Nexen WEB CONTROL PA100 User manual

(i)
Photo Head Amplifier System
PA100
FORM NO. L-20194-B-0601
WEB CONTROL PRODUCTS
User Manual

(ii)
In accordance with Nexen’s established policy of constant product improvement, the specifications contained in this
manual are subject to change without notice. Technical data listed in this manual are based on the latest information
available at the time of printing and are also subject to change without notice.
Technical Support:
800-843-7445
[phone]
www.nexengroup.com
Nexen Group, Inc.
560 Oak Grove Parkway
Vadnais Heights, Minnesota 55127
ISO 9001 Certified
Copyright 2000 Nexen Group, Inc.
Read this manual carefully before installation and operation.
Follow Nexen's instructions and integrate this unit into your system with care.
This unit should be installed, operated and maintained by qualified personnel ONLY.
Improper installation can damage your system or cause injury or death.
Comply with all applicable codes.
WARNING

(iii)
TABLE OF CONTENTS
Introduction---------------------------------------------------------------------------------------------------------------------------------------- 1
Theory of Operation ---------------------------------------------------------------------------------------------------------------------------1
Installation ---------------------------------------------------------------------------------------------------------------------------------------- 1
Electrical Connections -----------------------------------------------------------------------------------------------------------------------2
Calibration -----------------------------------------------------------------------------------------------------------------------------------------2
Maintenance--------------------------------------------------------------------------------------------------------------------------------------3
Specifications------------------------------------------------------------------------------------------------------------------------------------3
Mounting Dimensions-------------------------------------------------------------------------------------------------------------------------4
Warranties----------------------------------------------------------------------------------------------------------------------------------------- 5

1FORM NO. L-20194-B-0601
INTRODUCTION
Read this manual carefully, making full use of its explanations and instructions. The “Know How” of safe, continuous,
trouble-free operation depends on the degree of your understanding of the system and your willingness to keep all
components in proper operating condition. Pay particular attention to all NOTES, CAUTIONS, and WARNINGS to avoid
the risk of personal injury or property damage. It is important to understand that these NOTES, CAUTIONS, and
WARNINGS are not exhaustive. Nexen cannot possibly know or evaluate all conceivable methods in which service may
be performed, or the possible hazardous consequences of each method. Accordingly, anyone who uses a procedure
that is not recommended by Nexen must first satisfy themselves that neither their safety or the safety of the product will
be jeopardized by the service method selected.
THEORY OF OPERATION
Nexen’s PA100 Photo Head Amplifier System consists
of two component parts: the PA100 Photo Head
Amplifier and either a PH16, PH21, or PH23 Photo
Head.
The Photo Head senses the movement of an opaque
web edge by means of a pulsed LED in the near infrared
range, and generates a signal proportional to the web
position.
PA100 provides the excitation signal for the Photo Head
and receives the proportional feed back signal
generated by the Photo Head. This feedback signal is
amplified by the PA100 to a bipolar + 12VDC output
signal.
Nexen’s PA100 has an eleven segment LED web edge
position indicator. The center segment is green to
indicate that the web is centered in the light pattern of
the Photo Head. To the left and right of the green LED
are five red LEDs. Each LED represents approximately
0.004 inches [0.10 mm] of error.
FIGURE 1
Mounting
Brackets
PHOTO HEAD
Install the Photo Head as described in Maintenance
Instructions provided with it.
INSTALLATION
PA100
NOTE: PA100 is an electronic component and should
be mounted in a shock, vibration, and moisture
free area, with an ambient temperature greater
than 32oF [0oC] but less than 122oF [50oC].
Use the attached Mounting Brackets to mount the
PA100 against a vertical surface (See Figure 1).

2FORM NO. L-20194-B-0601
ELECTRICAL CONNECTIONS
1. Refer to Figure 2 for electrical connections.
CALIBRATION
FIELD ADJUSTMENT WITH A VOLTMETER
1. Adjust voltmeter to proper range for 12VDC.
2. Connect negative lead to Terminal 6and positive
lead to Terminal 5.
3. Set GAIN and BIAS Pots to midrange (See Figure 3).
4. Set POWER Switch to ON (See Figure 3).
5. Insert an opaque web to block the light path of
Photo Head, then completely remove the web (See
Figure 4).
NOTE: This will cause the signal to the voltmeter
to vary from positive to negative.
6. Alternately insert and remove the opaque web,
blocking the light path of the Photo Head and
adjust the BIAS Pot until the plus and minus signals
are equal.
7. Adjust GAIN Pot until output varies between +
9.5VDC and + 12VDC equally.
8. Set POWER Switch to OFF.
9. Remove voltmeter leads from Terminals 5 and 6.
Power
Switch
Web
Web
GAIN
BIAS
Fully
Removed Fully
Inserted
FIGURE 3
FIGURE 2
Photo
Head Photo
Head
FIGURE 4
2. Supply 110 to 220VAC at Terminals 9and 10, with
Earth ground to Terminal 8.
1
2
3
4
5
6
7
8
9
10
+12VDC(11.4to12.6V) Lamp Voltage
Detection Signal
100 to 220VAC
50/60 Hz, 10 VA
0 to + 200 mVDC (200 to 300 mV)
0
0
GN
WH
RD
BK
NC
GY (SHIELD)
(Input Resistance: 2 K or more)
PHOTO
HEAD
9.5VDC to 12VDC
Output Signal

3FORM NO. L-20194-B-0601
MAINTENANCE
Although there is no required maintenance for PA100 or
the Photo Head, periodically clean light transmitting and
receiving lenses using a clean, dry cloth.
Refer to Maintenance Instructions supplied with the
Photo Head for replacement parts.
FIELD ADJUSTMENT WITHOUT A VOLTMETER
1. Set GAIN and BIAS Pots to midrange (See Figure 3).
2. Set POWER Switch to ON (See Figure 3).
3. Insert an opaque web or sample to block the light
path of Photo Head, then completely remove the
web or sample (See Figure 4).
NOTE: Insertion and removal will cause the eleven
segment LED to vary from the left hand red
lights through the green center light to the
right hand red lights (See Figure 5).
4. Adjust BIAS Pot to balance the number of LEDs
displayed for complete light blockage and complete
web removal.
5. Adjust GAIN Pot so that four right LEDs are
illuminated during complete web or sample
insertion, and four left LEDs are illuminated for
complete web or sample removal.
NOTE: This yields an output of + 9.5 to + 12VDC.
6. Set POWER Switch to OFF.
RED LEDs GREEN LED RED LEDs
FIGURE 5
SPECIFICATIONS
PA100
Power Supply----------------------------------------------------------------------------------------------------------- 100 to 240VAC, 50/60 Hz Single Phase
Power Consumption ---------------------------------------------------------------------------------------------------------------------------------------------------- 10 W
Input from PH16------------------------------------------------------------------------------------------------------------------------------------------------ 0 to 200 mV
Input Resistance-----------------------------------------------------------------------------------------------------------------------------------------------------2K Ohms
Ambient Temperature ------------------------------------------------------------------------------------------------------------------- 32oto 122oF [0oto 50oC]
Output Voltage------------------------------------------------------------------------------------------------------------------------------------------------------- ±12VDC

4FORM NO. L-20194-B-0601
MOUNTING DIMENSIONS
FIGURE 6
GAIN BIAS
POWER
ON
5.7
[145]
6.1
[155] 6.7
[170]
4.7
[120]
2.4
[60]
2.75
[70]
In
[mm]

5FORM NO. L-20194-B-0601
WARRANTIES
Warranties
Nexen warrants that the Products will be free from any defects in material or workmanship for a period of 12 months
from the date of shipment. NEXEN MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND ALL IMPLIED
WARRANTIES, INCLUDING WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. This warranty applies only if (a) the Product
has been installed, used and maintained in accordance with any applicable Nexen installation or maintenance manual
for the Product; (b) the alleged defect is not attributable to normal wear and tear; (c) the Product has not been altered,
misused or used for purposes other than those for which it was intended; and (d) Buyer has given written notice of the
alleged defect to Nexen, and delivered the allegedly defective Product to Nexen, within one year of the date of
shipment.
Exclusive Remedy
The exclusive remedy of the Buyer for any breach of the warranties set out above will be, at the sole discretion of Nexen,
a repair or replacement with new, serviceably used or reconditioned Product, or issuance of credit in the amount of the
purchase price paid to Nexen by the Buyer for the Products.
Limitation of Nexen’s Liability
TO THE EXTENT PERMITTED BY LAW NEXEN SHALL HAVE NO LIABILITY TO BUYER OR ANY OTHER PERSON
FOR INCIDENTAL DAMAGES, SPECIAL DAMAGES, CONSEQUENTIAL DAMAGES OR OTHER DAMAGES OF
ANY KIND OR NATURE WHATSOEVER, WHETHER ARISING OUT OF BREACH OF WARRANTY OR OTHER
BREACH OF CONTRACT, NEGLIGENCE OR OTHER TORT, OR OTHERWISE, EVEN IF NEXEN SHALL HAVE
BEENADVISEDOFTHEPOSSIBILITY OR LIKELIHOOD OF SUCH POTENTIAL LOSS OR DAMAGE. For all of
the purposes hereof, the term “consequential damages” shall include lost profits, penalties, delay images, liquidated
damages or other damages and liabilities which Buyer shall be obligated to pay or which Buyer may incur based upon,
related to or arising out of its contracts with its customers or other third parties. In no event shall Nexen be liable for
any amount of damages in excess of amounts paid by Buyer for Products or services as to which a breach of contract
has been determined to exist. The parties expressly agree that the price for the Products and the services was
determined in consideration of the limitation on damages set forth herein and such limitation has been specifically
bargained for and constitutes an agreed allocation of risk which shall survive the determination of any court of
competent jurisdiction that any remedy herein fails of its essential purpose.
Limitation of Damages
In no event shall Nexen be liable for any consequential, indirect, incidental, or special damages of any nature whatso-
ever, including without limitation, lost profits arising from the sale or use of the Products.
Warranty Claim Procedures
To make a claim under this warranty, the claimant must give written notice of the alleged defect to whom the Product
was purchased from and deliver the Product to same within one year of the date on which the alleged defect first
became apparent.
Nexen Group, Inc.
560 Oak Grove Parkway
Vadnais Heights, MN 55127
800.843.7445
Fax: [phone]
www.nexengroup.com
ISO 9001 Certified