Advantech PCL-725 Manuale utente

PCL-725

Relay Actuator and Isolated D/I Card

USER'S MANUAL

This documentation is copyrighted 1989 by Advantech Co.,

Ltd. All rights are reserved. Advantech Co., Ltd. Reserves

the right to make improvements in the products described

in this manual at any time without notice.

No part of this manual may be reproduced, copied,

translated or transmitted in any form or by any means

without the prior written permission of Advantech Co., Ltd.

Information provided in this manual is intended to be

accurate and reliable. However, Advantech Co., Ltd.

assumes no responsibility for its use, nor for any

infringements of the rights of third parties which may result

from its use.

ACKNOWLEDGEMENTS

PC-LabCard is a trademark of Advantech Co., Ltd.

IBM and PC are trademarks of International Business

Machines Corporation.

MS-DOS is a trademark of Microsoft Corporation.

BASIC is a trademark of Dartmouth College.

Inter is a trademark of Intel Corporation.

Part No. 2003072500 4th Edition

Printed in Taiwan Sept. 1995

TABLE OF CONTENTS

CHAPTER 1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1. General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2. Features, Application and Specifications . . . . . . . . . . . . . . . . . . . 2

CHAPTER2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1. Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2. Base Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.3. ConnectorPin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.4. Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5. Installing The PCL-725 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

CHAPTER3. DIGITAL I/O PROGRAMMING . . . . . . . . . . . . . . . . . . 11

CHAPTER 4. CUSTOMIZE THE CURRENT LIMIT RESISTOR . . .13

CHAPTER5. RELAY OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1. Using the ContactProtection Nomograph . . . . . . . . . . . . . . . . ..16

AppendixA. I/Oport Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

CHAPTER 1. INTRODUCTION

1.1. General Description

The most common method of interfacing a microcomputer system, such as the

PC, is through the use of programmable digital input and output registers.

With digital output registers, the computer can write data into the registers,

treating the register as an I/O port. The output of these registers can then be

wired to an interface device, such as a relay. Thus, by writing data to an output

in turn, control, for example, the power to a motor.

Digital input registers are similar but are used to sample the status of signals

attached to their inputs. For example, if a program wants to determine if a

switch is open or closed, the switch can be tied to the input of a digital input

attached to individual bit locations. When read, the data results reflect the state

of the signals on the wires.

Designed with this idea in mind, the PCL-725 Relay Actuator & Isolated D/I

card is an IBM PC add-on card that offers you 8 relay actuators and 8 opto-

isolated digital inputs on a single board.

Typically, the 8 on-board relays can serve as ON/OFF control devices or small

power switches. The 8 opto-isolated D/I channels are ideal devices for

collecting digital inputs under noisy environment or floating potential. Also, the

8 isolated inputs provide the best method to prevent the ground loop problem.

For easy monitoring, each relay is equipped with one red LED to reflect its

ON/OFF status. Each input channel is jumper selectable to either isolated or

non-isolated input. Access to input and output channels is made possible

through a on-board 37-pin D type connector.

PCL-725 Introduction

1.2. Features, Application and Specifications

Features :

* 8 Relay actuator outputs.

* 8 Opto-isolated digital inputs.

* LED indicators to show activated relays.

* Jumper selectable isolated/non-isolated input signals.

* On-board relay driver circuits.

* On-board input signal conditioning circuits.

* Easy touse andprogram

Applications :

* Digital signal sensing.

* Switch contact status sensing.

* Limit switch monitoring.

* BCD interface.

* Industrial on/off control.

* Signal switching.

* Valve/solenoid control.

* External high power relay driving.

* Alarm activating.

* Annunciator control.

* Industrial automation.

* Laboratory automation.

* Useful with A/D's and D/A's.

PCL-725 Introduction

Specifications:

* Isolated Digital Input

Opto-isolator: 4N25

Input channels: 8

Input current: 60 MA max for isolated input. Input

buffered by voltage comparator

Input voltage: 5-24VDC

Input impedance: 560 Ohm/W

Threshold voltage: 1.5 VDC, adjustable by changing voltage

dividing resistors

Input mode: isolated or non-isolated

Withstanding voltage: 1500 VDC

* Non-isolated Digital Input

Logic level 0: 0-0.8 V

Logic level I: 2.0-5.25 V

" Relay Output

Relay Type: 4 SPDT (Form C)

4 SPST (Form A)

Contact rating: 120 V AC/DC, IA

Breakdown voltage: 1000 V AC/DC minimum

Operating time: 8 msec maximum (including Bounce)

Release time: 8 msec maximum

Insulation resistance: 100 MOhm minimum

Life expectancy: >10 million operations at full load

Power consumption: +12V, 33 mA for each relay, total

0.264A if ail relays are energized

+5V, less than 0.2A

Power supply: +12V from the PC bus

PCL-725 Introduction

* General

Dimensions : 5 3/4" x 3 3/4" (14.7 cm x 9.5 cm.)

Bus : IBM PC bus.

Slot : One 62-pin slot.

I/O port Address : Hex 200 - hex 3F8.

CHAPTER 2. INSTALLATION

2.1. Initial Inspection

Inside the shipping container, you should find this operating manual and the

PCL-725 card.

The PCL-725 was carefully inspected both mechanically and electrically before

shipment. It should be free of marks and scratches and in perfect electrical order

on receipt.

Remove the PCL-725 interface card from its protective packaging by grasping

the metal rear panel. Keep the anti-vibration package since it may be used to

return the card if it needs repair. The package may also be used if the card is

stored outside of the computer.

The board should be handled only by the edges. The integrated circuits on the

board can be damaged by static electric discharge.

2.2. Base Address Selection

Most of the peripheral devices and the interface adapters in the PC are

controlled and sensed using the digital input and output ports. These ports are

addressed using the I/O port address space of the 8088 or 80286 microcomputer.

The I/O port base address for the PCL-725 is selectable by an 8 position DIP

switch. Valid addresses are from hex 200 to hex 3FE. Refer to Figure 2.1 for the

location of the DIP switch (SW1).

PCL- 725 Installation

Figure 2.1 The PCL-725 Card

The required switch settings for various base addresses are illustrated as below :

Note : -ON = 0. OFF = 1

-"X" means "don't care"

-1..8 are switch positions

-A1..A8 correspond to address lines of the PC bus. A9 is

hard-wired to be 1.

-* means factory setting

PCL-725 Installation

-------------------------------------------------

I/O port switch position

address 1 2 3 4 5 6 7 8

(Hex) A8 A7 A6 A5 A4 A3 A2 Al

-------------------------------------------------

200-201 0 0 0 0 0 0 0 0

*2A8-2A9 0 1 0 1 0 1 0 0

2E8-2E9 0 1 1 1 0 1 0 0

2F8-2F9 0 1 1 1 1 1 0 0

3E8-3E9 1 1 1 1 0 1 0 0

3FE-3FF 1 1 1 1 1 1 1 1

2.3. Connector Pin Assignments

The PCL-725 card is equipped with a 37 pin D type connector accessible from

the rear plate. Please refer to Figure 2.1 for the location of the connector.

The following diagram below shows its pin assignments.

Legend:

DInL - digital input low, channeln

DInH - digital input high, channel n

GND -ground

NC n - normal close pin of relay n

NO n - normal open pin of relay n

COM n - common pin of relay n

PCL-725 Installation

NO 0 .1 20 . NO 3

COM 0 .2 21 . COM 3

NC 0 .3 22 . NC 3

NO 1 .4 23 . NO 4

COM 1 .5 24 . COM 4

NC 1 .6 25 . NO 5

NO 2 .7 26 . COM 6

COM 2 .8 27 . NO 6

NC 2 .9 28 . COM 6

NO 7 .10 29 . GND

COM 7 .11 30 . DI0L

DIOH .12 31 . DI1L

DI1H .13 32 . DI2L

DIZH .14 33 . DI3L

DI3H .15 34 . DI4L

DI4H .16 35 . DI5L

DI5H .17 36 . DI6L

DI6H .18 37 . DI7L

DI7H .19

2.4. Jumpers

There are two jumpers associated with each digital input channel for

configuring the channel as either isolated or non-isolated.

The following show the D/I channels and their corresponding jumpers :

D/I channel Jumpers

0JA0, JB0

1JA1, JB1

2JA2, JB2

3JA3, JB3

4JA4, JB4

5JA5, JB5

6JA6, JB6

7JA7, JB7

Examples are given here to illustrate how to configure the D/I channel. D/I

channel 1 is configured as isolated first, then non-isolated.

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