ADLINK cPCI-7252 User Manual

PCI-7250/7251, cPCI-7252

NuIPC / NuDAQ

Relay Actuator & Isolated D/I Cards

User’s Manual

Manual Rev. 2.00

Revision Date: January 10, 2005

Part No: 50-11105-103

Advance Technologies; Automate the World.

Copyright 2005 ADLINK TECHNOLOGY INC.

All Rights Reserved.

The information in this document is subject to change without prior
notice in order to improve reliability, design, and function and does
not represent a commitment on the part of the manufacturer.

In no event will the manufacturer be liable for direct, indirect, spe­cial, incidental, or consequential damages arising out of the use or
inability to use the product or documentation, even if advised of
the possibility of such damages.

This document contains proprietary information protected by copy­right. All rights are reserved. No part of this manual may be repro­duced by any mechanical, electronic, or other means in any form
without prior written permission of the manufacturer.

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Product names mentioned herein are used for identification pur­poses only and may be trademarks and/or registered trademarks
of their respective companies.

Getting Service from ADLINK

Customer Satisfaction is top priority for ADLINK Technology Inc.
Please contact us should you require any service or assistance.

ADLINK TECHNOLOGY INC.

Web Site: http://www.adlinktech.com

Sales & Service: [e-mail]

TEL: [phone]

FAX: [phone]

Address: 9F, No. 166, Jian Yi Road, Chungho City,

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Please email or FAX this completed service form for prompt and
satisfactory service.

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Product Model

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Environment

M/B: CPU:
Chipset: Bios:

Please give a detailed description of the problem(s):

Table of Contents

Table of Contents..................................................................... i

List of Tables.......................................................................... iv

List of Figures ......................................................................... v

1 Introduction ........................................................................ 1

1.1 Features............................................................................... 2

1.2 Applications ......................................................................... 2

1.3 Specifications....................................................................... 3

Digital input ..................................................................... 3

Relay Output ................................................................... 3

General Specifications .................................................... 4

Power Consumption ....................................................... 4

1.4 Software Support ................................................................. 5

Programming Library ...................................................... 5

PCIS-LVIEW: LabVIEW® Driver .................................... 6

PCIS-VEE: HP-VEE Driver ............................................. 6

DAQBenchTM: ActiveX Controls .................................... 6

PCIS-DDE: DDE Server and InTouchTM ...................... 6

PCIS-ISG: ISaGRAFTM driver ....................................... 6

PCIS-ICL: InControlTM Driver ........................................ 7

PCIS-OPC: OPC Server ................................................. 7

2 Installation .......................................................................... 9

2.1 Unpacking Checklist ............................................................ 9

2.2 PCB Layout........................................................................ 10

PCI-7250 PCB Layout .................................................. 10

cPCI-7252 PCB Layout ................................................. 11

2.3 Input Signal Jumper Setting............................................... 12

2.4 Hardware Installation Outline............................................. 13

PCI Configuration ......................................................... 13

PCI Slot Selection ......................................................... 13

Installation Procedures ................................................. 13

2.5 Device Installation for Windows Systems .......................... 14

2.6 Connector Pin Assignments .............................................. 14

PCI-7250/51 Pin Assignment ........................................ 14

cPCI-7252 Pin Assignment ........................................... 16

Table of Contents i

2.7 PCI-7250 and PCI-7251 Connection ................................. 17

3 Registers............................................................................ 19

3.1 PCI PnP Registers ............................................................. 19

3.2 I/O Address Map ................................................................ 20

3.3 Relay Output and Readback Registers.............................. 20

3.4 Isolation Input Registers .................................................... 21

4 Operation Theory .............................................................. 23

4.1 Using Relay Output............................................................ 23

4.2 Using Isolated Input ........................................................... 25

5 C/C++ Libraries ................................................................. 27

5.1 Libraries Installation ........................................................... 27

5.2 Programming Guide........................................................... 27

Naming Convention ...................................................... 27

Data Types ................................................................... 28

5.3 Running Testing Utility (7250UTIL.EXE)............................ 28

5.4 725X Initialization............................................................... 30

@ Description ............................................................... 30

@ Syntax ...................................................................... 30

@ Arguments ................................................................ 30

@ Return Code ............................................................. 31

5.5 _7250_DI, _7252_DI.......................................................... 32

@ Description ............................................................... 32

@ Syntax ...................................................................... 32

@ Arguments ................................................................ 32

@ Return Code ............................................................. 33

5.6 _7250_DO, _7252_DO ...................................................... 34

@ Description ............................................................... 34

@ Syntax ...................................................................... 34

@ Arguments ................................................................ 34

@ Return Code ............................................................. 35

5.7 _7250_DO_Read_Back, _7252_DO_ReadRelay.............. 35

@ Description ............................................................... 35

@ Syntax ...................................................................... 35

@ Arguments ................................................................ 35

@ Return Code ............................................................. 36

5.8 _7251_Check_Exist ........................................................... 37

@ Description ............................................................... 37

ii Table of Contents

@ Syntax ...................................................................... 37

@ Argument ................................................................. 37

@ Return Code ............................................................. 37

Appendix................................................................................ 39

Relay Contact Protection Circuits ...................................... 39

RC Circuit ..................................................................... 39

Diode Circuit ................................................................. 40

Diode & Zener diode Circuit .......................................... 41

Varistor Circuit .............................................................. 41

Warranty Policy..................................................................... 43

Table of Contents iii

List of Tables

Table 1-1: Digital Input Specifications ........................................ 3

Table 1-2: Relay Output Specifications ...................................... 3

Table 1-3: General Specifications .............................................. 4

Table 1-4: Power Consumption Specifications .......................... 4

Table 2-1: Jumpers and DI Channels ...................................... 12

Table 2-2: Input Signal Selection Jumper Settings .................. 12

Table 2-3: CN1 - PCI-7250/51 Pin Assignment ....................... 15

Table 2-4: CN1 - cPCI-7252 Pin Assignment .......................... 16

Table 3-1: PCI-7250 Address Map with PCI-7251 Installed .... 20

Table 3-2: cPCI-7252 Address Map ......................................... 20

Table 3-3: Data Format of Relay Output and Readback Status Reg-

isters ....................................................................... 21

Table 3-4: Relay Output ........................................................... 21

Table 5-1: Data Types ............................................................. 28

iv List of Tables

List of Figures

Figure 2-1: PCI-7250 Layout...................................................... 10

Figure 2-2: cPCI-7252 Layout .................................................... 11

Figure 2-3: CN1 - D Type Connector ......................................... 14

Figure 2-4: Connection between PCI-7250 and PCI-7251 ........ 17

Figure 4-1: Form C Relay .......................................................... 23

Figure 4-2: Form A Relay........................................................... 24

Figure 4-3: PCI-7250 Differential Input Circuit ........................... 25

Figure 4-4: cPCI-7252 Isolated Input Circuit .............................. 25

List of Figures v

1 Introduction

The PCI-7250/7251 and cPCI-7252 Relay Actuator and Isolated
D/I cards are basic Digital I/O cards for PCI bus compliant comput­ers used in industrial applications.

This PCI-7250 and PCI-7251 provides 8 relay actuators and 8
opto-isolated digital inputs. Of the eight relays, four are Form C
(R0~R3) and four are Form A (R4~R7). The cPCI-7252 provides 8
relay actuators and 16 opto-isolated digital inputs; all relays are
Form C. They are very suited for constant ON/OFF control
devices. For convenience the above models will be referred to as
PCI-725X in this manual.

All channels are isolated and suitable for collecting digital input
signals in a noisy environment. For identical non-polarized opto­isolated digital input channels, switching can be carried out using
AC-filtered or non-AC-filtered channels.

A LED reflects the status of each relay output. When a relay is
energized, its corresponding LED will turn ON, otherwise it is OFF.

The relay outputs and digital inputs are controlled by two bytes of
I/O addresses. When a bit is read or written, its output status will
be controlled, or its input status will be monitored. The I/O signals
are routed through to a 37-pin D-type connector that protrudes
through the computer case at the rear.

Introduction 1

1.1 Features

The PCI-725X Relay Actuator and D/I card provides the following
advanced features:

X 32-bit PCI-Bus, Plug and Play (PCI-7250)

X 32-bit CompactPCI® Bus, Plug and Play (cPCI-7252)

X 8 relay actuator outputs

X 8 opto-isolated digital inputs (PCI-7250)

X 16 opto-isolated digital inputs (cPCI-7252)

X LED indicators to show energized relays

X Jumper selectable AC-filter/non-AC-filter input signals

X On-board relay driving circuits

X On-board digital input signal conditioning circuits

Note: The PCI-7251 attaches to a PCI-7250 card. Each PCI-7251

card provides an additional 8 relay output and 8 photo isolat­ed input signals. Up to three PCI-7251 cards can be attached
to one PCI-7250 card to provide 32 relay output signals and
32 photo isolated inputs signals.

1.2 Applications

X Industrial ON/OFF control

X External high power relay driving signal switching

X Laboratory automation

X Industrial automation

X Switch contact status sensing, limit switch monitoring,

X Useful with A/D and D/A cards to implement a data acquisi-

tion & control system

2Introduction

1.3 Specifications

Digital input

Input channels

Photo-coupler PC-814

Input current

Input Voltage

Threshold Voltage 2.4VDC

Input impedance

Input mode Isolation AC-filter/ Non-AC-filter

Isolated voltage 5,000 Vrms channel-to-system

Table 1-1: Digital Input Specifications

8 for PCI-7250 and PCI-7251

16 for cPCI-7252

10mA rated

60mA max for isolated input

Up-to 24VDC or 24V AC 50-1,000Hz

Logic Low: 0-2.4V

Logic High 3-24V

Relay Output

Output channels 8

Relay type

Contact rating

Breakdown voltage 1000V AC/DC min..

Release time 8msec typical

Operate time 8msec typical

Contact resistance Bifurcated

Insulation resistance

Life expectancy > 10 million operations at full load

LED indicators Monitor ON/OFF status of each relay

Coil Voltage +5V, 33mA for each relay, total 0.264A

Power supply of Relay +5V from the PCI-Bus

Table 1-2: Relay Output Specifications

4 SPDT (Form C)
4 SPST (Form A)

120VAC/DC, 0.5A

24VDC, 1A

100MΩ min.

1.2K

Ω

Introduction 3

General Specifications

X 162mm x 107mm for PCI-7250

Dimensions

Bus 32-bit PCI bus

Operating temperature 0 - 60ºC (Operating)

Storage temperature -20ºC - 80ºC (Operating)

Humidity 5 to 90% non-condensing

Table 1-3: General Specifications

X 141mm x 102mm for PCI-7251

X 160mm x 100mm for cPCI-7252

Power Consumption

Power Consumption Note: No relay is energized

PCI-7250 +5V @ 140mA

PCI-7251 +5V @ 125mA

cPCI-7252 +5V @ 120mA

Table 1-4: Power Consumption Specifications

4Introduction

1.4 Software Support

ADLINK provides versatile software drivers and packages to
address different approaches to building a system. We not only
provide programming libraries such as DLLs for many Windows
systems, but also provide drivers for many software packages
such as LabVIEW®, HP VEETM, DASYLabTM, InTouchTM,
InControlTM, ISaGRAFTM, etc.

All software options are included in the ADLINK CD. Non-free soft­ware drivers are protected with licensing codes. Without the soft­ware code, you can install and run the demo version for two hours
for trial/demonstration purposes. Please contact ADLINK dealers
to purchase a formal license.

Programming Library

For customers who are writing their own programs, we provide
function libraries for many different operating systems, including:

X DOS Library: For Borland C/C++, and Microsoft C++, the

functions descriptions are included in this user’s guide.

X Windows 95 DLL: For VB, VC++, Delphi, BC5, the functions

descriptions are included in this user’s guide.

X PCIS-DASK: Included device drivers and DLL for Windows

98, Windows NT and Windows 2000. A DLL is a binary
compatible across Windows 98, Windows NT and Windows

2000. That means all applications developed with PCIS­DASK are compatible across Windows 98, Windows NT,
and Windows 2000. The developing environment can be
VB, VC++, Delphi, BC5, or any Windows programming lan­guage that allows calls to a DLL. The user’s guide and func­tion reference manual of PCIS-DASK are in the CD. Please
refer the PDF manual files under \\Manual_PDF\Soft­ware\PCIS-DASK

The above software drivers are shipped with the board. Please
refer to the “Software Installation Guide” for installation proce­dures.

Introduction 5

PCIS-LVIEW: LabVIEW® Driver

PCIS-LVIEW contains VIs that are used to interface with the Lab­VIEW® software package. PCIS-LVIEW supports Windows 95/98/
NT/2000. The LabVIEW® drivers are shipped free with the board.
You can install and use them without a license. For more informa­tion about PCIS-LVIEW, please refer to the user’s guide in the CD
(\\Manual_PDF\Software\PCIS-LVIEW).

PCIS-VEE: HP-VEE Driver

PCIS-VEE includes user objects, which are used to interface with
the HP VEE software package. PCIS-VEE supports Windows 95/
98/NT. The HP-VEE drivers are shipped free with the board. For
more information about PCIS-VEE, please refer to the user’s
guide in the CD (\\Manual_PDF\Software\PCIS-VEE).

DAQBenchTM: ActiveX Controls

Customers familiar with ActiveX controls and VB/VC++ program­ming can use the DAQBenchTM ActiveX Control component
library for developing applications. DAQBenchTM is designed for
Windows NT/98. For more information about DAQBench, please
refer to the user’s guide in the CD (\\Manual_PDF\Soft­ware\DAQBench\DAQBench Manual.PDF).

PCIS-DDE: DDE Server and InTouchTM

DDE stands for Dynamic Data Exchange. PCIS-DDE includes the
PCI cards’ DDE server. The PCIS-DDE server is included in the
ADLINK CD and requires a license. The DDE server can be used
in conjunction with any DDE client under Windows NT.

PCIS-ISG: ISaGRAFTM driver

ISaGRAF WorkBench is an IEC1131-3 SoftPLC control program
development environment. PCIS-ISG includes ADLINK product
drivers for ISaGRAF under the Windows NT environment. PCIS­ISG is included in the ADLINK CD and license is required to use
the drivers.

6Introduction

PCIS-ICL: InControlTM Driver

PCIS-ICL is the InControl driver which supports Windows NT.
PCIS-ICL is included in the ADLINK CD and license is required to
use the drivers.

PCIS-OPC: OPC Server

PCIS-OPC is an OPC Server that can link with OPC clients. There
are several software packages on the market which can provide
OPC clients. PCIS-OPC supports Windows NT and requires a
license to operate.

Introduction 7

8Introduction

2 Installation

This chapter describes how to install and setup the 725X cards.
Jumper settings for the digital input channel configurations (AC-fil­ter or Non-AC-filter) and the signal definitions of the 37-pins con­nectors are also specified.

2.1 Unpacking Checklist

Check the shipping carton for any damage. If the shipping carton
and contents are damaged, notify the dealer for a replacement.
Retain the shipping carton and packing materials for inspection by
the dealer. Obtain authorization before returning any product to
ADLINK.

Check the following items are included in the package, if there are
any items missing, please contact your dealer:

Included Items

X PCI-7250 (or PCI-7251, cPCI-7252) Relay Actuator & Iso-

lated D/I Card

X ADLINK CD (for PCI-7250 and cPCI-7252 only)

X Software Installation Guide

X This User’s Manual

Note: The packaging of OEM versions with non-standard

configuration, functionality, or package may vary
according to different configuration requests.

CAUTION: The boards must be protected from static discharge

and physical shock. Never remove any of the socketed
parts except at a static-free workstation. Use the anti­static bag shipped with the product to handle the
board. Wear a grounded wrist strap when servicing

Installation 9

2.2 PCB Layout

PCI-7250 PCB Layout

Figure 2-1: PCI-7250 Layout

10 Installation

cPCI-7252 PCB Layout

Figure 2-2: cPCI-7252 Layout

Installation 11

2.3 Input Signal Jumper Setting

Note: This section is for PCI-7250 and PCI-7251 only.

There are 8 jumpers (JP1 to JP8) on the PCI-7250 and PCI-7251;
each associated with one digital input to configure that channel as
either AC-Filtered or Non-AC-Filtered. Digital input channels and
corresponding jumpers are listed in the table below

JUMPER INPUT SIGNAL

JP1 DI0

JP2 DI1

JP3 DI2

JP4 DI3

JP5 DI4

JP6 DI5

JP7 DI6

JP8 DI7

Table 2-1: Jumpers and DI Channels

The default setting for the input signal selection is Non-AC-Filter
(DC signal input), which is shown as below:

JP1

Input Signal Selection

Jumper JP1 - JP8 2-3 1-2

Table 2-2: Input Signal Selection Jumper Settings

12 Installation

Non-AC-Filter

(DC Signal)

AC-Filter

(AC Signal)

2.4 Hardware Installation Outline

PCI Configuration

PCI cards (or CompactPCI cards) are equipped with plug and play
PCI controllers which can request base addresses and interrupts
according to the PCI standard. The system BIOS will assign the
system resources based on the PCI card configuration registers
and system parameters (which are set by the system BIOS). Inter­rupt assignment and memory usage (I/O port locations) can only
be assigned by the system BIOS. These system resource assign­ments are done on a board-by-board basis. It is not suggested to
assign the system resource by any other methods.

PCI Slot Selection

The PCI card can be inserted into any PCI slot without any config­uration of the system resources. The CompactPCI card can also
be inserted into any CompactPCI I/O slot.

Installation Procedures

1. Turn off your computer

2. Turn off all accessories (printer, modem, monitor, etc.)
connected to your computer.

3. Remove the cover from your computer.

4. Setup jumpers on the PCI or CompactPCI card.

5. Select a 32-bit PCI slot. PCI slot are shorter than ISA or
EISA slots, and are usually white or ivory.

6. Before handling the PCI cards, discharge any static
buildup on your body by touching the metal case of the
computer. Hold the edge and do not touch the compo­nents.

7. Position the board into the PCI slot you selected.

8. Secure the card in place at the rear panel of the system.

Installation 13

2.5 Device Installation for Windows Systems

Once Windows 95/98/2000 has started, the Plug and Play func­tions of the Windows system will find and locate the new NuDAQ/
NuIPC card. If this is the first time a NuDAQ/NuIPC card is
installed in your Windows system, you will be prompted to input
the device information source. Please refer to the “Software Instal­lation Guide” for installation procedures for the device drivers.

2.6 Connector Pin Assignments

PCI-7250/51 Pin Assignment

The PCI-7250 card comes equipped with a 37-pin D type connec­tor (CN1) accessible from the rear of the card. The pin assignment
of the D type connector is shown in below.

NO0

COM0

NC0

NO1

COM1

NC1

NO2

COM2

NC2

NO7

COM7

DI0

DI1

DI2

DI3

DI4

DI5

DI6

DI7

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

Figure 2-3: CN1 - D Type Connector

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

NO3

COM3

NC3

NO4

COM4

NO5

COM5

NO6

COM6

N/C

DI0

DI1

DI2

DI3

DI4

DI5

DI6

DI7

14 Installation

Legend

Din:

NC n: Normal close pin of relay n

NO n: Normal open pin of relay n

COM n: Common pin of relay n

N/C: No connection

Table 2-3: CN1 - PCI-7250/51 Pin Assignment

Digital input low, channel n

(input signal Is not polarity sensitive)

Installation 15

cPCI-7252 Pin Assignment

Signal Pin Pin Signal

IGND 1 26 IGND

DI8 2 27 DI12

DI9 3 28 DI13

DI10 4 29 DI14

DI11 5 30 DI15

DI0L 6 31 DI4H

DI0H 7 32 DI4L

DI1L 8 33 DI5H

DI1H 9 34 DI5L

D2IL 10 35 DI6H

DI2H 11 36 DI6L

DI3L 12 37 DI7H

DI3H 13 38 DI7L

NO01439NO5

NO11540NO4

COM0 16 41 COM5

COM1 17 42 COM4

NC0 18 43 NC5

NC1 19 44 NC4

NO22045NO7

NO32146NO6

COM2 22 47 COM7

COM3 23 48 COM6

NC2 24 49 NC7

NC3 25 50 NC6

Table 2-4: CN1 - cPCI-7252 Pin Assignment

16 Installation

Legend

Din: Digital input channel n

IGND: Ground of DIn signals

DinH: Digital input channel n with positive polarity

DinL: Digital input channel n with negative polarity

NC n: Normal close pin of relay n

NO n: Normal open pin of relay n

COM n: Common pin of relay n

2.7 PCI-7250 and PCI-7251 Connection

There are 8-relay outputs and 8-isolation inputs on both the PCI­7250 and PCI-7251. The PCI-7251 is used as an expansion for
the PCI-7250. The operations of the PCI-7251 are the same as
that of the PCI-7250. There can be at most 3 PCI-7251 expansion
boards to one PCI-7250. Therefore, the PCI-7250 can control up
to 32 relays and detect 32 input signals.

Figure 2-4: Connection between PCI-7250 and PCI-7251

Installation 17

18 Installation

3Registers

Detailed descriptions of the registers are specified in this chapter.
This information is useful for programmers who wish to control the
card with low-level programming. However, we suggest users fully
understand the PCI interface before starting any low-level pro­gramming. In addition, the contents of this chapter will also help
users understand how to use the software drivers to configure this
card.

3.1 PCI PnP Registers

This PCI card functions as a 32-bit PCI target device to any mas­ter on the PCI bus. There are three types of registers: PCI Config­uration Registers (PCR), Local Configuration Registers (LCR) and
725X registers.

The PCR, which is PCI-bus specification compliant, is initialized
and controlled by the Plug and Play (PnP) PCI BIOS. Users may
obtain more information on the PCI BIOS specification to better
understand the operation of the PCR. Please contact PCISIG to
acquire PCI interface specifications.

The PCI bus controller PCI-9050 is provided by PLX Technology
Inc. (www.plxtech.com). For more information about the LCR,
please visit PLX Technology’s web site to download relative infor­mation. It is not necessary for users to fully understand the details
of the LCR if the software library provided is used. The PCI PnP
BIOS assigns the base address of the LCR. The assigned address
is located at an offset of 14h from the PCR.

The 725X registers are discussed in the next section. The base
address, which is also assigned by the PCI PnP BIOS, is located
at an offset of 18h from the PCR. Therefore, users can read the
address 18h from the PCR to obtain its base address by using the
BIOS function call. Do not attempt to modify the base address and
interrupt that have been assigned by the PCI PnP BIOS, it may
cause resource conflicts with your system.

Registers 19

3.2 I/O Address Map

All 725X registers are 8 bits long. Users can access these regis­ters using 8-bit I/O instructions. Using these registers will allow the
relays and status of the inputs to be controlled. The following table
shows the registers address map, including descriptions and their
offset addresses relative to the base address. If the PCI-7251
expansion boards are not installed, corresponding registers have
no significance.

Offset Write Read Board

0 Relay Output Output readback

1 Not used Isolation Input

2 Relay Output Output readback

3 Not used Isolation Input

4 Relay Output Output readback

5 Not used Isolation Input

6 Relay Output Output readback

7 Not used Isolation Input

Table 3-1: PCI-7250 Address Map with PCI-7251 Installed

Offset Write Read Board

0 Relay Output Isolation Input

2 Not used Output readback

Table 3-2: cPCI-7252 Address Map

PCI-7250

PCI-7251 #1

PCI-7251 #2

PCI-7251 #3

cPCI-72521 Not used Not used

3.3 Relay Output and Readback Registers

There are 8 relays on each PCI-7250 / 7251 and cPCI-7252
board. Each relay is controlled by one bit in the control register. Bit
value ‘0’ means the relay is not energized. The normal open signal
line is ‘open’. Bit value ‘1’ means the relay is energized and the
normal open signal line is now closed.

The initial bit values of the control register are all ‘0’ and the status
of the relay can be readback from the readback register. If the

20 Registers

relay is open, the corresponding bit value read is ‘0’. If the relay is
closed, the bit value read is ‘1’.

Bit 7 6 5 4 3 2 1 0

Relay Output DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

Output Readback RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0

Table 3-3: Data Format of Relay Output and Readback Status Registers

3.4 Isolation Input Registers

There are 8 isolated input channels on the PCI-7250 / 7251 board.
The status of the 8 channels can be read from the isolation input
register. Each bit corresponds to each channel. Bit value “1”
means input voltage is high and “0” means input voltage is low.

Bit 76543210

Iso. Input DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

Bit 15141312111098

Iso. Input DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

Table 3-4: Relay Output

Note: Bits 8-15 are for cPCI-7252 only

Registers 21

22 Registers

4 Operation Theory

4.1 Using Relay Output

The PCI-7250 contains two types of relays: Form C and Form A.
Relays R0 - R3 are form C relays, and R4 - R7 are plain form A
type. Note that the cPCI-7252 contains Form C relays only. The
differences between these two types of relays are:

1. Form C Relay: (R0 - R3)

NO

COM

NC

Control Bit = High (1)

Figure 4-1: Form C Relay

Form C type relays have three contacts: NC (Normal Close), NO
(Normal Open), and COM (Common). The COM post, located at
the middle, must make contact with either the NO post or NC post.
When the control bit is high (1), there is contact between the COM
post and NO post. If the control bit is low (0), there is contact
between the COM post and NC post.

In normal power-up and reset, the relay is in low status.

NO

COM

NC

Control Bit = Low (0)

Operation Theory 23

2. Form A Relay: (R4 - R7)

NO

NO

COM

Control Bit = High(1)

COM

Control Bit = Low(0)

Figure 4-2: Form A Relay

Form A relay only has two contacts: NO (Normal Open) and COM
(Common). The COM post can make contact either with the NO
post or not. When the control bit is high (1), the COM post and NO
post are contacted. If the control bit is low (0), the COM post and
NO post does not make contact.

In normal power-up and reset, the relay is in low status.

The relay output contacts are rated at a maximum of 0.5A at
120VAC (resistive), 1A 24VDC, or 0.3A 60VDC. You should
reduce these ratings for inductive loads. For more information on
relay contact, please refer to the Appendix.

24 Operation Theory

4.2 Using Isolated Input

Ω

Ω

The PCI-7250 (or PCI-7251) contains 8 identical opto-isolated
control input channels. The circuit diagram of the differential input
channel is shown below.

DInH

IN

V

1.2k

F

I

Ri

DInL

Figure 4-3: PCI-7250 Differential Input Circuit

The digital input is first routed through a photo-coupler (PC-814),
which is shown in the following diagram.

The cPCI-7252 contains 16 identical opto-isolated control input
channels. The circuit diagram of the differential input signals of
channel number 0-7 are the same as of the PCI-7250. While the
input signals for channel numbers 8-15 are isolated inputs, the
connection is not polarity sensitive whether AC or DC voltage is
used.

DInH

IN

V

1.2k

Ri

F

I

IGND

PC-814
(opto-isolator)

PC-814
(opto-isolator)

Figure 4-4: cPCI-7252 Isolated Input Circuit

Operation Theory 25

In addition, a single-pole filter with a time constant of about 5ms is
used to filter AC inputs passing through.

The normal input voltage range for an active high state is 3 to
24VAC or DC. The normal input range can be extended by chang­ing the resister (Ri) to limit the current (IF) through the PC-814
(opto-isolator to about 10mA). The exact resister value to replace
the original resister Ri (1.2K

Ω) can be calculated by the following

formula.

Vin = IF x Ri
Pw = Vin x IF

For example, if the input voltage is 110V, then the Ri should be
replace by

Ri = 110 (V) / 0.01 (A) = 11 KΩ
Pw = 110 (V) X 0.01 (A) = 1.1 W

26 Operation Theory

5 C/C++ Libraries

This chapter describes the software libraries for operating this
card. Only functions in the DOS library and Windows 95 DLL are
described. Refer to the PCIS-DASK function reference manual,
which is included in the ADLINK CD, for descriptions of Windows
98/NT/2000 DLL functions.

The function prototypes and useful constants are defined in the
header files located in the LIB directory (DOS) and INCLUDE
directory (Windows 95). For the Windows 95 DLL, the developing
environment can be Visual Basic 4.0 or above, Visual C/C++ 4.0
or above, Borland C++ 5.0 or above, Borland Delphi 2.x (32-bit) or
above, or any Windows programming language that allows calls to
a DLL.

5.1 Libraries Installation

Refer to the “Software Installation Guide” for information regarding
software installation of libraries for DOS, Windows 95 DLL, or
PCIS-DASK for Windows 98/NT/2000.

The device drivers and DLL functions for Windows 98/NT/2000
are included in the PCIS-DASK. Refer to the PCIS-DASK user’s
guide and function reference, which is included in the ADLINK CD,
for programming information.

5.2 Programming Guide

Naming Convention

The functions of the NuDAQ PCI or NuIPC CompactPCI card soft­ware drivers uses full-names to represent the functions' real
meaning. The naming convention rules are:

In a DOS Environment:

_{hardware_model}_{action_name}.

e.g. _7250_Initial().

All functions in the PCI-7250 driver start with 7250 as
{hardware_model}. All functions in cPCI-7252 driver start with
7252 as {hardware_model}.

C/C++ Libraries 27

In order to recognize the difference between the DOS library and
Windows 95 library, a capital "W" is placed at the start of each
function name for Windows 95 DLL drivers. e.g.
W_7252_Initial().

Data Types

We have defined some data types in the Pci_7250.h (DOS) and
Acl_pci.h (Windows 95) header files. These data types are used
by the NuDAQ card library. We recommend you use these data
types in your application programs. The following table shows the

data type names and their range.

Typ e N ame Description Range

U8 8-bit ASCII character 0 to 255

I16 16-bit signed integer -32768 to 32767

U16 16-bit unsigned integer 0 to 65535

I32 32-bit signed long integer -2147483648 to 2147483647

U32 32-bit unsigned long integer 0 to 4294967295

F32 32-bit single-precision floating-point

F64 64-bit double-precision floating-point

Boolean Boolean logic value TRUE, FALSE

Table 5-1: Data Types

-3.402823E38 to

3.402823E38

-1.797683134862315E308 to

1.797683134862315E309

5.3 Running Testing Utility (7250UTIL.EXE)

After finishing the DOS installation, you can execute the utility by
typing the following command:

The following:

C> cd\ADLINK\7252\DOS\UTIL
(“cd\ADLINK\7250\DOS\util” for PCI-7250)
C> 7252UTIL

The following interface will be displayed on the screen.

28 C/C++ Libraries

You can use this program to test the functionality of the digital
inputs and outputs.

A detailed description of each function is specified in the proceed­ing sections.

C/C++ Libraries 29

5.4 725X Initialization

@ Description

The PCI-7250 and cPCI-7252 cards are initialized according to the
card number. Because the PCI-7250 has a PCI bus architecture
and meets the plug and play design specification, the IRQ and
base_address (pass-through address) are assigned by the system
BIOS directly. Every PCI-7250 card has to be initialized by this
function before calling any other functions.

Note: Because the configuration of PCI card is handled by the sys­tem, there are no jumpers or IRQ selection on the PCI board that
needs to be set up by the users.

@ Syntax

C/C++ (DOS)

U16 _7250_Initial (U16 *existCards, PCI_INFO

*pciInfo)

U16 _7252_Initial (U16 *existCards, PCI_INFO

*pciInfo)

C/C++ (Windows 95)

U16 W_7250_Initial (U16 *existCards, PCI_INFO

*pciInfo)

U16 W_7252_Initial (U16 *existCards, PCI_INFO

*pciInfo)

Visual Basic (Windows 95)

W_7250_Initial (existCards As Integer, pciInfo As

PCI_INFO) As Integer

W_7252_Initial (existCards As Integer, pciInfo As

PCI_INFO) As Integer

@ Arguments

existCards: The number of installed PCI-7250 cards. The
returned value shows how many PCI-7250 cards are installed in
your system.

pciinfo: It is a structure to memorize the PCI bus plug and play
initialization information, which is decided by the P&P BIOS. The
PCI_INFO structure is defined in ACL_PCI.H. The base I/O

30 C/C++ Libraries

addresses and the interrupt channel number are stored in pciinfo,
which is for reference.

@ Return Code

ERR_NoError, ERR_PCIBiosNotExist

C/C++ Libraries 31

5.5 _7250_DI, _7252_DI

@ Description

This function is used to read data from the digital input port. There
are eight 8-bit digital inputs on the PCI-7250 or PCI-7251
extended board. You can obtain all 32 input data from using the
_7250_DI function.

@ Syntax

C/C++ (DOS)

U16 _7250_DI (U16 cardNo, U16 diPortNo, U16

*diData)

U16 _7252_DI (U16 cardNo, U16 *diData)

C/C++ (Windows 95)

U16 W_7250_DI (U16 cardNo, U16 diPortNo, U16

*diData)

U16 W_7252_DI (U16 cardNo, U16 *diData)

Visual Basic (Windows 95)

W_7250_DI (ByVal cardNo As Integer, ByVal

diPortNo As Integer, diData As Integer) As
Integer

W_7252_DI (ByVal cardNo As Integer, diData As

Integer) As Integer

@ Arguments

cardNo: card number selected

diPortNo: Digital Input Channel No, the constant is:.

DI_PORT0 0x00 Access the 8 Digital Input of PCI-7250

DI_PORT1 0x01 Access the 8 Digital Input of Expansion Board PCI-7251#1

DI_PORT2 0x02 Access the 8 Digital Input of Expansion Board PCI-7251#2

DI_PORT3 0x03 Access the 8 Digital Input of Expansion Board PCI-7251#3

Note: This argument is not necessary for cPCI-7252

diData: return 8-bit value from digital port.

32 C/C++ Libraries

@ Return Code

ERR_NoError
ERR_BoardNoInit

C/C++ Libraries 33

5.6 _7250_DO, _7252_DO

@ Description

This function is used to write data to the digital output port. This
energizes or de-energizes the RELAY. There are 8 digital outputs
on the PCI-7250 or PCI-7251 extended board. You can control all
32 RELAY’s through using the _7250_DO function.

@ Syntax

C/C++ (DOS)

U16 _7250_DO (U16 cardNo, U16 doPortNo, U16

doData)

U16 _7252_DO (U16 cardNo, U16 doData)

C/C++ (Windows 95)

U16 W_7250_DO (U16 cardNo, U16 doPortNo, U16

doData)

U16 W_7252_DO (U16 cardNo, U16 doData)

Visual Basic (Windows 95)

W_7250_DO (ByVal cardNo As Integer, ByVal

doPortNo As Integer, ByVal doData As
Integer) As Integer

W_7252_DO (ByVal cardNo As Integer, ByVal doData

As Integer) As Integer

@ Arguments

cardNo: card number selected

doChannelNo: Digital Output Channel No, the constant is:.

DI_PORT0 0x00 Access the 8 Digital Input of PCI-7250

DI_PORT1 0x01 Access the 8 Digital Input of Expansion Board PCI-7251#1

DI_PORT2 0x02 Access the 8 Digital Input of Expansion Board PCI-7251#2

DI_PORT3 0x03 Access the 8 Digital Input of Expansion Board PCI-7251#3

Note: This argument is not necessary for cPCI-7252

doData: value will be written to digital output port

34 C/C++ Libraries

@ Return Code

ERR_NoError, ERR_BoardNoInit

5.7 _7250_DO_Read_Back, _7252_DO_ReadRelay

@ Description

This function is used to read-back data from the digital output port
which is control by the 725X_DO function. There are 8-bit digital
outputs on the PCI-7250, cPCI-7252, or PCI-7251 extended
board. You can readback all RELAY status (High or Low) by using
this function.

@ Syntax

C/C++ (DOS)

U16 _7250_DO_Read_Back (U16 cardNo, U16

doChannelNo, U8 *doReadBackData)

U16 _7252_DO_ReadRelay (U16 cardNo, U16

doReadBackData)

C/C++ (Windows 95)

U16 W_7250_DO_Read_Back (U16 cardNo, U16

doChannelNo, U16 *doReadBackData)

U16 W_7252_DO_ReadRelay (U16 cardNo, U16

*doReadBackData)

Visual Basic (Windows 95)

W_7250_DO_Read_Back (ByVal cardNo As Integer,

ByVal doChannelNo As Integer, doReadBackData
As Integer) As Integer

W_7252_DO_ReadRelay (ByVal cardNo As Integer,

doReadBackData As Integer) As Integer

@ Arguments

cardNo: card number selected

doChannelNo: Digital Output Channel No, the constant is:

DI_PORT0 0x00 Access the 8 Digital Input of PCI-7250

DI_PORT1 0x01 Access the 8 Digital Input of Expansion Board PCI-7251#1

DI_PORT2 0x02 Access the 8 Digital Input of Expansion Board PCI-7251#2

C/C++ Libraries 35

DI_PORT3 0x03 Access the 8 Digital Input of Expansion Board PCI-7251#3

Note: This argument is not necessary for cPCI-7252

diReadBackData: value read back from digital output port

@ Return Code

ERR_NoError, ERR_BoardNoInit

36 C/C++ Libraries

5.8 _7251_Check_Exist

@ Description

This function is used to check the existence of the PCI-7251
expanded board. For normal configuration, each PCI-7250 can be
connected with up to three PCI-7251 boards. This function is used
to detect the presence of the PCI-7251.

@ Syntax

C/C++ (DOS)

U16 _7251_Check_Exist
(U16 cardNo, U16 extnesionBoardNo)

C/C++ (Windows 95)

U16 _7251_Check_Exist
(U16 cardNo, U16 extnesionBoardNo)

Visual Basic (Windows 95)

W_7251_Check_Exist (ByVal cardNo As Integer,

ByVal extensionBoardNo As Integer) As
Integer

@ Argument

cardNo: card number to select borad

existBoardNo: Extension PCI-7251 No.

PCI_7251_EX1 0x01 PCI-7251 Board #1

PCI_7251_EX2 0x02 PCI-7251 Board #2

PCI_7251_EX3 0x03 PCI-7251 Board #3

@ Return Code

PCI_7251_EXIST 1
PCI_7251_NOT_EXIST 0

C/C++ Libraries 37

38 C/C++ Libraries

Appendix

Relay Contact Protection Circuits

The contacts are the most important elements of a relay construc­tion, Contact performance conspicuously influenced by contact
material, and voltage and current values applied to the contacts.

Another important issue is contact protection; the right contact pro­tection circuit can suppress the counter EMF to a low level. How­ever, note that incorrect use will result in an adverse effect. Typical
contact protection circuits are given below:

RC Circuit

This circuit is suitable for DC applications. If the load is a timer,
leakage current flow through the RC circuit may cause faulty oper­ation.

Contact

R C

Inductive

Load

The circuit below is suitable for both DC and AC applications. If
the load is a relay or solenoid, the release time is lengthened.
Effective when connected to both contacts if the power supply volt­age is 24V or 48V and the voltage cross the load is 100 to 200V.

Contact

R
C

Inductive

Load

Appendix 39

Device Selection:

As a guide in selecting R and C,

X R: 0.5 to 1Ω per 1V contact voltage

X C: 0.5 to 1µF per 1A contact current

Values vary depending on the properties of the capacitor C acting
to suppress the discharge the moment the contacts open. Resistor
R acts to limit the current when the power is turned on. Test to
confirm. Use a capacitor with a breakdown voltage of 200 to 300V.
Use AC type capacitors (non-polarized) for AC circuits.

Diode Circuit

This circuit is suitable for DC applications. The diode connected in
parallel causes the energy stored in the coil to flow to the coil in
the form of current and dissipates it as joule heat at the resistive
component of the inductive load. This circuit further delays the
release time compared to the RC circuit.

Contact

Diode

Inductive

Load

Device Selection:

Use a diode with a reverse breakdown voltage of at least 10 times
the circuit voltage and a forward current at least as large as the
load current.

40 Appendix

Diode & Zener diode Circuit

This circuit is also suitable for DC application. Effective when the
release time i in the diode circuit is too long.

Contact

Diode

Inductive

Load

Device Selection:

Use a zener diode with a zener voltage about the same as the
power supply voltage.

Varistor Circuit

This circuit is also suitable for both AC & DC applications. Using
the stable voltage characteristics of the varistor, this circuit pre­vents excessively high voltages from being applied across the
contacts. This circuit also slightly delays the release time. Effective
when connected to both contacts if the power supply voltage is
24V or 48V and the voltage cross the load is 100 to 200V.

Contact

Diode

Inductive

Load

Appendix 41

42 Appendix

Warranty Policy

Thank you for choosing ADLINK. To understand your rights and
enjoy all the after-sales services we offer, please read the follow­ing carefully.

1. Before using ADLINK’s products please read the user man­ual and follow the instructions exactly. When sending in
damaged products for repair, please attach an RMA appli­cation form which can be downloaded from: http://
rma.adlinktech.com/policy/.

2. All ADLINK products come with a two-year guarantee:

X The warranty period starts from the product’s shipment

date from ADLINK’s factory.

X Peripherals and third-party products not manufactured

by ADLINK will be covered by the original manufactur­ers' warranty.

X For products containing storage devices (hard drives,

flash cards, etc.), please back up your data before send­ing them for repair. ADLINK is not responsible for loss of
data.

X Please ensure the use of properly licensed software with

our systems. ADLINK does not condone the use of
pirated software and will not service systems using such
software. ADLINK will not be held legally responsible for
products shipped with unlicensed software installed by
the user.

X For general repairs, please do not include peripheral

accessories. If peripherals need to be included, be cer­tain to specify which items you sent on the RMA Request
& Confirmation Form. ADLINK is not responsible for
items not listed on the RMA Request & Confirmation
Form.

Warranty Policy 43

3. Our repair service is not covered by ADLINK's two-year
guarantee in the following situations:

X Damage caused by not following instructions in the

user's manual.

X Damage caused by carelessness on the user's part dur-

ing product transportation.

X Damage caused by fire, earthquakes, floods, lightening,

pollution, other acts of God, and/or incorrect usage of
voltage transformers.

X Damage caused by unsuitable storage environments

(i.e. high temperatures, high humidity, or volatile chemi­cals).

X Damage caused by leakage of battery fluid during or

after change of batteries by customer/user.

X Damage from improper repair by unauthorized techni-

cians.

X Products with altered and/or damaged serial numbers

are not entitled to our service.

X Other categories not protected under our warranty.

4. Customers are responsible for shipping costs to transport
damaged products to our company or sales office.

5. To ensure the speed and quality of product repair, please
download an RMA application form from our company web­site: http://rma.adlinktech.com/policy. Damaged products
with attached RMA forms receive priority.

If you have any further questions, please email our FAE staff:
[e-mail].

44 Warranty Policy