Measurement Computing PCI-DUAL-AC5 User manual

PCI-DUAL-AC5
High Output Digital I/O Board
User’s Guide
Document Revision 3, July, 2005
© Copyright 2005, Measurement Computing Corporation

Your new Measurement Computing product comes with a fantastic extra —
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Refer to www.mccdaq.com/execteam.html for the names, titles, and contact information of each key executive at
Measurement Computing.
Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now
enjoy the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our
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To offer the highest-quality, computer-based data acquisition, control, and GPIB hardware and software available—
at the best possible price.
To offer our customers superior post-sale support—FREE. Whether providing unrivaled telephone technical and
sales support on our latest product offerings, or continuing that same first-rate support on older products and
operating systems, we’re committed to you!
Lifetime warranty: Every hardware product manufactured by Measurement Computing Corporation is warranted
against defects in materials or workmanship for the life of the product. Products found defective are repaired or replaced
promptly.
Lifetime Harsh Environment Warranty®: We will replace any product manufactured by Measurement Computing
Corporation that is damaged (even due to misuse) for only 50% of the current list price. I/O boards face some tough
operating conditionssome more severe than the boards are designed to withstand. When a board becomes damaged, just
return the unit with an order for its replacement at only 50% of the current list price. We don’t need to profit from your
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These warranties are in lieu of all other warranties, expressed or implied, including any implied warranty of
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special, incidental or consequential damage arising from the use of its products, even if Measurement Computing
Corporation has been notified in advance of the possibility of such damages.
ii
HM PCI-DUAL-AC5.doc

Trademark and Copyright Information
TracerDAQ, Universal Library, InstaCal, Harsh Environment Warranty, Measurement Computing Corporation, and the
Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation.
SoftWIRE is a registered trademark of SoftWIRE Technology, Inc.
Windows, Microsoft, and Visual Studio are either trademarks or registered trademarks of Microsoft Corporation
LabVIEW is a trademark of National Instruments.
All other trademarks are the property of their respective owners.
Information furnished by Measurement Computing Corporation is believed to be accurate and reliable. However, no
responsibility is assumed by Measurement Computing Corporation neither for its use; nor for any infringements of patents
or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any
patent or copyrights of Measurement Computing Corporation.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form
by any means, electronic, mechanical, by photocopying, recording, or otherwise without the prior written permission of
Measurement Computing Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product
for use in life support systems and/or devices without the written approval of the CEO of Measurement
Computing Corporation. Life support devices/systems are devices or systems which, a) are intended for
surgical implantation into the body, or b) support or sustain life and whose failure to perform can be
reasonably expected to result in injury. Measurement Computing Corporation products are not designed with
the components required, and are not subject to the testing required to ensure a level of reliability suitable for
the treatment and diagnosis of people.
iii

Table of Contents
Preface
About this User's Guide .......................................................................................................................v
What you will learn from this user's guide.........................................................................................................v
Conventions in this user's guide .........................................................................................................................v
Where to find more information........................................................................................................................vi
Chapter 1
Introducing the PCI-DUAL-AC5 ....................................................................................................... 1-1
Overview: PCI-DUAL-AC5 features ............................................................................................................. 1-1
Software features............................................................................................................................................ 1-1
Block diagram ................................................................................................................................................ 1-2
Chapter 2
Installing the PCI-DUAL-AC5 ........................................................................................................... 2-1
What comes with your PCI-DUAL-AC5 shipment?...................................................................................... 2-1
Standard components..................................................................................................................................................... 2-1
Optional components ..................................................................................................................................................... 2-2
Unpacking the board ...................................................................................................................................... 2-2
Installing the software .................................................................................................................................... 2-3
Installing the hardware ................................................................................................................................... 2-3
Connecting the board for I/O operations ........................................................................................................ 2-3
Connectors, cables – main I/O connector ...................................................................................................................... 2-3
Pinout – main I/O connector .......................................................................................................................................... 2-4
Field wiring and signal termination ............................................................................................................................... 2-5
Chapter 3
Programming and Developing Applications .................................................................................. 3-1
Programming languages ................................................................................................................................. 3-1
Packaged applications programs .................................................................................................................... 3-1
Register-level programming ........................................................................................................................... 3-1
Chapter 4
Functional Details ............................................................................................................................. 4-1
PCI-DUAL-AC5 to SSR-PB24 rack connections .......................................................................................... 4-1
82C55 emulation ............................................................................................................................................ 4-1
Pull-up and pull-down resistors ..................................................................................................................................... 4-2
TTL to solid state relays ................................................................................................................................................ 4-3
Chapter 5
Specifications.................................................................................................................................... 5-1
Power consumption ........................................................................................................................................ 5-1
Digital Input / Output ..................................................................................................................................... 5-1
Environmental ................................................................................................................................................ 5-1
Mechanical ..................................................................................................................................................... 5-1
Main connector and pin out............................................................................................................................ 5-2
iv

Preface
About this User's Guide
What you will learn from this user's guide
This user's guide explains how to install, configure, and use the PCI-DUAL-AC5 board so that you get
the most out of its digital I/O features.
This user's guide also refers you to related documents available on our web site, and to technical support
resources.
Conventions in this user's guide
The following conventions are used in this manual to convey special information:
For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you
are reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and
others, damaging your hardware, or losing your data.
< # : # > Angle brackets that enclose numbers separated by a colon signify a range of numbers, such those
assigned to registers, bit settings, etc.
bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check
boxes. For example:
1. Insert the disk or CD and click the OK button.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or
phrase. For example:
The InstaCal installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board.
v

PCI-DUAL-AC5 User's Guide About this User's Guide
Where to find more information
The following electronic documents provide helpful information relevant to the operation of the PCI-
DUAL-AC5.
MCC's Specifications: PCI-DUAL-AC5 (the PDF version of Chapter 6 in this guide) is available on
our web site at www.mccdaq.com/pdfs/PCI-DUAL-AC5.pdf.
MCC's Register Map for the PCI-DUAL-AC5 Series is available on our web site at
www.mccdaq.com/registermaps/RegMapPCI-DUAL-AC5.pdf
MCC's Quick Start Guide is available on our web site at www.mccdaq.com/PDFmanuals/DAQ-
Software-Quick-Start.pdf.
MCC's Guide to Signal Connections is available on our web site at
www.mccdaq.com/signals/signals.pdf.
MCC's Universal Library User's Guide is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf.
MCC's Universal Library Function Reference is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-functions.pdf.
MCC's Universal Library for LabVIEW™User’s Guide is available on our web site at
www.mccdaq.com/PDFmanuals/SM-UL-LabVIEW.pdf.
This user's manual is also available on our web site at www.mccdaq.com/PDFmanuals/PCI-DUAL-
AC5.pdf.
vi

Chapter 1
Introducing the PCI-DUAL-AC5
Overview: PCI-DUAL-AC5 features
The PCI-DUAL-AC5 is a 48-bit, high output, digital I/O board for PCI-compatible computers. Primarily
designed as a direct interface to the industry-standard SSR-PB24 rack, the board is also highly useful as a
general purpose digital I/O board.
The 48-bits of digital I/O are organized into two 24-bit groups based on an 82C55 mode 0 emulation (no
strobed I/O or bi-directional I/O bits). Each 24-bit group is divided into three eight-bit ports labeled
PORTA, PORTB and PORTC. PORTC can be split into two four-bit nibbles — Port C-HI and Port C-
LO. Each of these ports may be individually programmed as input or output.
All inputs and outputs are TTL compatible. The digital output drivers are 74S244 chips that can sink
64 mA and source 15 mA. The input buffers are 74LS373 chips and have standard high input impedance
of the 74LS series devices. All I/O is brought out to a 100-pin connector, which also allows connection to
the PC’s +5 Volt and Ground.
On power up and reset, all I/O bits are set to input mode. If you are using the board to control items that
must be OFF on reset, install pull-down resistors. Each board is equipped with open locations where you
can install SIP resistor networks for either pull-up or pull-down.
The PCI-DUAL-AC5 board is completely plug-and-play, with no jumpers or switches to set. All board
addresses and interrupt sources are set by the board's plug-and-play software. Board configuration is
controlled by your system's BIOS.
Software features
The following software ships with the PCI-DUAL-AC5 free of charge.
InstaCal installation, calibration, and test utility
TracerDAQ™ suite of virtual instruments
SoftWIRE® for Visual Studio® .NET graphical programming
MCC DAQ Components for VS .NET (installed with SoftWIRE® for VS .NET)
For information on the features of InstaCal, TracerDAQ, and SoftWIRE, refer to the Quick Start Guide
booklet that shipped with the PCI-DUAL-AC5.
1-1

PCI-DUAL-AC5 User's Guide Introducing the PCI-DUAL-AC5
Block diagram
PCI-DUAL-AC5 functions are illustrated in the block diagram shown here.
PCI
Controller BADR2
Boot
EEPROM
Control
Registers
Decode/Status
Bus
Timing
Controller FPGA and Logic
Local Bus
PCI Bus (5V, 32-bit, 33 MHZ)
Control Bus
Port A
Port B
Control
A(7:0)
B(7:0)
Port C
C(7:0)
Port A
Port B
Control
A(7:0)
B(7:0)
Port C
C(7:0)
SSR-PB24SSR-PB24
AC/DC
AC/DC
I/O Module
Racks
1-2

Chapter 2
Installing the PCI-DUAL-AC5
What comes with your PCI-DUAL-AC5 shipment?
As you unpack your board, make sure each of the items shown below is included:
Standard components
The following items should be included with your shipment:
PCI-DUAL-AC5 board
Software
The Measurement Computing Data Acquisition Software CD contains the following software:
InstaCal installation, calibration, and test utility
TracerDAQ suite of virtual instruments
SoftWIRE for VS .NET
SoftWIRE MCC DAQ Components for .NET
Documentation
In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF
at www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf). Please read this booklet completely
before installing any software and hardware.
2-1

PCI-DUAL-AC5 User's Guide Installing the PCI-DUAL-AC5
Optional components
You can also order the following MCC products to use with your PCI-DUAL-AC5.
Cables
C100FE-x
C100FF-x
Signal termination and conditioning accessories
MCC provides signal conditioning and termination products for use with the PCI-DUAL-AC5. Refer to
Field wiring and signal termination on page 2-5 for a complete list of compatible accessory products.
If any items are missing or damaged, notify Measurement Computing Corporation immediately by phone,
fax, or e-mail:
Phone: [phone] and follow the instructions for reaching Tech Support.
Fax: [phone] to the attention of Tech Support
Email: [e-mail]
Unpacking the board
The PCI-DUAL-AC5 board is shipped in an antistatic container to prevent damage by an electrostatic
discharge. To avoid such damage, perform the following procedure when unpacking and handling your
board.
1.
2.
3.
Before opening the antistatic container, ground yourself with a wrist-grounding strap or by holding
onto a grounded object (such as the computer chassis).
Touch the antistatic container to the computer chassis before removing the board from the container.
Remove the board from the container. Never touch the exposed pins or circuit connections on the
board.
If your board is damaged, notify Measurement Computing Corporation immediately by phone, fax, or
e-mail. For international customers, contact your local distributor where you purchased the board.
Phone: [phone] and follow the instructions for reaching Tech Support.
Fax: [phone] to the attention of Tech Support
Email: [e-mail]
2-2

PCI-DUAL-AC5 User's Guide Installing the PCI-DUAL-AC5
Installing the software
Install the software included with your board before you install the hardware. Installing the software first
ensures that the information required for proper board detection is installed and available at boot up.
Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing
Data Acquisition Software CD. This booklet is shipped with the hardware, and is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
Installing the hardware
The PCI-DUAL-AC5 board is completely plug-and-play. There are no switches or jumpers to set on the
board. Configuration is controlled by your system's BIOS. To install your board, follow the steps below.
Install the MCC DAQ software before you install your board
The driver needed to run your board is installed with the MCC DAQ software. Therefore, you need to
install this software before you install your board. Follow the directions for installing this software in the
Quick Start Guide that shipped with your board.
1.
2.
3.
Turn your computer off, open it up, and insert your board into an available PCI slot.
Close your computer and turn it on.
If you are using an operating system with support for plug-and-play (such as Windows 2000 or
Windows XP), a dialog box pops up as the system loads indicating that new hardware has been
detected. If the information file for this board is not already loaded onto your PC, you will be
prompted for the disk containing this file. The MCC DAQ software contains this file. If required,
insert the Measurement Computing Data Acquisition Software CD and click OK.
To test your installation and configure your board, run the InstaCal utility installed in the previous
section. Refer to the Quick Start Guide that came with your board for information on how to initially
set up and load InstaCal.
Connecting the board for I/O operations
Connectors, cables – main I/O connector
Table 2-1
Table 2-1. Board connector, cables, and accessory equipment
lists the board connectors, applicable cables, and compatible accessory products for the PCI-
DUAL-AC5.
Connector type 100-pin high-density Robinson-Nugent
Compatible cables C100FE-x
C100FF-x
Compatible accessory product with
the C100FE-x cable
SSR-PB24 (two required)
Compatible accessory products with
the C100FF-x cable
CIO-MINI50 (two required)
CIO-SPADE50 (two required)
CIO-TERM100
SCB-50
The PCI-DUAL-AC5 connector is accessible through the PCI slot expansion bracket. The connector is a
standard 100-pin header connector. If you are connecting to the SSR-PB24 or equivalent, we recommend
using the C100FE-x series cable. This cable splits the 100-pins into two edge-connectors which can
connect to two SSR-PB24 racks.
2-3

PCI-DUAL-AC5 User's Guide Installing the PCI-DUAL-AC5
If you need direct access to the digital I/O, use the C100FF-x series cables to connect two CIO-MINI50s,
an SCB-50 or a CIO-TERM100. These combinations bring all I/O connections out to convenient, easy-
to-use screw terminals
Information on signal connections
General information regarding signal connection and configuration is available in the Guide to Signal
Connections (available at www.mccdaq.com/signals/signals.pdf).
Pinout – main I/O connector
The I/O connector for the board is a 100-pin header connector accessible from the rear of the PC through
the expansion backplate. See for pin assignments.Figure 2-1
Figure 2-1. I/O connector pinout
Second Port C
First Port C
First Port B
GND
A0
C7 1
GND 2
C6 3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GND 18
B6 19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
A
6 35
GND 36
A
5 37
GND 38
A
4 39
GND 40
A
3 41
GND 42
A
2 43
GND 44
A
1 45
46
47
GND 48
49
GND 50
GND
C5
GND
C4
GND
C3
GND
C2
GND
C1
GND
C0
GND
B7
GND
B5
GND
B4
GND
B3
GND
B2
GND
B1
GND
B0
GND
A
7
GND
GND
A
0
51 C7
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90 GND
91 A3
92 GND
93
94
95 A1
96
97
98
99
100 GND
GND
C6
GND
C5
GND
C4
GND
C3
GND
C2
GND
C1
GND
C0
GND
B7
GND
B6
GND
B5
GND
B4
GND
GND
B2
GND
B1
GND
B0
GND
A7
GND
A6
GND
A5
GND
A4
A2
GND
GND
0ohm
5V
B3
0 ohm
5V.
Base + 0
Base + 2
Base + 1
Base + 4
Base + 5
Base + 6
First Port A
Second Port B
Second Port A
The connector accepts 100-pin connectors, such as on the C100FE-2, a 2-foot cable with two edge-
connectors, or the C-100FF-2, a two-foot cable with two 50-pin header connectors.
2-4

PCI-DUAL-AC5 User's Guide Installing the PCI-DUAL-AC5
Field wiring and signal termination
You can use the following screw terminal boards to terminate field signals and route them into the PCI-
DUAL-AC5 using the C100FF-x cable.
CIO-MINI50 – 50-pin universal screw terminal board. Two boards are required. Details on this
product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=102&pf_id=258.
CIO-SPADE50 — 16" x 4" termination panel which mates with both 37-pin and 50-pin connectors.
Two boards are required. Details on this product are available on our web site at
www.mccdaq.com/pdfs/screw.pdf.
CIO-TERM100 – 100-pin screw terminal board (daisy-chained 50-pin IDC connectors). Two boards
are required. Details on this product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=102&pf_id=281.
SCB-50 – 50 conductor, shielded signal connection/screw terminal box provides two independent
50-pin connections. Details on this product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=196&pf_id=1168.
You can use the following relay mounting rack with the C100FE-x cable to provide digital signal
conditioning.
SSR-PB24 – 24 channel solid-state relay mounting and interface rack. Details on this product are
available on our web site at www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=122&pf_id=619.
The PCI-DUAL-AC5 supports up to two SSR-PB24 boards (one cable required per SSR-PB24).
2-5

Chapter 3
Programming and Developing Applications
After following the installation instructions in Chapter 2, your board should now be installed and ready
for use. Software written at the register level for other models will not function correctly with your board.
Programming languages
Measurement Computing’s Universal Library® provides access to board functions from a variety of
Windows programming languages. If you are planning to write programs, or would like to run the
example programs for Visual Basicor any other language, please refer to the Universal Library User's
Guide (available on our web site at http://www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf).
Packaged applications programs
Many packaged application programs, such as SoftWIRE, Labtech Notebook™, and HP-VEE™, now
have drivers for your board. If the package you own does not have drivers for the board, please fax or e-
mail the package name and the revision number from the install disks. We will research the package for
you and advise how to obtain drivers.
Some application drivers are included with the Universal Library package, but not with the application
package. If you have purchased an application package directly from the software vendor, you may need
to purchase our Universal Library and drivers. Please contact us by phone, fax or e-mail:
Phone: [phone] and follow the instructions for reaching Tech Support.
Fax: [phone] to the attention of Tech Support
Email: [e-mail]
Register-level programming
You should use the Universal Library or one of the packaged application programs mentioned above to
control your board. Only experienced programmers should try register-level programming.
If you need to program at the register level in your application, refer to the Register Map for the PCI-
DUAL-AC5. This document is available on our website at www.mccdaq.com/registermaps/RegMapPCI-
DUAL-AC5.pdf.
3-1

Chapter 4
Functional Details
PCI-DUAL-AC5 to SSR-PB24 rack connections
The PCI-DUAL-AC5 board provides 48 bits of digital I/O. However, most popular relay and SSR boards
provide 24-bits of I/O. The PCI-DUAL-AC5 uses a dual-leg cable, C100FE-x to monitor and control
SSRs on two SSR-PB24 racks. The configuration is shown in Fi .gure 4-1
Figure 4-1. PCI-DUAL-AC5 to SSR-PB24 cabling
SSR-PB24
SSR-PB24
C100FE-#
PCI-DUAL-AC5
First Ports A, B, & C
Second Ports A, B, & C
The 24-bits of digital I/O on PCI-DUAL-AC5 connector pins 1-48 (base address +0 through +2) control
the first relay rack. The 24-bits of digital I/O on pins 51-98 (base address +4 through +6) control the
second SSR rack.
Figure 2-1 is a pin translation of pins 51 thru 100 of the C100FE-x or C100FF-x cable to the cable's
second 50-pin connector. The first 50 pins are a one-to-one relationship to the first 50-pin connector.
82C55 emulation
The PCI-DUAL-AC5 board emulates the 82C55 chip. The 82C55 emulation initializes all ports as inputs
on power-up and reset. A TTL input is a high impedance input. If you connect another TTL input device
to the output, it could be turned on or off every time the board is reset.
To establish a consistent TTL level at power-up, use resistors tied to either +5V (pull-up) or ground
(pull-down). There are open locations for pull-up and pull-down resistor packs on the board.
Whenever an 82C55 emulation is powered on or reset, all pins are set to high-impedance input. Based on
standard TTL functionality, these inputs will typically float high, and may have enough drive current to
turn on external devices.
4-1

PCI-DUAL-AC5 User's Guide Functional Details
Consequently, if you have output devices such as solid state relays, they may be switched on whenever
the computer is powered on or reset. To prevent unwanted switching, and to drive all outputs to a known
state after power on or reset, pull all pins either high or low through a 2.2 K resistor.
Pull-up and pull-down resistors
TTL inputs usually, but not reliably, float high. The direction they float is dependent on the
characteristics of the circuit and is unpredictable. This means that if devices such as solid state relays, are
driven by digital I/O pins, they can be switched on whenever the computer is powered-on or is reset. To
prevent unwanted switching at power-on or reset, force all digital I/O pins to a known state by pulling all
pins either high or low through a 2.2 K ohm resistor tied to either 5V or GND.
The pull-up resistor pulls the input to a high state (+5V) when the board is in input mode, as it would be
on power-up or reset. A 2.2 K ohm resistor draws only 2 mA. A grounded 2.2 K ohm pull-down resistor
pulls the I/O line low when the board is in input mode.
The SIP is made up of eight 2.2 K ohm resistors. One side of each resistor is connected to a single
common point and brought out to a pin. The common line is marked with a dot or line at one end of the
SIP. The remaining resistor ends are brought out to the other eight pins (refer to ).Figure 4-2
Figure 4-2. Eight-Resistor SIP Schematic
2.2 KOhm SIP
Dot
(LO or HI)
I/O Lines
The PCI-DUAL-AC5 board has open locations where you can install a 2.2 K ohm, eight-resistor single
inline package (SIP) resistor network for each port. The locations are adjacent to the I/O connector and
are marked PORT0A, PORT0B, and PORT0C, and PORT1A, PORT1B, and PORT1C.
When installed, the SIP establishes either a high or low logic level at each of the eight
I/O lines on the port. At each board location, A, B, and C, there are 10 holes in a line. The hole on one
end is marked "HI" and is connected to +5V. The other end is marked "LO" and is connected to GND.
The eight holes in the middle connect to eight lines of the port, A, B or C.
To pull-up lines, orient the SIP with the common pin (dot) toward the HI end; to pull-down, install the
resistor with the common pin in the LO end.
Figure 4-3 shows a schematic of an SIP installed in both the pull-up and pull-down positions.
4-2

PCI-DUAL-AC5 User's Guide Functional Details
2.2 K SIP installed for pull-up
2.2 K SIP Dot indicates the
common line
+5 VDC
HI
LO
(GND)
n7
User Connector Digital I/O Lines
n5
n4
n3
n2
n1
n0
n6
COM
Digital
I/O Port
n = A, B, or C
+5 VDC
2.2 K SIP installed for pull-down
2.2 K SIP
Dot indicates the
common line
HI
LO
(GND)
n7
User Connector
Digital I/O Lines
n5
n4
n3
n2
n1
n0
n6
COM
Digital
I/O Port
n = A, B, or C
Figure 4-3. Pull-up and pull-down resistor SIP schematic
We recommend using 2.2 K ohm SIPs (MCC part number SP-K2.29C). Use a different value only if
necessary.
Unconnected inputs float
Unconnected inputs typically float high, but not reliably. If you are using a PCI-DUAL-AC5 board for
input and have unconnected inputs, ignore the data from those lines. You do not have to terminate input
lines, and unconnected lines will not affect the performance of connected lines. Ensure that you mask out
any unconnected bits in software.
TTL to solid state relays
Many applications require digital outputs to switch AC and DC voltage motors on and off or to monitor
AC and high DC voltages. These AC and high DC voltages cannot be controlled or read directly by the
TTL digital lines of a PCI-DUAL-AC5.
Solid State Relays (SSRs) allow control and monitoring of AC and high DC voltages and provide 750 V
isolation. SSRs are the recommended method of interfacing to AC and high DC signals.
The most convenient way to use solid state relays and a PCI-DUAL-AC5 board is to purchase a Solid
State Relay Rack. The rack recommended for use with the PCI-DUAL-AC5 board is the SSR-PB24
from Measurement Computing Corporation.
4-3

Chapter 5
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Power consumption
Table 5-1. Power consumption specifications
+5V Operating 1.13 A typical, 1.80 A max
Digital Input / Output
Table 5-2. Digital I/O specifications
Digital type (main connector) 8255 mode 0 emulation
Output 74S244
Input 74LS373
Configuration 4 banks of 8, 4 banks of 4, programmable by bank as input or output
Number of channels 48 I/O
Output high 2.4 volts min @ -15 mA
Output low 0.5 volts max @ 64 mA
Input high 2.0 volts min, 7 volts absolute max
Input low 0.8 volts max, -0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
Miscellaneous Locations provided for installation of pull-up or pull-down resistors
Environmental
Table 5-3. Environmental specifications
Operating temperature range 0 to 70 °C
Storage temperature range -40 to 100 °C
Humidity 0 to 90% non-condensing
Mechanical
Table 5-4. Mechanical specifications
174.8 mm (L) x 106.7 mm (W) x 21.6 mm (H)
Card dimensions
6.88" (L) x 4.2" (W) x 0.85" (H)
5-1

PCI-DUAL-AC5 User's Guide Specifications
Main connector and pin out
Table 5-5. Main connector specifications
Connector type 100-pin high density
Compatible cables C100FE-x cable
C100FF-x cable
Compatible accessory products (with the C100FE-x cable) SSR-PB24 (2)
Compatible accessory products (with the C100FF-x cable) CIO-MINI50 (2)
CIO-SPADE50 (2)
CIO-TERM100 (1)
SCB-50 (1)
Table 5-6. Main connector pin out
Pin Signal name Pin Signal name
1 FIRSTPORTC Bit 7 51 SECONDPORTC Bit 7
2 GND 52 GND
3 FIRSTPORTC Bit 6 53 SECONDPORTC Bit 6
4 GND 54 GND
5 FIRSTPORTC Bit 5 55 SECONDPORTC Bit 5
6 GND 56 GND
7 FIRSTPORTC Bit 4 57 SECONDPORTC Bit 4
8 GND 58 GND
9 FIRSTPORTC Bit 3 59 SECONDPORTC Bit 3
10 GND 60 GND
11 FIRSTPORTC Bit 2 61 SECONDPORTC Bit 2
12 GND 62 GND
13 FIRSTPORTC Bit 1 63 SECONDPORTC Bit 1
14 GND 64 GND
15 FIRSTPORTC Bit 0 65 SECONDPORTC Bit 0
16 GND 66 GND
17 FIRSTPORTB Bit 7 67 SECONDPORTB Bit 7
18 GND 68 GND
19 FIRSTPORTB Bit 6 69 SECONDPORTB Bit 6
20 GND 70 GND
21 FIRSTPORTB Bit 5 71 SECONDPORTB Bit 5
22 GND 72 GND
23 FIRSTPORTB Bit 4 73 SECONDPORTB Bit 4
24 GND 74 GND
25 FIRSTPORTB Bit 3 75 SECONDPORTB Bit 3
26 GND 76 GND
27 FIRSTPORTB Bit 2 77 SECONDPORTB Bit 2
28 GND 78 GND
29 FIRSTPORTB Bit 1 79 SECONDPORTB Bit 1
30 GND 80 GND
31 FIRSTPORTB Bit 0 81 SECONDPORTB Bit 0
32 GND 82 GND
33 FIRSTPORTA Bit 7 83 SECONDPORTA Bit 7
34 GND 84 GND
35 FIRSTPORTA Bit 6 85 SECONDPORTA Bit 6
36 GND 86 GND
37 FIRSTPORTA Bit 5 87 SECONDPORTA Bit 5
38 GND 88 GND
39 FIRSTPORTA Bit 4 89 SECONDPORTA Bit 4
40 GND 90 GND
41 FIRSTPORTA Bit 3 91 SECONDPORTA Bit 3
42 GND 92 GND
43 FIRSTPORTA Bit 2 93 SECONDPORTA Bit 2
44 GND 94 GND
45 FIRSTPORTA Bit 1 95 SECONDPORTA Bit 1
46 GND 96 GND
47 FIRSTPORTA Bit 0 97 SECONDPORTA Bit 0
48 GND 98 GND
49 +5 V 99 +5 V
50 GND 100 GND
5-2