Ametek VTI Instruments EMX-75 Series User manual

EMX-75XX SERIES
64-CHANNEL
DIGITAL INPUT /OUTPUT
USER’S MANUAL
P/N: 82-0127-022
Released January 19, 2021
AMETEK Programmable Power
9250 Brown Deer Road
San Diego, CA 92121, [phone]

VTI Instruments
2 EMX-75XX Preface
TABLE OF CONTENTS
TABLE OF CONTENTS..................................................................................................................................................2
About AMETEK...................................................................................................................................................4
Trademarks...........................................................................................................................................................4
Exclusion for Documentation...............................................................................................................................4
Contact Information..............................................................................................................................................4
Certification..........................................................................................................................................................5
Warranty Terms....................................................................................................................................................5
Product Return Procedure.....................................................................................................................................5
GENERAL SAFETY INSTRUCTIONS.............................................................................................................................6
Terms and Symbols ..............................................................................................................................................6
Warnings...............................................................................................................................................................6
SECTION 1....................................................................................................................................................................9
INTRODUCTION.........................................................................................................................................................9
Overview ..............................................................................................................................................................9
Features.................................................................................................................................................................9
PREPARATION FOR USE.............................................................................................................................................9
Unpacking.............................................................................................................................................................9
Inspecting the EMX-75XX Series......................................................................................................................10
INSTALLATION........................................................................................................................................................10
Install EMX-75XX .............................................................................................................................................10
STORAGE AND SHIPMENT .......................................................................................................................................10
Storing Instruments.............................................................................................................................................10
Transporting Instruments....................................................................................................................................10
ORDERING INFORMATION.......................................................................................................................................11
SPECIFICATIONS......................................................................................................................................................11
Technical Specifications.....................................................................................................................................11
Environmental Specifications.............................................................................................................................12
SECTION 2..................................................................................................................................................................13
EMX-7510, 64-CHANNEL,DIGITAL I/O CARD.......................................................................................................13
Measurement Performance............................................................................................................................14
Connector Pin/Signal Assignment.................................................................................................................15
EMX-7510 Specifications ..................................................................................................................................16
Theory of Operation ...........................................................................................................................................16
Overview.......................................................................................................................................................17
Configuration Section....................................................................................................................................18
Output Section...............................................................................................................................................18
Input Section .................................................................................................................................................18
TTL/LV Emulation Sourcing Current Typical connection............................................................................19
Sinking Current Typical connection..............................................................................................................19
EMX-7511, 64-CHANNEL,DIGITAL I/O TTL CARD...............................................................................................20
Block Diagram....................................................................................................................................................20
Connector Pin/Signal Assignment.................................................................................................................21
EMX-7511 Specifications ..................................................................................................................................21
EMX-7512, 64-CHANNEL,DIGITAL I/O LV TTL CARD.........................................................................................22
Block Diagram....................................................................................................................................................22
Connector Pin/Signal Assignment.................................................................................................................23
EMX-7512 Specifications ..................................................................................................................................23
EMX-7513, 32DI AND 32DO ISOLATED CHANNELS CARD....................................................................................24
Block Diagram....................................................................................................................................................24
Connector Pin/Signal Assignment.................................................................................................................25
EMX-7513 Specifications ..................................................................................................................................25

www.vtiinstruments.com
EMX-75XX Preface 3
EMX-7514, 64 DO ISOLATED CHANNELS CARD....................................................................................................26
Block Diagram....................................................................................................................................................26
Connector Pin/Signal Assignment.................................................................................................................27
EMX-7514 Specifications ..................................................................................................................................27
EMX-7515, 64 DI ISOLATED CHANNELS CARD .....................................................................................................28
Block Diagram....................................................................................................................................................28
Connector Pin/Signal Assignment.................................................................................................................29
EMX-7515 Specifications ..................................................................................................................................29
EMX-7519, 64-CHANNEL,DIGITAL OUTPUT CARD ...............................................................................................30
Using the Instrument ..........................................................................................................................................31
Measurement Performance............................................................................................................................31
Connector Pin/Signal Assignment.................................................................................................................32
EMX-7519 Specifications ..................................................................................................................................32
Theory of Operation ...........................................................................................................................................33
Overview.......................................................................................................................................................33
Configuration Section....................................................................................................................................34
Output Section...............................................................................................................................................34
Sinking Current Typical connection..............................................................................................................35
SECTION 3..................................................................................................................................................................36
SOFTWARE INSTALLATION......................................................................................................................................36
Driver Installation...............................................................................................................................................36
IVI Shared Components Installation (Windows Only) .................................................................................37
Instrument Driver Installation .......................................................................................................................37
DIRECT PCIe REGISTER CONTROL INTERFACE FOR EMX 75xx CARDS.............................................38
Programming the Instrument..............................................................................................................................38
Related Software Components............................................................................................................................38
Using the Driver .................................................................................................................................................39
USING THE EMX-75XX SERIES..............................................................................................................................40
Initializing\Closing the Instrument.....................................................................................................................40
Basic Operation ..................................................................................................................................................41
SECTION 4..................................................................................................................................................................45
SFP OPERATION .....................................................................................................................................................45
Introduction ........................................................................................................................................................45
Common Issues...................................................................................................................................................46
Multiple Network Ports.................................................................................................................................47
Firewall .........................................................................................................................................................47
General Web Page Operation .............................................................................................................................47
Login...................................................................................................................................................................48
Index...................................................................................................................................................................49
VTI Instruments Logo...................................................................................................................................50
EMX-75XX Soft Front Panel........................................................................................................................50
Monitor and Control Page ..................................................................................................................................51
Port Configuration Fields..............................................................................................................................51
Device Info Dialog .............................................................................................................................................52
EMX-75XX has 7 variants and their SFPs are shown below. ............................................................................53
APPENDIX -A.......................................................................................................................................................57
APPENDIX -B.......................................................................................................................................................58
APPENDIX -C.......................................................................................................................................................59
List of Accessories..............................................................................................................................................59
APPENDIX -D.......................................................................................................................................................60
EMX-75xx-TB160SE Terminal Block..........................................................................................................60

VTI Instruments
4 EMX-75XX Preface
ABOUT AMETEK
AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design and
manufacture of precision, programmable power supplies for R&D, test and measurement, process control, power
bus simulation and power conditioning applications across diverse industrial segments. From bench top supplies to
rack mounted industrial power subsystems, AMETEK Programmable Power is the proud manufacturer of Elgar,
Sorensen, California Instruments, Amrel brand power supplies. Also VTI Instruments brand which delivers
precision modular instrumentation and systems for electronic signal distribution, acquisition, and monitoring, used
in the world's most demanding test applications.
AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromechanical devices with
annualized sales of $5 billion. The Company has over 17,000 colleagues working at nearly 150 manufacturing
facilities and nearly 150 sales and service centers in the United States and 30 other countries around the world.
TRADEMARKS
AMETEK is a registered trademark of AMETEK, Inc. VTI Instruments is a trademark owned by AMETEK, Inc.
Other trademarks, registered trademarks, and product names are the property of their respective owners and are used
herein for identification purposes only.
Notice of Copyright
SMX Series Switch Cards User Manual © 2018 AMETEK Programmable Power, Inc. All rights reserved.
EXCLUSION FOR DOCUMENTATION
UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC.
(“AMETEK”):
(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF
ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER
DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR
EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR
INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE
USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S RISK, AND
(c) GIVES NOTIFICATION THAT, IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN
ENGLISH, ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF
THE TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED AMETEK
CONTENT IS WITHIN THE ENGLISH LANGUAGE VERSION, WHICH IS POSTED AT
WWW.PROGRAMMABLEPOWER.COM.
CONTACT INFORMATION
Telephone:
[phone] (toll free in North America)
[phone] (direct)
Fax:
[phone]
Email:
[email protected]
[email protected]
Web:
www.powerandtest.com

www.vtiinstruments.com
EMX-75XX Preface 5
CERTIFICATION
VTI Instruments (VTI) certifies that this product met its published specifications at the time of shipment from the
factory. VTI further certifies that its calibration measurements are traceable to the United States National Institute of
Standards and Technology (formerly National Bureau of Standards), to the extent allowed by that organization’s
calibration facility, and to the calibration facilities of other International Standards Organization members.
WARRANTY TERMS
The product referred to herein is warranted against defects in material and workmanship for a period of three years
from the receipt date of the product at customer’s facility.
AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the Product stated
above, and if the Buyer discovers and notifies AMETEK in writing of any defect in material or workmanship within
the applicable warranty period stated above, then AMETEK may, at its option: repair or replace the Product; or issue
a credit note for the defective Product; or provide the Buyer with replacement parts for the Product.
The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in accordance with the
return procedure specified below. AMETEK will, at its expense, deliver the repaired or replaced Product or parts to
the Buyer. Any warranty of AMETEK will not apply if the Buyer is in default under the Purchase Order Agreement
or where the Product, or any part thereof, is as follows:
•damaged by misuse, accident, negligence or failure to maintain the same as specified or required by
AMETEK;
•damaged by modifications, alterations or attachments thereto which are not authorized by AMETEK;
•installed or operated contrary to the instructions of AMETEK;
•opened, modified, or disassembled in any way without AMETEK’s consent;
•used in combination with items, articles or materials not authorized by AMETEK.
The Buyer may not assert any claim that the Products are not in conformity with any warranty until the Buyer has
made all payments to AMETEK provided for in the Purchase Order Agreement.
PRODUCT RETURN PROCEDURE
Request a Return Material Authorization (RMA) number from the repair facility (must be done in the country in
which it was purchased):
•In the USA, contact the AMETEK Customer Service Department prior to the return of the product
to AMETEK for repair:
Telephone: [phone], ext. 2295 or ext. 2463 (toll free North America)
858-450-0085, ext. 2295 or ext. 2463 (direct)
•https://www.powerandtest.com/service-and-support/rma/rma-request-form.
When requesting an RMA, have the following information ready:
•Model number
•Serial number
•Description of the problem
NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
NOTE: A returned product found upon inspection by AMETEK to be in specification is subject to an evaluation fee
and applicable freight charges.

VTI Instruments
6 EMX-75XX Preface
GENERAL SAFETY INSTRUCTIONS
Review the following safety precautions to avoid bodily injury and/or damage to the product.
These precautions must be observed during all phases of operation or service of this product.
Failure to comply with these precautions, or with specific warnings elsewhere in this manual,
violates safety standards of design, manufacture, and intended use of the product.
Service should only be performed by qualified personnel.
TERMS AND SYMBOLS
These terms may appear in this manual:
WARNING
Indicates that a procedure or condition may cause bodily injury or death.
CAUTION
Indicates that a procedure or condition could possibly cause damage to
equipment or loss of data.
These symbols may appear on the product:
ATTENTION - Important safety instructions
Frame or chassis ground
Indicates that the product was manufactured after August 13, 2005. This mark is
placed in accordance with EN 50419, Marking of electrical and electronic
equipment in accordance with Article 11(2) of Directive 2002/96/EC (WEEE).
End-of-life product can be returned to VTI by obtaining an RMA number. Fees
for takeback and recycling will apply if not prohibited by national law.
WARNINGS
Follow these precautions to avoid injury or damage to the product:
Use Proper Power Cord
To avoid hazard, only use the power cord specified for this product.
Use Proper Power Source
To avoid electrical overload, electric shock, or fire hazard, do not
use a power source that applies other than the specified voltage.
Power Consumption
Prior to using these cards, it is imperative that the power
consumption of all cards that will be installed in the mainframe be
calculated on all power supply rails. Failure to do so may result in
damaging the switch card and the mainframe.

www.vtiinstruments.com
EMX-75XX Preface 7
WARNINGS (CONT.)
Avoid Electric Shock
To avoid electric shock or fire hazard, do not operate this product
with the covers removed. Do not connect or disconnect any cable,
probes, test leads, etc. while they are connected to a voltage source.
Remove all power and unplug unit before performing any service.
Service should only be performed by qualified personnel.
Ground the Product
This product is grounded through the grounding conductor of the
power cord. To avoid electric shock, the grounding conductor must
be connected to earth ground.
Operating Conditions
To avoid injury, electric shock or fire hazard:
-
Do not operate in wet or damp conditions.
-
Do not operate in an explosive atmosphere.
-
Operate or store only in specified temperature range.
-
Provide proper clearance for product ventilation to prevent
overheating.
-
DO NOT operate if any damage to this product is suspected.
Product should be inspected or serviced only by qualified
personnel.
Improper Use
The operator of this instrument is advised that if the equipment is
used in a manner not specified in this manual, the protection
provided by the equipment may be impaired.
Conformity is checked by inspection.

www.vtiinstruments.com
EMX-75XX Index 9
SECTION 1
INTRODUCTION
OVERVIEW
The EMX-75XX Series is a family of high-performance PXIe modules consisting of multiple I/O
configurations and logic levels. Dedicated input or output cards are available for high channel
count applications while other cards provide ultimate flexibility with eight, 8-bit ports (64
channels) that can be configured as an input or output under programmatic control.
FEATURES
Models capable of sinking 300 mA include built-in clamping diodes, making these modules ideal
for driving and sensing external devices such as relays, while all clamping diodes and open
collector channels can be pulled up internally, rather than on a per channel basis, simplifying
overall system cabling.Isolated models are also available for more demanding applications.
PREPARATION FOR USE
UNPACKING
When an EMX-75XX Series module is unpacked from its shipping carton, the contents should
include the following items:
•An EMX-7510/EMX-7511/EMX-7512/EMX-7513/EMX-7514/EMX-7515/EMX-7519
All components should be immediately inspected for damage upon receipt of the unit. ESD
precautions should be observed while unpacking and installing the instrument into a PXI Express
chassis. The part number, model number, and serial number can be found on the side cover of the
card as shown below.
Figure 3-1: Serial Number Location

VTI Instruments
10 EMX-75XX Index
INSPECTING THE EMX-75XX SERIES
The EMX-7510/EMX-7511/EMX-7512/EMX-7513/EMX-7514/EMX-7515/ EMX-7519 modules
were carefully inspected both mechanically and electrically before shipment. They should be free
of marks or scratches and they should meet their published specifications upon receipt. If the
module was damaged in transit, do the following:
•Save all packing materials
•File a claim with the carrier
•Call a VTI Instruments sales and service office
INSTALLATION
INSTALL EMX-75XX
1. Set up the PXI Express chassis. See the Chassis’ Installation Guide for assistance.
2. Make sure the PXI Express chassis is powered off.
3. Select a PXIe slot or a hybrid slot in the PXI Express chassis for the EMX-75XX and insert it
carefully.
4. After the EMX-75XX is inserted all the way, secure it with the screws at the top and bottom
of the EMX-75XX front panel.
STORAGE AND SHIPMENT
STORING INSTRUMENTS
Store the module in a clean, dry, and static-free environment. For other requirements, see storage
and transport restrictions in Specification.
TRANSPORTING INSTRUMENTS
Package the module using the original factory packaging or packaging identical to the factory
packaging. Containers and materials identical to those used in factory packaging are available
through VTI Instruments offices. If returning the module to VTI Instruments for service, contact a
VTI Service Center to set up an RMA. The following information will be required:
•Serial number
•Model number
•Type of service required
•Return address
•If applicable, a description of the problem that is being encountered which provides specific
detail relating the instrument being returned.
In any correspondence, refer to the serial number and RMA number. Mark the container
“FRAGILE” to ensure careful handling. If it is necessary to package the module in a container
other than the original packaging, observe the following (although use of other packaging material
is not recommended):
1. Wrap the module in heavy paper or anti-static plastic
2. Protect the front panel with cardboard
3. Use a double-wall carton made of at least 350 lbs test material
4. Cushion the module to prevent damage

www.vtiinstruments.com
EMX-75XX Index 11
ORDERING INFORMATION
Sl.no.
Model
Part no.
Configuration
1
EMX-7510
70-0409-190
64-CH DIO, Source/Sink, 60 V max Static I/O
2
EMX-7511
70-0409-401
64-CH, DIO TTL, Static I/O
3
EMX-7512
70-0409-402
64-CH, DIO LV TTL, Static I/O
4
EMX-7513
70-0674-000
32DI/32DO, Source/Sink, 60 V max, Isolated Static I/O
5
EMX-7514
70-0672-000
64 DO, Source/Sink, 60 V max, Isolated Static
6
EMX-7515
70-0673-000
64 DI, 60 V max, Isolated Static
7
EMX-7519
70-0409-400
64-CH DO, Source/Sink, 60 V max Static
TABLE 1-1: EMX-75XX CARDS
SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Data Card Specifications
EMX-7510
Digital Input
Channels
64 (Eight 8-Bit Ports)
VIN (high)
>40% of VCLAMP
VIN (low)
<16% of VCLAMP
VIN (max)
60 V
Data Output
Characteristics
VOUT (high)
>2 V to 60 V
VOUT (low)
<1.5 V @ 300mA
Voltage Range
Internal Voltage Source
(VCLAMP)
3.3 V, 5.0 V, 12.0, V, and 24.0 V
User Voltage (VCLAMP)
>2 V up to 60 V
Connector Type
ERNI 160-Pin
Modes
Immediate
Inputs and outputs read and written via software
control
EMX-7511
Digital
Input/Output
Channels
64 (Eight 8-Bit Ports)
Logic Levels
Standard TTL @ 24mA sink/source
EMX-7512
Digital
Input/Output
Channels
64 (Eight 8-Bit Ports)
Logic Levels
Standard LV TTL @ 24mA sink/source
EMX-7513
Digital Input
Channels
32
Logical High
2.8 V to 60 V
Logical Low
< 2 V
Isolation to Computer GND
1000 V
Digital Output
Channels
32
Sink/Source
up to 100 mA, 60 V (AC/DC)
Potential Free
Yes
Isolation to Computer GND
1000 V
Connector Type
ERNI 160-Pin
EMX-7514
Digital Output
Channels
64
Sink/Source
up to 100 mA, 60 V (AC/DC)
Potential Free
Yes
Isolation to Computer GND
1000 V

VTI Instruments
12 EMX-75XX Index
Data Card Specifications
Connector Type
ERNI 160-Pin
EMX-7515
Digital Input
Channels
64
Logical High
2.8 V to 60 V
Logical Low
< 2 V
Isolation to Computer GND
1000 V
Connector Type
ERNI 160-Pin
EMX-7519
Data Output
Characteristics
Channels
64 (Eight 8-Bit Ports)
VOUT (high)
>2 V to 60 V
VOUT (low)
<1.5 V @ 300mA
Voltage Range
Internal Voltage Source
(VCLAMP)
3.3 V, 5.0 V, 12.0, V, and 24.0 V
User Voltage (VCLAMP)
>2 V up to 60 V
Connector Type
ERNI 160-Pin
Modes
Immediate
Outputs are written via software control
TABLE 1-2: TECHNICAL SPECIFICATIONS
ENVIRONMENTAL SPECIFICATIONS
Data Card Specifications
Operating Environment
Operating Temperature
0°C to +50 °C
Storage Environment
Storage Temperature
-40°C to +71°C
Relative Humidity, Non Condensing
5% to 95 %
Altitude
4600 m
TABLE 1-3: ENVIRONMENTAL SPECIFICATIONS

www.vtiinstruments.com
EMX-75XX Index 13
SECTION 2
EMX-7510, 64-CHANNEL,DIGITAL I/O CARD
The EMX-7510 is a high-performance Digital I/O module with eight ports of 8 bits (64 channels) each. Each 8-bit
port may be configured as an Input or Output under program control. In order to ease overall system cabling, all
clamping diodes and open collector channels are pulled up internally, rather than on a per-channel basis. Each
channel can sink 300 mA, and includes built-in clamping diodes, making this module ideal for driving and sensing
external devices such as relays.
P2
J3
FPGA
J4
PXIe Back
Panel conn Front panel
conn
DIO +
Output
Buffer
Input Buffer
GND_S
DATAx.y
330 Ω499 Ω100 kΩ
Channel Control
Over-Current
Detect
User
Voltage
ESD
GND_S
Configuration
Buffer
3V7DC
5VDC
12VDC
24VDC
INT_V_0
Input
Comparator
VCLAMP
USER
INTERNAL
RINPUT
201 k
3.7V LV
Emulation 5V TTL Emulation
R1A R1B R1C
RUSER
FIGURE 1-1: VOLTAGE OUTPUT _EMX-7510
FIGURE 1-2: EMX-7510 FRONT PANEL CONNECTOR DETAILS

VTI Instruments
14 EMX-75XX Index
Measurement Performance
This section discusses tips and procedures that can help maximize the actual performance realized with the EMX-
7510 and aid the user in avoiding some common pitfalls associated with making measurements.
Warm-up Time
As the EMX-7510 doesn't require calibration and there are no adjustments for the instrument to meet its published
specifications, there is no warm up required.
Voltage Outputs
A channel output is pulled to the configured voltage through a pull-up resistor. The actual output that will be seen by
the unit under test is defined by the standard voltage divider equation:








+
=)||(||
1
0INPUTUSER
INPUTUSER
CLAMP RRR RR
VV
Where,
V0is the output voltage
VCLAMP is the User configured voltage
R1is the internal pull-up resistor
RUSER is the external load presented by the unit under test
In normal mode, R1is 100 kΩ. In TTL emulation mode, R1is 499 Ωand in LV emulation mode, R1 is 330 Ω. So the
pull-up to VCLAMP is much stronger. TTL emulation mode is available for the 3.3 V and 5 V voltage levels.
If voltages higher than those provided by the equation above are desired, the User can supply a voltage with an
external power supply in conjunction with a low-value pull-up resistor to get closer to the user’s VCLAMP voltage. The
300 mA sink capability of the channel still must be observed.
Voltage Output
Mode
Internal Supply
Pull-Up (RX)
Open Circuit V0
Normal
24 V
100 kΩ (R3)
~15.84 V
Normal
12 V
100 kΩ (R3)
~7.92 V
Normal
5 V
100 kΩ (R3)
~3.3 V
Normal
3.3 V
100 kΩ (R3)
~2.47 V
TTL Emulation
5 V*
499 Ω (R2)
~4.64 V
LV Emulation
3.7 V*
330 Ω (R1)
~3.34 V
*For TTL and LV modes, there is approximately a 0.35 V drop due to the Schottky diode, resulting in an actual internal
supply voltage of 4.65 V and 3.35V, respectively.
Mode
External Supply
Load
VO-USER
Normal
VCLAMP
RUSER
( )






+ INPUTUSER
INPUTUSER
CLAMP RRk RR
V||100 ||
TABLE 1-1: EMX-7510 OUTPUT VOLTAGES

www.vtiinstruments.com
EMX-75XX Index 15
Connector Pin/Signal Assignment
The connector pins and their signal assignments are shown below . For mating connector and
accessory information, please see Appendix C.
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
A1
GND_S
B1
GND_C
C1
GND_S
D1
E1
A2
GND_S
B2
GND_S
C2
GND_S
D2
E2
GND_S
A3
DATA1.4
B3
GND_S
C3
DATA1.8
D3
GND_S
E3
DATA1.5
A4
DATA1.1
B4
GND_S
C4
DATA1.2
D4
GND_S
E4
DATA1.6
A5
DATA1.3
B5
GND_S
C5
DATA1.7
D5
GND_S
E5
DATA2.5
A6
DATA2.4
B6
DATA2.1
C6
DATA2.8
D6
GND_S
E6
DATA2.2
A7
GND_S
B7
GND_S
C7
GND_S
D7
DATA2.3
E7
GND_S
A8
GND_S
B8
GND_S
C8
GND_S
D8
GND_S
E8
DATA2.6
A9
DATA2.7
B9
USER_V2
C9
DATA3.8
D9
GND_S
E9
DATA3.5
A10
DATA3.4
B10
GND_S
C10
DATA3.1
D10
USER_V1
E10
GND_S
A11
DATA3.2
B11
GND_S
C11
DATA3.7
D11
GND_S
E11
DATA3.6
A12
DATA3.3
B12
GND_S
C12
DATA4.2
D12
GND_S
E12
DATA4.4
A13
GND_S
B13
USER_V4
C13
GND_S
D13
GND_S
E13
DATA4.5
A14
GND_S
B14
GND_S
C14
GND_S
D14
GND_S
E14
DATA4.8
A15
DATA4.1
B15
GND_S
C15
DATA4.7
D15
GND_S
E15
GND_S
A16
DATA4.3
B16
USER_V3
C16
DATA5.1
D16
GND_S
E16
GND_S
A17
DATA5.3
B17
GND_S
C17
DATA5.2
D17
USER_V6
E17
DATA4.6
A18
DATA5.8
B18
GND_S
C18
DATA5.4
D18
GND_S
E18
DATA5.5
A19
GND_S
B19
GND_S
C19
GND_S
D19
GND_S
E19
DATA5.7
A20
GND_S
B20
USER_V5
C20
GND_S
D20
GND_S
E20
DATA5.6
A21
DATA6.4
B21
GND_S
C21
DATA6.5
D21
GND_S
E21
GND_S
A22
DATA6.1
B22
GND_S
C22
DATA6.8
D22
GND_S
E22
GND_S
A23
DATA6.3
B23
GND_S
C23
DATA6.2
D23
GND_S
E23
DATA6.6
A24
DATA7.4
B24
USER_V7
C24
DATA7.1
D24
USER_V8
E24
DATA6.7
A25
GND_S
B25
GND_S
C25
GND_S
D25
GND_S
E25
DATA7.8
A26
GND_S
B26
GND_S
C26
GND_S
D26
GND_S
E26
DATA7.5
A27
DATA7.3
B27
GND_S
C27
DATA7.6
D27
GND_S
E27
GND_S
A28
DATA7.2
B28
GND_S
C28
DATA7.7
D28
GND_S
E28
GND_S
A29
DATA8.4
B29
GND_S
C29
DATA8.1
D29
GND_S
E29
DATA8.5
A30
DATA8.2
B30
GND_S
C30
DATA8.6
D30
GND_S
E30
DATA8.8
A31
GND_S
B31
GND_C
C31
GND_S
D31
GND_S
E31
GND_S
A32
DATA8.3
B32
GND_S
C32
DATA8.7
D32
GND_S
E32
GND_S
TABLE 1-2: EMX-7510 CONNECTOR PIN SIGNAL ASSIGNMENT

VTI Instruments
16 EMX-75XX Index
EMX-7510 SPECIFICATIONS
GENERAL SPECIFICATIONS
CHANNEL COUNT
64 Digital Input / Output channels (Eight 8-Bit Ports)
DATA INPUT CHARACTERISTICS
VIN (high)
VIN (low)
VIN (max)
> 40% of Vclamp (Typical)
< 16% of Vclamp (Typical)
60 V
DATA OUTPUT CHARACTERISTICS
VOUT (high)
VOUT (low)
> 2 V to 60 V
< 1.5 V @ 300 mA (Sink)
VOLTAGE RANGE
Internal voltage source
User
3.3 V, 5.0 V, 12.0 V, and 24.0 V
> 2 V up to 60 V
MODES
Immediate (Normal)
Inputs and outputs read and written via software control
DATA INPUT CLOCK SOURCES
Internal clock
THEORY OF OPERATION
This section provides an overview of how the EMX-7510 works. The figure below shows this
process.
FIGURE 1-3: EMX-7510 BLOCK DIAGRAM

www.vtiinstruments.com
EMX-75XX Index 17
Overview
The EMX-7510 supports a static mode where user-driven software commands execute
reading/writing data channels on a per port basis. Each port can be programmed for direction and
polarity. The default direction is input and default polarity is normal. Ports also need a voltage
reference before data can be read or written; this voltage is used for pulling up open drain data
lines and setting reference voltage for threshold detection in input path. No voltage should be
applied on data lines before voltage selection and during voltage configuration process. User can
select a voltage from 3.3 V, 5 V, 12 V or 24 V provided on the module or supply a voltage
through front panel connector, to be used as VCLAMP. By default, no voltage is selected and data
lines are floating. There is also an option of configuring a port’s voltage setting as either TTL or
Low Voltage emulation. In TTL emulation setting, open drain lines are pulled up to 5 V and have
a sourcing capability of 4 mA, whereas in Low Voltage (LV) option the pull-up voltage is 3.3 V
with 4 mA drive strength.
When doing read and writes, data written to a port set for output updates data on that port, data
written to a port set for input does not have any effect. Data read from a port always reads current
status of data pins (whether driven by card or by user).
When a port’s direction is output, data is driven by the DIO on the corresponding channels and no
user voltage should be applied on those channels. When direction is input, data lines are pulled up
to VCLAMP using 100 kΩ resistor and user can drive their data on the channels with a VIN range of
zero to VCLAMP.
TTL and LV emulation voltage selection is only applicable when port’s direction is output. Input
mode will not be allowed for emulation voltage.
Power on Reset
Power on Reset / Soft Reset of EMX-7510 brings the ports to a default state as in Table 2-3.
Model
Direction
Polarity
Data
Voltage
EMX-7510
Input
Normal
0xFF
(Internal Pull up)
0V
TABLE 1-3: RESET CONDITION
Voltage Configuration
•When the card is reset, no Voltage will be selected at the ports and data in output registers are
set to FF.
•A ports output register data is set to FF for any voltage configuration. Only concerned port is
affected.
•A port’s direction is changed to output, when its voltage is set for TTL/LV emulation. Only
concerned port is affected.
Data in output registers is retained if direction is changed. So for example, when an output port
that is driving AA on data lines is made input, all its channels are pulled up so that user data can
be driven but when the direction is changed back to output, AA gets driven, given that polarity and
voltage setting didn’t change.
Polarity settings are applicable irrespective of direction. On output channels, changing the polarity
flips the state of data lines and further writes are done according to polarity selection (for example,
if polarity is configured as reversed then writing 1 to a channel writes a 0 to it and vice versa).
Read back of data, whether driven by card when direction is output or driven by user when

VTI Instruments
18 EMX-75XX Index
direction is input, also checks for polarity and if polarity is reversed, 1 is read as 0, otherwise as 1
and 0 is read as 1, otherwise as 0.
Configuration Section
This section of circuit is used to select reference voltage (VCLAMP) for ports. Each port has a set of
programmatically controlled switches that let the user select a voltage from 3.3 V, 5 V, 12 V, 24 V
and User supplied voltage, which can be anywhere from 3.3 V to 60 V. In addition, LV and TTL
emulation modes can be selected which use 3.3 V and 5 V as VCLAMP respectively, and insert a low
impedance pull-up resistor in the path to source 4 mA.
Output Section
The output section of each channel consists of an N-channel MOSFET, pull-up resistors and over
current sense circuitry. When a 1 is driven on channel, the MOSFET is turned off and data line is
pulled-up to VCLAMP using appropriate pull-up resistor (330 Ω for LV emulation, 500 Ω for TTL
emulation and 100 kΩ otherwise). The rising voltage level at data channel exhibits RC charging
with a rise time of approximately 70 μs with 100 kΩ pull-up resistor and about 600 ns with low
impedance pull-up in TTL and LV voltage configurations. When a 0 is driven on channel, the
MOSFET is turned on and data line is connected to ground via a current sense resistor of 0.3 Ω.
The falling edge is much sharper with a maximum fall time of 300 ns approximately. Please refer
to electrical characteristics for output voltage levels with different load resistance.
The load resistor and pull-up resistor form a voltage divider of VCLAMP and determine output
voltage, thus output voltage decreases with decreasing load resistance. The minimum load
resistance that can be connected on channels is 500 Ω for LV emulation, 750 Ω for TTL emulation
and 150 kΩ otherwise.
The data lines have a current sinking capacity of 300 mA. If the current through MOSFET
increases above limited value, the over current protection circuit turns off all FETs in the
concerned port. The over current condition must last for greater than 12.8 µs before over current
protection circuit is activated. This is done to prevent false over current events due to transients. It
takes approximately 20 µs from first occurrence of the over current event before the FETs are
turned off. The over current circuit will activate with 340 mA hold current and 475 mA trip
current, where hold current is the maximum current circuit will allow without tripping and trip
current is the minimum current required to trip the circuit. The absolute maximum limit on sinking
current is 500 mA. Staying within these limits is user’s responsibility. Over current readings from
ports will be latched and can be read by user. When they reset over current condition then port will
be enabled and data last written to port will be applied on channels.
Input Section
The input section converts the high or low voltage reading on the data channels to 1 or 0 that can
be read by the user. The port’s VCLAMP voltage is used as a reference for threshold detection. When
the port is set as input, the data lines are pulled up using 100 kΩ resistor. If voltage on data line is
greater than 40% of port’s VCLAMP voltage, 1 is read and if voltage on data line is less than 16% of
port’s VCLAMP voltage, 0 is read. Hysteresis loop is implemented on input comparison meaning
that on rising voltage, level has to cross higher threshold (VIH) to record a 1 and on falling
voltage, level has to cross lower threshold (VIL) to record a 0. In between VIH and VIL the digital
state of data channel reading stays the same. Please refer to the recommended operating conditions
for input threshold values.
The input section also has a fly-back protection diode. The port’s reference voltage VCLAMP is
routed to the cathode of a fly-back protection diode, whose anode is then connected to the
associated port’s data line. Every data line has a diode installed to suppress transients in case of
voltage overshooting. The current through diode must be limited as indicated in absolute
maximum ratings.

www.vtiinstruments.com
EMX-75XX Index 19
TTL/LV Emulation Sourcing Current Typical connection
P2
J3
FPGA
J4
PXIe Back
Panel conn Front panel
conn
DIO +
Output
Buffer
Input Buffer
GND_S
DATAx.y
330 Ω499 Ω100 kΩ
Channel Control
Over-Current
Detect
User
Voltage
ESD
GND_S
Configuration
Buffer
3V7DC
5VDC
12VDC
24VDC
INT_V_0
Input
Comparator
VCLAMP
USER
INTERNAL
RINPUT
201 k
3.7V LV
Emulation 5V TTL Emulation
R1A R1B R1C
RUSER
FIGURE 1-4: TTL/LV EMULATION SOURCING CURRENT TYPICAL CONNECTION
Sinking Current Typical connection
P2
J3
FPGA
J4
PXIe Back
Panel conn Front panel
conn
DIO +
Output
Buffer
Input Buffer
GND_S
DATAx.y
330 Ω499 Ω100 kΩ
Channel Control
Over-Current
Detect
User
Voltage
ESD
GND_S
Configuration
Buffer
3V7DC
5VDC
12VDC
24VDC
INT_V_0
Input
Comparator
VCLAMP
USER
INTERNAL
RINPUT
201 k
3.7V LV
Emulation 5V TTL Emulation
R1A R1B R1C
User
Voltage
FIGURE 1-5: SINKING CURRENT TYPICAL CONNECTION

VTI Instruments
20 EMX-75XX Index
EMX-7511, 64-CHANNEL,DIGITAL I/O TTLCARD
The EMX-7511 is a high-performance I/O module with eight ports of 8 bits (64 channels) each
with standard TTL voltage levels. Each 8-bit port may be configured as an Input or Output under
program control.
BLOCK DIAGRAM
FIGURE 1-6: EMX-7511BLOCK DIAGRAM
FIGURE 1-7: EMX-7511FRONT PANEL CONNECTOR DETAILS