and conditions and does not serve to modify or
amend these Terms. Notwithstanding anything herein to the contrary, all orders for Goods must be for a minimum purchase price of $100 or such orders
will be rejected by Seller.
2. Delivery.
(a) The Goods will be delivered within a reasonable time after Seller provides Buyer the Acknowledgment, subject to availability of finished Goods. Seller
will endeavor to meet delivery schedules requested by Buyer, but in no event shall Seller incur any liability, consequential or otherwise, for any delays or
failure to deliver as a result of ceasing to manufacture any product or any Force Majeure Event. Delivery schedules set forth in the Acknowledgment are
Seller’s good faith estimate on the basis of current schedules. In no event shall Seller be liable for special or consequential damages resulting from failure
to meet requested delivery schedules.
(b) Unless otherwise agreed in writing by the parties in the Acknowledgement, Seller shall deliver the Goods to the Seller’s plant in Monrovia, CA, USA (the
“Shipping Point”) using Seller’s standard methods for packaging and shipping such Goods. Buyer shall take delivery of the Goods within three (3) days of
Seller’s written notice that the Goods have been delivered to the Shipping Point. Buyer shall be responsible for all loading costs (including freight and
insurance costs) and provide equipment and labor reasonably suited for receipt of the Goods at the Shipping Point. Seller shall not be liable for any delays,
loss or damage in transit.
(c) Seller may, in its sole discretion, without liability or penalty, make partial shipments of Goods to Buyer, if applicable. Each shipment will constitute a
separate sale, and Buyer shall pay for the units shipped whether such shipment is in whole or partial fulfillment of Buyer’s purchase order.
(d) If for any reason Buyer fails to accept delivery of any of the Goods on the date fixed pursuant to Seller’s notice that the Goods have been delivered at
the Shipping Point, or if Seller is unable to deliver the Goods at the Shipping Point on such date because Buyer has not provided appropriate instructions,
documents, licenses or authorizations: (i) risk of loss to the Goods shall pass to Buyer; (ii) the Goods shall be deemed to have been delivered; and (iii) Seller,
at its option, may store the Goods until Buyer picks them up, whereupon Buyer shall be liable for all related costs and expenses (including, without limitation,
storage and insurance).
3. Non-delivery.
(a) The quantity of any installment of Goods as recorded by Seller on dispatch from Seller’s place of business is conclusive evidence of the quantity received
by Buyer on delivery unless Buyer can provide conclusive evidence proving the contrary.
(b) Seller shall not be liable for any non-delivery of Goods (even if caused by Seller’s negligence) unless Buyer gives written notice to Seller of the non-delivery
within three (3) days of the date when the Goods would in the ordinary course of events have been received.
(c) Any liability of Seller for non-delivery of the Goods shall be limited to (in Seller’s sole discretion) replacing the Goods within a reasonable time or adjusting
the invoice respecting such Goods to reflect the actual quantity delivered.
4. Shipping Terms. Unless indicated otherwise in the Acknowledgment, Delivery shall be made EXW (Incoterms 2010), Shipping Point, including without
limitation, freight and insurance costs. If no delivery terms are specified on the Acknowledgement, the method of shipping will be in the sole discretion of
Seller. Unless directed in writing otherwise by Buyer, full invoice value will be declared for all shipments.
5. Title and Risk of Loss. Title and risk of loss passes to Buyer upon delivery of the Goods at the Shipping Point. As collateral security for the payment of the
purchase price of the Goods, Buyer hereby grants to Seller a lien on and security interest in and to all of the right, title and interest of Buyer in, to and under
the Goods, wherever located, and whether now existing or hereafter arising or acquired from time to time, and in all accessions thereto and replacements
or modifications thereof, as well as all proceeds (including insurance proceeds) of the foregoing. The security interest granted under this provision
constitutes a purchase money security interest under the California Commercial Code.
6. Amendment and Modification. These Terms may only be amended or modified in a writing which specifically states that it amends these Terms and is
signed by an authorized representative of each party.

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 xi
7. Inspection and Rejection of Nonconforming Goods.
(a) Buyer shall inspect the Goods within two (2) days of receipt (“Inspection Period”). Buyer will be deemed to have accepted the Goods unless it notifies
Seller in writing of any Nonconforming Goods during the Inspection Period and furnishes such written evidence or other documentation as required by
Seller. “Nonconforming Goods” means only the following: (i) product shipped is different than identified in Buyer’s Acknowledgement; or (ii) product’s label
or packaging incorrectly identifies its contents. Notwithstanding the foregoing, for shipped Goods that require field installation, the “re-verification” terms
in the Acknowledgement shall apply and for custom installations, the inspection and verification shall take place at Buyer’s site immediately after the
installation is completed.
(b) Seller will only accept Nonconforming Goods that are returned under Seller’s Return Material Authorization procedures then in effect (“RMA”). Buyer
shall obtain a RMA number from Seller prior to returning any Nonconforming Goods and return the Nonconforming Goods prepaid and insured to Seller at
1820 South Myrtle Avenue, Monrovia, CA 91016 or to such other location as designated in writing by Seller for the examination to take place there. If Seller
reasonably verifies Buyer’s claim that the Goods are Nonconforming Goods and that the nonconformance did not developed by use from Buyer, Seller shall,
in its sole discretion, (i) replace such Nonconforming Goods with conforming Goods, or (ii) credit or refund the Price for such Nonconforming Goods pursuant
to the terms set forth herein. Notwithstanding the foregoing, the only remedy for Nonconforming Goods that are custom systems is repair (not refund or
replacement). No returns for Nonconforming Goods are allowed after thirty (30) days from the original shipping date.
(c) Buyer acknowledges and agrees that the remedies set forth in Section 7(a) are Buyer’s exclusive remedies for the delivery of Nonconforming Goods.
Except as provided under Section 7(a) and Section 14, all sales of Goods to Buyer are made on a one-way basis and Buyer has no right to return Goods
purchased under this Agreement to Seller.
8. Price.
(a) Buyer shall purchase the Goods from Seller at the prices (the “Prices”) set forth in Seller’s published catalogue literature in force as of the date of the
Sales Quotation. However, the Prices shown in such catalogue literature or any other publication are subject to change without notice. Unless specifically
stated to the contrary in the Sales Quotation, quoted Prices and discounts are firm for thirty (30) days from the date of the Sales Quotation. Unless otherwise
stated, prices are quoted EXW (Incoterms 2010), Shipping Point. Unless otherwise stated in the Acknowledgement, if the Prices should be increased by
Seller before delivery of the Goods to a carrier for shipment to Buyer, then these Terms shall be construed as if the increased prices were originally inserted
herein, and Buyer shall be billed by Seller on the basis of such increased prices.
(b) All Prices are exclusive of all sales, use and excise taxes, and any other similar taxes, duties and charges of any kind imposed by any governmental
authority on any amounts payable by Buyer. Buyer shall be responsible for all such charges, costs and taxes (present or future); provided, that, Buyer shall
not be responsible for any taxes imposed on, or with respect to, Seller’s income, revenues, gross receipts, personnel or real or personal property or other
assets.
9. Payment Terms.
(a) Unless otherwise provided in the Acknowledgement, if Buyer has approved credit with Seller, Buyer shall pay all invoiced amounts due to Seller within
thirty (30) days from the date of Seller’s invoice. If Seller does not have Buyer’s financial information and has not provided pre-approved credit terms for
Buyer, the payment must be made in cash with order or C.O.D. in US dollars. If Buyer has approved credit terms, the payment may be made by cash with
order, wire transfer of immediately available funds, or check in US dollars. Certain products require a down payment. Any payment terms other than set
forth above will be identified in the Acknowledgement. Notwithstanding anything herein to the contrary, all prepaid deposits and down payments are non-
refundable. If a deposit is not received when due, Seller reserves the right to postpone manufacturing of Goods until payment is received. Seller will not be
responsible for shipment delays due to deposit payment delays.
(b) In Seller’s sole discretion, Seller may access Buyer interest on all late payments at the lesser of the rate of 1.5% per month or the highest rate permissible
under applicable law, calculated daily and compounded monthly. Buyer shall reimburse Seller for all costs incurred in collecting any late payments, including,
without limitation, attorneys’ fees. In addition to all other remedies available under these Terms or at law (which Seller does not waive by the exercise of
any rights hereunder), Seller shall be entitled to suspend the delivery of any Goods if Buyer fails to pay any amounts when due hereunder and such failure
continues for ten (10) days following written notice thereof.
(c) Buyer shall not withhold payment of any amounts due and payable by reason of any set-off of any claim or dispute with Seller, whether relating to Seller’s
breach, bankruptcy or otherwise.
10. Intellectual Property; Software License.
(a) To the extent that any Goods provided under this Agreement contains software, whether pre-installed, embedded, in read only memory, or found on
any other media or other form (“Software”), such Software and accompanying documentation are licensed to Buyer, not sold and shall remain the sole and
exclusive property of Seller or third party licensors of Seller. Seller grants Buyer a non-exclusive license to use the Software solely as provided in and in
connection with the use of the Goods in which such Software is contained and in accordance with any applicable user documentation provided with such
Goods and subject to the provisions of this Agreement. Certain of Seller’s Goods may include third party software such as computer operating systems.
Licenses to such third party software are subject to the terms and conditions of any applicable third party software license agreements. Unless identified in
the Acknowledgement, no license is granted by Seller with respect to such third party software products that may be provided with the Goods (if any). Seller
makes no warranties regarding any third party software that may accompany the Goods or otherwise and such software is explicitly included in the definition
of Third Party Products below.
(b) Buyer shall not copy, modify, or disassemble, or permit others to copy, modify, or disassemble, the Software, nor may Buyer modify, adapt, translate,
reverse assemble, decompile, or otherwise attempt to derive source code from the Software. Buyer shall not transfer possession of the Software except as
part of, or with, the Goods, and each such transfer shall be subject to the restrictions contained herein. Buyer may not sublicense, rent, loan, assign or
otherwise transfer the Software or documentation, and Buyer shall retain on all copies of the Software and documentation all copyright and other proprietary
notices or legends appearing therein or thereon. Seller may terminate this license upon written notice for any violation of any of the terms of this license

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
xii 990-430
or any material breach of any provision of this Agreement. Buyer shall immediately discontinue use of the Software upon any termination of this license or
Agreement. This license shall terminate upon any termination of the Agreement.
(c) All patents, trademarks, copyrights or other intellectual property rights embodied in the Goods, including without limitation the Software, are owned by
Seller and its licensors. Seller and its licensors retain all right, title and interest in such intellectual property rights. Except as expressly set forth herein, no
license rights or ownership in or to any of the foregoing is granted or transferred hereunder, either directly or by implication. ALL RIGHTS RESERVED.
(d) If Buyer is the United States Government or any agency thereof, each of the components of the Software and user documentation are a “commercial
item,” and “computer software” as those terms are defined at 48 C.F.R. 2.101, consisting of “commercial computer software” and “commercial computer
software documentation,” as such terms are used in 48 C.F.R. 12.212. Consistent with 48 C.F.R. 12.212 and 48 C.F.R. 227.7202-1 through 227.7202-4, all
United States government Buyers acquire only those rights in the Software and user documentation that are specified in this Agreement.
11. Installation and Other Services. Seller shall provide installation services (“Installation Services”) to Buyer if set forth in the Acknowledgment. If
Installation Services are provided for in the Acknowledgement, Buyer will prepare the location for the installation consistent with Buyer’s written
specifications and Buyer will install necessary system cable and assemble any necessary equipment or hardware not provided by Seller, unless agreed
otherwise in writing by the parties. For Goods that will be operated on or in connection with Buyer supplied hardware or software, Buyer is responsible for
ensuring that its hardware and software conform with Seller minimum hardware and software requirements as made available to Buyer. Seller shall provide
other field services, such as maintenance visits and field repairs (the “Other Services” and together with the Installation Services, the “Services”) if set forth
in the Acknowledgement.
12. Limited Warranty.
(a) Subject to the exceptions and upon the conditions set forth herein, Seller warrants to Buyer that for a period of one (1) year from the date of shipment
(“Warranty Period”), that such Goods will be free from material defects in material and workmanship.
(b) Notwithstanding the foregoing and anything herein to the contrary, the warranty set forth in this Section 12 shall be superseded and replaced in its
entirety with the warranty set forth on Exhibit A hereto if the Goods being purchased are specialty products, which include, without limitation, laser products,
fiber markers, custom systems, workstations, Seller-installed products, non-catalogue products and other custom-made items (each a “Specialty Product”).
(c) EXCEPT FOR THE WARRANTY SET FORTH IN SECTION 12(A), SELLER MAKES NO WARRANTY WHATSOEVER WITH RESPECT TO THE GOODS (INCLUDING
ANY SOFTWARE) OR SERVICES, INCLUDING ANY (a) WARRANTY OF MERCHANTABILITY; (b) WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE; (c)
WARRANTY OF TITLE; OR (d) WARRANTY AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF A THIRD PARTY; WHETHER EXPRESS OR
IMPLIED BY LAW, COURSE OF DEALING, COURSE OF PERFORMANCE, USAGE OF TRADE OR OTHERWISE.
(d) Products manufactured by a third party and third party software (“Third Party Product”) may constitute, contain, be contained in, incorporated into,
attached to or packaged together with, the Goods. Third Party Products are not covered by the warranty in Section 12(a). For the avoidance of doubt,
SELLER MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO ANY THIRD PARTY PRODUCT, INCLUDING ANY (a) WARRANTY OF
MERCHANTABILITY; (b) WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE; (c) WARRANTY OF TITLE; OR (d) WARRANTY AGAINST INFRINGEMENT OF
INTELLECTUAL PROPERTY RIGHTS OF A THIRD PARTY; WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF PERFORMANCE, USAGE
OF TRADE OR OTHERWISE. Notwithstanding the foregoing, in the event of the failure of any Third Party Product, Seller will assist (within reason) Buyer (at
Buyer’s sole expense) in obtaining, from the respective third party, any (if any) adjustment that is available under such third party’s warranty.
(e) Seller shall not be liable for a breach of the warranty set forth in Section 12(a) unless: (i) Buyer gives written notice of the defect, reasonably described,
to Seller within five (5) days of the time when Buyer discovers or ought to have discovered the defect and such notice is received by Seller during the
Warranty Period; (ii) Seller is given a reasonable opportunity after receiving the notice to examine such Goods; (iii) Buyer (if requested to do so by Seller)
returns such Goods (prepaid and insured to Seller at 1820 South Myrtle Avenue, Monrovia, CA 91016or to such other location as designated in writing by
Seller) to Seller pursuant to Seller’s RMA procedures and Buyer obtains a RMA number from Seller prior to returning such Goods for the examination to take
place; and (iii) Seller reasonably verifies Buyer’s claim that the Goods are defective and that the defect developed under normal and proper use.
(f) Seller shall not be liable for a breach of the warranty set forth in Section 12(a) if: (i) Buyer makes any further use of such Goods after giving such notice;
(ii) the defect arises because Buyer failed to follow Seller’s oral or written instructions as to the storage, installation, commissioning, use or maintenance of
the Goods; (iii) Buyer alters or repairs such Goods without the prior written consent of Seller; or (iv) repairs or modifications are made by persons other than
Seller’s own service personnel, or an authorized representative’s personnel, unless such repairs are made with the written consent of Seller in accordance
with procedures outlined by Seller.
(g) All expendables such as electrodes are warranted only for defect in material and workmanship which are apparent upon receipt by Buyer. The foregoing
warranty is negated after the initial use.
(h) Subject to Section 12(e) and Section 12(f) above, with respect to any such Goods during the Warranty Period, Seller shall, in its sole discretion, either: (i)
repair or replace such Goods (or the defective part) or (ii) credit or refund the price of such Goods at the pro rata contract rate, provided that, if Seller so
requests, Buyer shall, at Buyer’s expense, return such Goods to Seller.
(i) THE REMEDIES SET FORTH IN SECTION 12(H) SHALL BE BUYER’S SOLE AND EXCLUSIVE REMEDY AND SELLER’S ENTIRE LIABILITY FOR ANY BREACH OF
THE LIMITED WARRANTY SET FORTH IN SECTION 12(A). Representations and warranties made by any person, including representatives of Seller, which are
inconsistent or in conflict with the terms of this warranty, as set forth above, shall not be binding upon Seller.
13. Limitation of Liability.
(a) IN NO EVENT SHALL SELLER BE LIABLE FOR ANY CONSEQUENTIAL, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR PUNITIVE DAMAGES, LOST PROFITS
OR REVENUES OR DIMINUTION IN VALUE, LOSS OF INFORMATION OR DATA, OR PERSONAL INJURY OR DEATH ARISING IN ANY WAY OUT OF THE
MANUFACTURE, SALE, USE, OR INABILITY TO USE ANY GOODS, SOFTWARE OR SERVICE, ORARISING OUT OF OR RELATING TO ANY BREACH OF THESE
TERMS, WHETHER OR NOT THE POSSIBILITY OF SUCH DAMAGES HAS BEEN DISCLOSED IN ADVANCE BY BUYER OR COULD HAVE BEEN REASONABLY

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 xiii
FORESEEN BY BUYER, REGARDLESS OF THE LEGAL OR EQUITABLE THEORY (CONTRACT, TORT OR OTHERWISE) UPON WHICH THE CLAIM IS BASED, AND
NOTWITHSTANDING THE FAILURE OF ANY AGREED OR OTHER REMEDY OF ITS ESSENTIAL PURPOSE. (b) IN NO EVENT SHALL SELLER’S AGGREGATE
LIABILITY ARISING OUT OF OR RELATED TO THIS AGREEMENT, WHETHER ARISING OUT OF OR RELATED TO BREACH OF CONTRACT, TORT (INCLUDING
NEGLIGENCE) OR OTHERWISE, EXCEED THE TOTAL OF THE AMOUNTS PAID TO SELLER FOR THE GOODS SOLD HEREUNDER.
(c) ALL WARRANTIES SET FORTH HEREIN, DIRECT OR IMPLIED, ARE VOIDED IF THE INITIAL INSTALLATION AND START-UP OF THE SUBJECT GOOD IS NOT
SUPERVISED BY AN AUTHORIZED REPRESENTATIVE OF SELLER. AFTER INSTALLATION, ANY RE-ALIGNMENT, RE-CLEANING, OR RE-CALIBRATION,
PROVIDED THEY ARE NOT RELATED TO A PROVEN DEFECT IN MATERIALS OR WORKMANSHIP, SHALL BE PERFORMED BY AN AUTHORIZED
REPRESENTATIVE OF SELLERAT THE CURRENT SERVICE RATES.
(d) WHERE GOODS ARE SUBJECT TO A MOVE TO ANOTHER LOCATION AFTER THE ORIGINAL INSTALLATION HAS BEEN MADE, THE WARRANTY MAY BE
MAINTAINED ONLY IF SUPERVISED BY AN AUTHORIZED REPRESENTATIVE OF SELLER. SELLER, FOR A SERVICE CHARGE, WILL ARRANGE FOR AND
SUPERVISE THE DISCONNECTION, TRANSPORTATION, REINSTALLATION AND START-UP OF THE EQUIPMENT. CLAIMS FOR DAMAGE IN SHIPMENT ARE
THE RESPONSIBILITY OF BUYER AND SHALL BE FILED PROMPTLY WITH THE TRANSPORTATION COMPANY.
14. Return Goods Policy. Seller’s products may be returned to Seller for credit within sixty (60) days of shipment subject to the following conditions.
(a) In order to return products for credit, Buyer must obtain a RMA number from Seller. Upon receipt, it must be executed by an authorized person and
then returned with the Goods. Goods returned to Seller without a RMA will be returned at Buyer’s expense.
(b) Goods are to be returned to Seller at 1820 South Myrtle Avenue, Monrovia, CA 91016 with Freight Prepaid. Seller will not accept collect shipments.
(c) Restocking fees will be assessed in accordance with the following schedules: (i) Goods returned within the first thirty (30) days from shipment date will
be restocked less twenty percent (20%) of the amount billed on the original invoice. (ii) Goods returned over thirty (30) days of shipment but less than sixty
(60) days will be restocked less thirty percent (30%) of the amount billed on the original invoice. (iii) No returns are allowed after sixty (60) days from the
original shipping date.
(d) The restocking fees set forth above are the minimum fees. If a returned Good requires rework to restore it to a saleable condition, further charges will
be assessed. Seller’s quality assurance department will document the condition of the Goods when received by Seller and report their findings to Buyer.
(e) Notwithstanding the foregoing provisions of this Section 14, the following Goods cannot be returned, are not eligible for any credit and cannot be
restocked: (i) custom or modified products and (ii) any expendable product(s) that have been used.
15. Compliance with Law and Indemnification. Buyer shall comply with all applicable laws, regulations and ordinances. Buyer shall maintain in effect all
the licenses, permissions, authorizations, consents and permits that it needs to carry out its obligations under this Agreement. Buyer shall comply with all
export and import laws of all countries involved in the sale of the Goods under this Agreement or any resale of the Goods by Buyer. Goods, Services and
technical data delivered by Seller shall be subject to U.S. export controls. Buyer shall, and shall cause its customers to, obtain all licenses, permits and
approvals required by any government and shall comply with all applicable laws, rules, policies and procedures of the applicable government and other
competent authorities. Buyer will indemnify and hold Seller harmless for any violation or alleged violation by Buyer of such laws, rules, policies or procedures.
Buyer shall not transmit, export or re-export, directly or indirectly, separately or as part of any system, the Goods or any technical data (including processes
and Services) received from Seller, without first obtaining any license required by the applicable government, including without limitation, the U.S.
government. Buyer also certifies that none of the Goods or technical data supplied by Seller under this Agreement will be sold or otherwise transferred to,
or made available for use by or for, any entity that is engaged in the design, development, production or use of nuclear, biological or chemical weapons or
missile technology. No Buyer information will be deemed “technical data” unless Buyer specifically identifies it to Seller as such. Buyer assumes all
responsibility for shipments of Goods requiring any government import clearance. Seller may terminate this Agreement if any governmental authority
imposes antidumping or countervailing duties or any other penalties on Goods. For all international shipments, Seller requires that all required Export
Control documentations, including Form BIS-711 Statement by Ultimate Consignee and Purchases, are submitted by Buyer along with the purchase order.
Seller reserves the right to postpone shipment until all documentations are completed and submitted to Seller. Seller will not be responsible for shipment
delays due to non-compliance by Buyer of the foregoing two sentences.
16. Termination. In addition to any remedies that may be provided under these Terms, Seller may terminate this Agreement with immediate effect upon
written notice to Buyer, if Buyer: (i) fails to pay any amount when due under this Agreement and such failure continues for ten (10) days after Buyer’s receipt
of written notice of nonpayment; (ii) has not otherwise performed or complied with any of these Terms, in whole or in part; or (iii) becomes insolvent, files
a petition for bankruptcy or commences or has commenced against it proceedings relating to bankruptcy, receivership, reorganization or assignment for the
benefit of creditors.
17. Waiver. No waiver by Seller of any of the provisions of this Agreement is effective unless explicitly set forth in writing and signed by Seller. No failure to
exercise, or delay in exercising, any rights, remedy, power or privilege arising from this Agreement operates or may be construed as a waiver thereof. No
single or partial exercise of any right, remedy, power or privilege hereunder precludes any other or further exercise thereof or the exercise of any other
right, remedy, power or privilege.
18. Confidential Information. All non-public, confidential or proprietary information of Seller, including, but not limited to, specifications, samples, patterns,
designs, plans, drawings, documents, data, business operations, customer lists, pricing, discounts or rebates, disclosed by Seller to Buyer, whether disclosed
orally or disclosed or accessed in written, electronic or other form or media, and whether or not marked, designated or otherwise identified as “confidential,”
in connection with this Agreement is confidential, solely for the use of performing this Agreement and may not be disclosed or copied unless authorized in
advance by Seller in writing. Upon Seller’s request, Buyer shall promptly return all documents and other materials received from Seller. Seller shall be
entitled to injunctive relief for any violation of this Section 18. This Section 18 does not apply to information that is: (a) in the public domain through no
fault of Buyer; (b) known to Buyer at the time of disclosure without restriction as evidenced by its records; or (c) rightfully obtained by Buyer on a non-
confidential basis from a third party.

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
xiv 990-430
19. Force Majeure. Seller shall not be liable or responsible to Buyer, nor be deemed to have defaulted or breached this Agreement, for any failure or delay
in fulfilling or performing any term of this Agreement when and to the extent such failure or delay is caused by or results from acts or circumstances beyond
the reasonable control of Seller including, without limitation, acts of God, flood, fire, earthquake, explosion, governmental actions, war, invasion or hostilities
(whether war is declared or not), terrorist threats or acts, riot, or other civil unrest, national emergency, revolution, insurrection, epidemic, lock-outs, strikes
or other labor disputes (whether or not relating to either party’s workforce), or restraints or delays affecting carriers or inability or delay in obtaining supplies
of adequate or suitable materials, materials or telecommunication breakdown or power outage (each a “Force Majeure Event”), provided that, if the event
in question continues for a continuous period in excess of thirty (30) days, Buyer shall be entitled to give notice in writing to Seller to terminate this
Agreement.
20. Assignment. Buyer shall not assign any of its rights or delegate any of its obligations under this Agreement without the prior written consent of Seller.
Any purported assignment or delegation in violation of this Section 20 is null and void. No assignment or delegation relieves Buyer of any of its obligations
under this Agreement.
21. Relationship of the Parties. The relationship between the parties is that of independent contractors. Nothing contained in this Agreement shall be
construed as creating any agency, partnership, joint venture or other form of joint enterprise, employment or fiduciary relationship between the parties,
and neither party shall have authority to contract for or bind the other party in any manner whatsoever.
22. No Third-Party Beneficiaries. This Agreement is for the sole benefit of the parties hereto and their respective successors and permitted assigns and
nothing herein, express or implied, is intended to or shall confer upon any other person or entity any legal or equitable right, benefit or remedy of any nature
whatsoever under or by reason of these Terms.
23. Governing Law. All matters arising out of or relating to this Agreement is governed by and construed in accordance with the internal laws of the State
of California without giving effect to any choice or conflict of law provision or rule (whether of the State of California or any other jurisdiction) that would
cause the application of the laws of any jurisdiction other than those of the State of California.
24. Dispute Resolution.
(a) If Buyer is an entity formed under the laws of the United States of America, or any of its states, districts or territories (“U.S. Law”), then any dispute, legal
suit, action or proceeding arising out of or relating to this Agreement shall be adjudicated and decided in the federal courts of the United States of America
or the courts of the State of California in each case located in the City of Los Angeles and County of Los Angeles, California and each party irrevocably submits
to the exclusive and personal jurisdiction of such courts in any such dispute, suit, action or proceeding.
(b) If Buyer is an entity formed under the laws of any country, state, district or territory other than U.S. Law, then the parties irrevocably agree that any
dispute, legal suit, action or proceeding arising out of or relating to this Agreement shall be submitted to the International Court of Arbitration of the
International Chamber of Commerce (“ICC”) and shall be finally settled under the Rules of Arbitration of the ICC. The place and location of the arbitration
shall be in Los Angeles, California, pursuant to the ICC’s Rules of Arbitration and shall be finally settled in accordance with said rules. The arbitration shall
be conducted before a panel of three arbitrators. Each party shall select one arbitrator and the two arbitrators so selected shall select the third arbitrator,
who shall act as presiding arbitrator. Notwithstanding the foregoing, if the matter under dispute is $500,000 or less, there shall only be one arbitrator who
shall be mutually selected by both parties. If the party-selected arbitrators are unable to agree upon the third arbitrator, if either party fails to select an
arbitrator, or in the case that only one arbitrator is required and the parties are unable to agree, then the International Court of Arbitration shall choose the
arbitrator. The language to be used in the arbitral proceeding shall be English. The arbitrator(s) shall have no authority to issue an award that is contrary to
the express terms of this Agreement or the laws of the State of California or applicable US Federal Law, and the award may be vacated or corrected on
appeal to a court of competent jurisdiction for any such error. The arbitrator(s) shall be specifically empowered to allocate between the parties the costs of
arbitration, as well as reasonable attorneys’ fees and costs, in such equitable manner as the arbitrator(s) may determine. The arbitrator(s) shall have the
authority to determine issues of arbitrability and to award compensatory damages, but they shall not have authority to award punitive or exemplary
damages. Judgment upon the award so rendered may be entered in any court having jurisdiction or application may be made to such court for judicial
acceptance of any award and an order of enforcement, as the case may be. In no event shall a demand for arbitration be made after the date when institution
of a legal or equitable proceeding based upon such claim, dispute or other matter in question would be barred by the applicable statute of limitations.
Notwithstanding the foregoing, either party shall have the right, without waiving any right or remedy available to such party under this Agreement or
otherwise, to seek and obtain from any court of competent jurisdiction any interim or provisional relief that is necessary or desirable to protect the rights
or property of such party, pending the selection of the arbitrator(s) hereunder or pending the arbitrator(s)’ determination of any dispute, controversy or
claim hereunder.
25. Notices. All notices, request, consents, claims, demands, waivers and other communications hereunder (each, a “Notice”) shall be in writing and
addressed to the parties at the addresses set forth on the face of the Acknowledgement or to such other address that may be designated by the receiving
party in writing. All Notices shall be delivered by personal delivery, nationally recognized overnight courier (with all fees pre-paid), facsimile (with
confirmation of transmission) or certified or registered mail (in each case, return receipt requested, postage prepaid). Except as otherwise provided in this
Agreement, a Notice is effective only (a) upon receipt of the receiving party, upon confirmation of delivery by nationally recognized overnight courier or
upon forty-eight (48) hours after being sent by certified or registered mail (as applicable), and (b) if the party giving the Notice has complied with the
requirements of this Section 25.
26. Severability. If any term or provision of this Agreement is invalid, illegal or unenforceable in any jurisdiction, such invalidity, illegality or unenforceability
shall not affect any other term or provision of this Agreement or invalidate or render unenforceable such term or provision in any other jurisdiction.
27. Survival. Provisions of these Terms which by their nature should apply beyond their terms will remain in force after any termination or expiration of this
Order including, but not limited to, the following provisions: Compliance with Laws, Confidentiality, Governing Law, Dispute Resolution, Survival, and the
restrictions on Software in Sections 10(b), (c) and (d).

CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 1-1
CHAPTER 1
Description
Section I: Features
Features
Amada Weld Tech CD-A Dual Pulse Resistance Welding Power Supplies precisely control welding
energy and weld head timing.For the rest of this manual, the CD-A Dual Pulse Resistance Welding
Power Supply will simply be called the Power Supply.
The CD-A125A and CD-A300A contain the same set of control features. The CD-A1000A has all of the
features of the CD-A product family except; the polarity is fixed and upslope is not user settable in the
weld schedules.
•Multi-function microprocessor control
facilitates multiple applications at a single
work-station and is compatible with both
manual and air actuated weld heads. The
Power Supply provides repeatable process
control and protection from weld schedule
changes by unauthorized personnel.
•
Dual pulse welding can eliminate weld splash
and improve weld quality, especially when
welding plated materials.
•
A peak current monitor displays actual peak
current delivered to the weld on each pulse.
•
User programmable monitor limits on each
pulse can help to detect poor welding
conditions. Programmable test pulses in
conjunction with the INHIBIT SECOND PULSE
feature can inhibit welding when conditions
are out of limits on the test pulse.
•The upslope feature improves welding when parts are oxidized, surfaces are contaminated, or parts
do not mate well (this feature is not present in the CD-A1000A).
•Alternating polarity allows the user to program pulse polarity changes each time the welder is fired.
This allows the user to equalize the wear between two electrodes in many parallel gap welding
processes (this feature is not present in the CD-A1000A).
•Five relays provide rear panel output signals for UNIT READY TO WELD, WELD COMPLETED, WELD
OUT OF LIMITS, ALARM, and WELD COUNTER PRESET LIMIT.

CHAPTER 1: DESCRIPTION
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
1-2 990-430
•Two air valve drivers are provided for sequential control of two separate air operated weld heads,
when desired. As shipped, Air Valve Driver 2 is configured for 24 VAC weld head operation, but
may be reconfigured for 24VDC compatibility when required. See Appendix B, Electrical & Data
Connections for details on how to select the drive voltage. Air Valve Driver 1 is only compatible with
24VDC valve drivers.
•Remote schedule selection simplifies use in automated systems. The CONTROL SIGNALS connector
provides remote control capability for REMOTE WELD INHIBIT, REMOTE WELD SCHEDULE
SELECTION, and REMOTE FIRING.
•The CHAIN SCHEDULE feature allows consecutive schedules to be chained together.
•An advanced charging circuit provides rapid recharging and greater throughput.
•External Emergency Stop function.
Display Screens
Large, remarkably intuitive screens, allow the user to see everything at a glance. See Chapter 3, Using
Display Screens for complete instructions. Briefly, the RUN screen is BLUE, welds within limits display
GREEN, and welds out of limits display RED as indicated below.
Pulse 1 & Pulse 2 Limits OFF
Pulse 1 Out of Limits / Pulse 2 Within Limits

CHAPTER 1: DESCRIPTION
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 1-3
To “edit” RUN, MENU, or LIMITS / COUNTERS
screens, press the appropriate
PULSE 1, PULSE 2,
SQZ/HOLD, LIMITS/COUNTERS
or MENU button
until the screen changes to
BLACK indicating
you’ve ent
ered “edit” mode.
Highlight the item being edited in white as shown
at the right. Edit values using
the ▲▼ (up/down)
arrows
keys, then advance to the next field.
When finished, press the
SAVE button, which will
"save changes" and return the display to the
BLUE
run mode screen. You’re ready to weld!
NOTE:
If you edited the limits screen, you will
need to press
RUN after SAVE to enable the weld
mode.
See Chapter 3, Using the Display Screens for details on using these features.
•The schedule lock feature restricts welding to the one selected weld schedule and prevents changing
that schedule.
•The program lock feature allows the use of all 63 schedules, but does not allow editing schedule
values.
•The digital display allows operators to set welding energy accurately and quickly.
•The Power Supply is compatible with both manually and air actuated weld heads with 1-level or 2-
level foot switches.
•The Power Supply is compatible with force fired and non-force fired weld heads. The SQUEEZE and
HOLD delay times are adjustable from 0 to 2,999ms and 20 to 2,999ms respectively.
•A built-in weld counter allows controlling events based on the number of welds completed. The
counter limit provides an output signal when the count equals or exceeds the user-programmable value.
•The firing circuit is compatible with single pole, double pole or optical firing switches.
•The energy monitor and lockout prevent poor welds caused by premature firing of the power supply
before the capacitor bank has been properly charged or discharged.
•The line failure turndown safety feature discharges the capacitor bank when input power is interrupted.
•The Power Supply is protected from radio frequency and electromagnetic interference, resulting in
reliable operation even in high electrical noise environments. Input switch debounce circuitry
eliminates false triggering.
Detailed instructions on using these features are located in Chapter 4, Operating Instructions.

CHAPTER 1: DESCRIPTION
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
1-4 990-430
Description
The 125, 300, and 1000 Watt-second, stored energy, capacitor discharge, dual pulse power supplies are
versatile and can effectively solve most precision, small part resistance welding problems.
Up to 63 weld schedules can be programmed and saved into memory. A built-in schedule protection
feature protects weld schedules from unauthorized or inadvertent changes. The exclusive charge monitor
and firing lockout features guarantee accurate energy output independent of line voltage fluctuations
and/or process speed.
Dual pulse welding improves weld quality and can eliminate weld splash. Dual pulse means each weld
is performed with two pulses with independent energy levels and independent polarity. When welding
parts with plating or contamination the first pulse can be used to consistently seat the electrodes onto the
part surfaces. The second pulse welds the base metals.
The remote schedule feature allows the weld schedules to be selected in automated applications.
CD-A Power Supplies are designed to operate at either 110-120VAC ±10% or 220-240VAC ±10%, 50/60
Hz and can be used with manual, user actuated, or air actuated weld heads.

CHAPTER 1: DESCRIPTION
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430 1-5
Section II: Major Components
Major Components
The major components are located on the front panel, which contain operator controls and indicators,
and on the rear panel, which contain the circuit breaker, power and signal connectors. The rear panel
connections are discussed in Chapter 2, Installation and Setup.
Front Panel Controls
The function of each item is described on the following pages.
Front Panel Controls
UP / DOWN BUTTONS
RUN
MENU
PULSE 2
LIMITS / COUNTERS
SQUEEZE / HOLD
WELD / NO WELD
POLARITY SELECT
SAVE
PULSE SELECT
PULSE 1
CLEAR
CHARGE MONITOR
PULSE 1 DATA DISPLAY SCREEN PULSE 2 DATA

CHAPTER 1: DESCRIPTION
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
1-6 990-430
UP / DOWN Buttons
The UP (+) and DOWN (−) buttons have two functions.
●During “normal” operation, up and down buttons are used to scroll through the 63 schedules to select
a desired schedule. The schedule number displays at the lower right corner of the front panel display
screen.
●In “editing” mode, these buttons also are used to increase or decrease the highlighted values.
Polarity Select
This button is only active when the Power Supply is in the “editing” mode. Press this button repeatedly
until the polarity you want displays adjacent to the Pulse 1 or Pulse 2, 3-digit energy display.
For example, the front panel display screen shown on the previous page, indicates positive (+) polarity
selected for both Pulse 1 and Pulse 2.
NOTE: This button is not active on the CD-A1000A
Pulse Select
This button is only active when the Power Supply is in the “editing” mode. Press this button repeatedly
until the pulse duration you want is indicated directly below the 3-digit energy display. The front panel
display screen shown on the previous page, indicates MEDIUM UPSLOPE pulse duration selected for Pulse
1 and MEDIUM UPSLOPE pulse duration selected for Pulse 2.
NOTE: The VERY SHORT setting provides the shortest duration for a given energy setting. The SHORT
setting will provide the highest peak current for a given energy setting. The LONG setting will provide
the lowest peak current and longest duration for a given energy setting.
RUN
Pressing the RUN button causes the BLUE RUN screen (shown on the previous page) to be displayed.
Welding is allowed only when the BLUE RUN screen is displayed.
MENU
Pressing this button momentarily causes the Menu screen to be displayed.
Press and hold this button for 1 second to display the Menu editing screen. Welding is not allowed when
the Menu screens are displayed. Additional instructions for the Menu screen are in Chapter 3, Using
Display Screens.