Contec PIO-16/16B(PC)H Owner's manual

PIO-16/16B(PC)H

Digital I/O Board with Opto-Isolation

User’s Guide

PIO-16/16B(PC)H i

Copyright

No part of this document may be copied or reproduced in any form

by any means without prior written consent of CONTEC Co., LTD.

CONTEC Co., LTD. makes no commitment to update or keep

current the information contained in this document. The

information in this document is subject to change without notice.

All relevant issues have been considered in the preparation of this

document. Should you notice an omission or any questionable

item in this document, please feel free to notify CONTEC Co.,

LTD.

Regardless of the foregoing statement, CONTEC assumes no

responsibility for any errors that may appear in this document nor

for results obtained by the user as a result of using this product.

Trademarks

MS, Microsoft, MS-DOS and Windows are trademarks of Microsoft

Corporation. Other brand and product names are trademarks of their

respective holder.

PIO-16/16B(PC)Hii

Product Configuration

- PIO-16/16B(PC)H Board...1

- User’s Guide (this booklet)...1

Unpacking:

This board is specially packed in an anti-static bag to prevent

damage in shipping.

Check the contents to make sure that you have everything listed

above. If you do not have all the items, contact your distributor

or CONTEC group office where you purchased.

Note!

Do not remove the board from its protective packaging until the

computer case is open and ready for installation. Electrical static

can cause damage to electrical components.

PIO-16/16B(PC)H iii

Table of Contents

Copyright............................................................................i

Trademarks ........................................................................i

Product Configuration ..................................................... ii

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

About the PIO-16/16B(PC)H Board.............................1

Features.........................................................................1

Function ........................................................................2

Limited Three-Year Warranty......................................3

How to Obtain Service..................................................3

Liability.........................................................................3

About the Manual.........................................................4

2. Board Setup .............................................................5

Component Locations........................................................5

Setting I/O Addresses .......................................................6

Setting Method..............................................................7

Setting Interrupt Levels...................................................8

Setting Method..............................................................8

Selecting power supply...................................................10

3. External Connection ................................................11

Interface Connector.........................................................11

Connecting the Interface Connector..........................11

Interface Connector Pin Assignment.........................12

Input Circuit and Output Circuit...................................13

4. I/O Port Bit Assignment .......................................... 15

I/O Port Bit Assignment .................................................15

Input Port Bit Assignment.........................................15

Output Port Bit Assignment ......................................16

5. System Reference.................................................... 17

Block Diagram.................................................................17

Specification....................................................................18

PIO-16/16B(PC)Hiv

6. Appendix................................................................ 19

A. Interrupts on the IBM PC/AT and compatible

computers........................................................................19

Interrupt Levels and Vectors......................................20

How to Enable the Interrupt Function......................22

Information about setting up the interrupt

environment................................................................22

Sample Programs for Setting up the Interrupt

Environment...............................................................25

Restoring the Interrupt Environment.......................30

Sample Programs for Restoring the Interrupt

Environment...............................................................31

Processing of Interrupt Handler................................33

B. LSI Recovery Time .....................................................36

C. Sample Programs.......................................................38

Sample Input Program in Q-BASIC..........................38

Sample Input Program in Microsoft C.......................42

Sample Output Program in Q-BASIC .......................44

Sample Output Program in Microsoft C....................49

Sample Interrupt Program in Q-BASIC....................51

Sample Interrupt Program in Microsoft C................56

D. Protection Against Excess Voltage............................58

7. Index ..................................................................... 59

PIO-16/16B(PC)H v

List of Figures

Figure 2.1. Names and Factory Defaults of Parts........................ 5

Figure 2.2. Recommended I/O Addresses................................... 6

Figure 2.3. I/O Address Setting .................................................. 7

Figure 2.4. Disabling Interrupts.................................................. 8

Figure 2.5. Interrupt Settings....................................................... 9

Figure 2.6. Sample Interrupt Settings ......................................... 9

Figure 2.7. Power Supply Selecting.......................................... 10

Figure 3.1. Interface Connector.................................................11

Figure 3.2. Interface Connector Pin Assignments..................... 12

Figure 3.3. Input Circuit........................................................... 13

Figure 3.4. Output Circuit......................................................... 14

Figure 4.1. Input Port Bit Assignment ...................................... 15

Figure 4.2. Output Port Bit Assignment.................................... 16

Figure 5.1. Block Diagram....................................................... 17

Figure 6.1. Interrupt Controllers............................................... 20

Figure 6.2. DIP Switch Settings................................................ 38

Figure 6.3. Function Select Jumper Setting .............................. 38

Figure 6.4. Power Supply Selecting.......................................... 39

Figure 6.5. Flowchart for Sample Input Program...................... 40

Figure 6.6. DIP Switch Settings................................................ 44

Figure 6.7. Function Select Jumper Setting .............................. 44

Figure 6.8. Power Supply Selecting.......................................... 45

Figure 6.9. Flowchart for Sample Output Program................... 46

Figure 6.10. DIP Switch Settings................................................ 51

PIO-16/16B(PC)Hvi

Figure 6.11. Function Select Jumper Setting .............................. 51

Figure 6.12. Interrupt Jumper Settings........................................ 52

Figure 6.13. Power Supply Selecting.......................................... 52

Figure 6.14. Flowchart for Sample Interrupt Program................ 53

Figure 6.15. Examples of Anti-Surge Measures.......................... 58

List of Tables

Table 2.1. Example of I/O address range ..................................... 7

Table 5.1. Specifications............................................................ 18

Table 6.1. Addresses and Vectors in Interrupt Vector Table ....... 21

Table 6.2. Interrupt Levels and Interrupt Controller Data.......... 23

Table 6.3. Number of Times the IN Instruction must be Executed

for the 2EFh Port After Accessing the LSI................ 36

Introduction

PIO-16/16B(PC)H 1

1. Introduction

About the PIO-16/16B(PC)H Board

With an on board isolated 12VDC power supply, PIO-16/16B(PC)H

is a 16 channel isolated digital input and output interface board for

the IBM PC/AT and compatible computers. It can also be installed

into a CONTEC I/O expansion unit.

Features

- Photo-Insulated input/outputs providing improved noise

resistance

- Up to 16 (8 signals x 2 groups) input signals

- Up to 16 (8 signals x 2 groups) output signals

- Two input signals can also generate interrupt requests

- Up to 35VDC, 100mA per signal, max. output ability

- On board has an isolated 12VDC power supply for driving the

photo-isolation devices. Therefore you can select to use either

the on board 12VDC for your application or an external power

supply to drive the photo-isolation devices.

Introduction

PIO-16/16B(PC)H2

Function

- Input

This board installed on a personal computer (PC) inputs up to 16

digital signals in groups each consisting of eight signals from an

external device and passes them to the PC. The PC accesses this

board for input through the two arbitrarily configurable input ports.

When the IN instruction is executed to read data through any of

these input ports, the buffer gate corresponding to that input port

opens to receive the group of digital signals from the external

device. The signals sent to the PC at this time have negative logic.

Since the two signals among the 16 input signals are user-

assignable as interrupt inputs of the PC, the user can use them as

interrupt request signals.

- Output

This board writes up to 16 digital signals in groups each consisting

of eight signals to the external device. The PC accesses the board

for output through the two arbitrarily configurable output ports.

When the OUT instruction is executed to write data to any of these

output ports, the latch circuit corresponding to that output port

holds the data. The digital signals are then electrically insulated

by the photocoupler and output to the connected external device as

a group of signals via the transistor. The signals output to the

external device at this time have negative logic. The data in the

latch circuit remains intact until the OUT instruction is executed

again.

Introduction

PIO-16/16B(PC)H 3

Limited Three-Year Warranty

CONTEC Interface boards are warranted by CONTEC Co., LTD. to

be free from defects in material and workmanship for up to three

years from the date of purchase by the original purchaser.

Repair will be free of charge only when this device is returned

freight prepaid with a copy of the original invoice and a Return

Merchandise Authorization to the distributor or the CONTEC group

office, from which it was purchased.

This warranty is not applicable for scratches or normal wear, but

only for the electronic circuitry and original boards. The warranty

is not applicable if the device has been tampered with or damaged

through abuse, mistreatment, neglect, or unreasonable use, or if the

original invoice is not included, in which case repairs will be

considered beyond the warranty policy.

How to Obtain Service

For replacement or repair, return the device freight prepaid, with a

copy of the original invoice. Please obtain a Return Merchandise

Authorization Number (RMA) from the CONTEC group office

where you purchased before returning any product.

* No product will be accepted by CONTEC group without the

RMA number.

Liability

The obligation of the warrantor is solely to repair or replace the product.

In no event will the warrantor be liable for any incidental or

consequential damages due to such defect or consequences that arise

from inexperienced usage, misuse, or malfunction of this device.

Introduction

PIO-16/16B(PC)H4

About the Manual

This manual consists of the following chapters :

Chapter 1 Introduction

Chapter 2 Board Setup

This chapter explains how to set switches on the

board.

Chapter 3 External Connection

This chapter describes the interface connector and

external I/O circuits on the board.

Chapter 4 I/O Port Bit Assignment

This chapter describes the assignments and definitions

of the individual bits in the I/O ports on the board.

Chapter 5 System Reference

This chapter summarizes hardware specifications of

the board and provides circuit block diagrams.

Chapter 6 Appendix

This appendix provides a variety of useful reference

information on the board.

Chapter 7 Index

Board Setup

PIO-16/16B(PC)H 5

2. Board Setup

Component Locations

Figure 2.1. identifies the major parts on the board.

Note that the switch and jumper settings in the illustration below

indicate their factory defaults.

Figure 2.1. Names and Factory Defaults of Parts

Board Setup

PIO-16/16B(PC)H6

Setting I/O Addresses

This board is an I/O device controlled by input/output instructions

from by the personal computer. I/O devices include those built-in

the personal computer and expansion boards. I/O addresses are

numbers for distinguishing individual I/O devices. The I/O

address assigned to each I/O device is a four-digit hexadecimal

number, such as 0300H, used to identify that I/O device.

In general, each expansion board is controlled by using a range of

consecutive I/O addresses. Of these consecutive I/O addresses,

the first value is the I/O base address of the expansion board.

This board uses consecutive I/O addresses for the two ports.

Note!

The PC/AT and compatibles operate hardware devices by executing

I/O instructions on I/O address in a range of [0000H to FFFFH].

On these PCs, however, specific I/O addresses are used or reserved

by the system for the CRT, keyboard, and other controls as shown in

the address map found in their technical manual. That is, the user

cannot uses these system-assigned I/O addresses.

Although I/O addresses available to the user are limited, CONTEC

recommends the ranges of I/O addresses listed in Figure 2.2. for

use by this board.

Recommended I/O addresses

*300H to *31FH

*700H to *71FH

*B00H to *B1FH

*F00H to *F1FH (* : Any value from 0 to F)

Figure 2.2. Recommended I/O Addresses

Although these recommendations specify the three low-order digits

of each I/O address (in hexadecimal), you can select the high-order

digit freely from among 0 to F.

If your PC uses more than one expansion board, the I/O address

range occupied by each board must not overlap that for another.

If a LAN board has been installed on your PC, 300H to 31FH have

already been used for the board. Be careful not to assign an I/O

address range to this board, which conflicts with the I/O address

range for the LAN board.

Board Setup

PIO-16/16B(PC)H 7

Setting Method

Use the on-board DIP switches (SW1 and SW2) to set the I/O base

address of this board. Individual bits in the SW1 and SW2

correspond to the 15 high-order bits (A15 to A1) in the I/O base

address. Set A0 always to "0" (OFF).

The ON and OFF states of bits in the SW1 and SW2 correspond to

the binary values of "1" and "0" in the I/O base address,

respectively.

A7 A6 A5 A4 A3 A2 A1 A0

Binary

Hexadecimal

0 0 0 0

0

0 0 1 1

3

0 0 0 0

0

0 0 0 0

0

A15 A14 A13 A12 A11A10 A9 A8

1

2

3

4

5

6

7

8

O

F

SW1

1

2

3

4

5

6

7

8

O

F

SW2

Figure 2.3. I/O Address Setting

Figure 2.3. shows an I/O base address setting of 0300H, assigning

the I/O address range specified in Table 2.1. to this board.

Table 2.1. Example of I/O address range

Functions to be used General-purpose I/O function

I/O addresses 0300H to 0301H

to be occupied (2 ports)

Board Setup

PIO-16/16B(PC)H8

Setting Interrupt Levels

This board can use signals, such as two digital signals among 16

input signals, as interrupt request signals. These signals are used

to issue interrupt requests to the PC, making the interrupt functions

of the PC available. Use the on-board jumper (JP1) to set interrupt

levels.

To disable interrupts, use lead strapping connectors to prevent input

signals from being connected to specific levels.

To enable interrupts, use the on-board jumper (JP1) to set interrupt

levels. The interrupt levels set for this board are IRQs 3 to 7, 9 to

12, 14, and 15. Set those not used for the PC and for any other

board. Up to two levels of interrupt request signals can be

assigned, corresponding to input signals on a one-to-one basis.

Notes!

(1) When using interrupts, set interrupt levels which are not used

for any other resource.

(2) Do not plug or unplug any strapping connector on the JP1

when power has been supplied to the PC (or I/O expansion

unit) on which this board has been installed.

Setting Method

Use the on-board jumper (JP1) to set interrupt levels.

Disabling Interrupts

10

JP1

IRQ

SIG

IRQ

11 12 14 15

9 3 4 5 6 7

1

2

Figure 2.4. Disabling Interrupts

Board Setup

PIO-16/16B(PC)H 9

Enabling Interrupts

Use strapping connectors to connect input signals to the interrupt

levels you want to assign. The assignable interrupt levels are

IRQs 3 to 7, 9 to 12, 14, and 15. Note, however, that IRQs 10 to

15 cannot be used on PCs with XT (8-bit) buses.

JP1

I02 (4)

I00 (2)

IRQ

1 2

9 3 4 5 6 7

1 0 1 1 1 2 1 4 1 5

Figure 2.5. Interrupt Settings

Example : To connect SIG1(I02) from the interface board to

IRQ10 on the PC/AT as an interrupt request signal,

set the JP1 as shown below :

JP1

IRQ

SIG

IRQ

Interrupt level

Interrupt signal

Interrupt level

IRQ

Connection

cable

External I/O

SIG1(I02)

SIG2(I00)

IBM PC/AT (input module)

10

11

12

14

15

9

3

4

5

6

7

1

2

9

3

4

5 6

7

1 0

1 1

1 2

1 4 1 5

Figure 2.6. Sample Interrupt Settings

Board Setup

PIO-16/16B(PC)H10

Selecting power supply

The photo-insulation circuits need power supply that cannot be

supplied directly from the PC system, for isolation purpose. This

board equips an on board isolated power supply (12VDC, 250mA) for

driving photo-insulation circuits. You can select to use this internal

power supply or use an external power supply for driving the photo-

insulation circuits in unit of two ports (16 channels) per common.

Notes!

- When the internal power supply is used, the input section of this

board consumes up to 64mA current maximum and the output

channel switching section consumes up to 16mA current

maximum. Note that the output current that can be supplied to

the external device is therefore 170mA maximum in case you use

internal power supply for all the input and output channels.

- Never use the isolated on board 12VDC together with an

external power supply. That may damage the isolated 12VDC

supply.

Setting method

Jumpers JP3 to JP6 are used to select the power supply for photo-

insulation circuits. Refer following table for details.

1 2 3

GND

JP4

1 2 3

JP3

+12V

GND

JP4

JP3

+12V

GND

JP6

1 2 3

JP5

+12V

GND

JP6

1 2 3

+12V

JP5

Output Port 0

Output Port 1

Supply to

Input Port 0

Input Port 1

Use Internal Power

(Factory defaults)

Use External Power

Figure 2.7. Power Supply Selecting

Notes!

- Default setting is using internal power supply.

- These jumpers must be set in pairs.

External Connection

PIO-16/16B(PC)H 11

3. External Connection

Interface Connector

Connecting the Interface Connector

To connect an external device to this board, plug the cable from the

device into the interface connector (CN1).

Figure 3.1. Interface Connector

Optional Cables

Flat cable with 37-pin D-SUB connectors at either end:

- PCB37P-1.5 (1.5m)

- PCB37P-3 (3m)

- PCB37P-5 (5m)

Shielded cable with 37-pin D-SUB connectors at either end:

- PCB37PS-0.5P (0.5m)

- PCB37PS-1.5P (1.5m)

- PCB37PS-3P (3m)

- PCB37PS-5P (5m)

Flat cable with a 37-pin D-SUB connector at one end:

- PCA37P-1.5 (1.5m)

- PCA37P-3 (3m)

- PCA37P-5 (5m)

External Connection

PIO-16/16B(PC)H12

Shielded cable with a 37-pin D-SUB connector at one end:

- PCA37PS-0.5P (0.5m)

- PCA37PS-1.5P (1.5m)

- PCA37PS-3P (3m)

- PCA37PS-5P (5m)

Optional Accessories

Screw Terminal : EPD-37

Termination Panel : DTP-3(PC)

Termination Panel : DTP-4(PC)

Signal Monitor for Digital I/O : CM-32(PC)E

Interface Connector Pin Assignment

To connect an external device to this interface board, plug it into the

on-board 37-pin connector.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

N0

*I 00

I 01

*I 02

I 03

I 04

I 05

I 06

I 07

I 10

I 11

I 12

I 13

I 14

I 15

I 16

I 17

P0

N.C.

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

N1

O 00

O 01

O 02

O 03

O 04

O 05

O 06

O 07

O 10

O 11

O 12

O 13

O 14

O 15

O 16

O 17

P1

+0 port

(Input)

+1 port

(Input)

+0 port

(Output)

+1 port

(Output)

Common minus pin for

+0/+1 output port

Common plus pin for

+0/+1 input port

Common plus pin for

+0/+1 output port

Common minus pin for

+0/+1 intput port

*I00 and *I02 are also used as interrupt signals

Figure 3.2. Interface Connector Pin Assignments

External Connection

PIO-16/16B(PC)H 13

Input Circuit and Output Circuit

Input Circuit

The input circuit of this board is illustrated in following Figure.

The on-board photocouplers isolate internal input circuits from

outside devices. The input channels are to be connected with

current sinking output signals. You need an additional power

supply that is isolated from the PC system to drive these insulation

circuits. When you use a 12VDC power (internal or external),

each input channel will consumes about 4mA current; when 24VDC

external power supply is selected, each input channel will consumes

about 8mA current.

Note!

You cannot connect an external power supply and in the mean time

select to use internal isolated power. To use an external power

supply, set the power supply select jumpers for External Power in

pair and then connect the external power supply as shown with

dotted lines in the following illustration.

Vcc

5.1k

Ω

Vcc

5.1kΩ

JP5

JP6

+12V

Board

Photocoupler

Input

External

Device

External

Power

Supply

DC12V

~24V

Plus

Common

Input

3kΩ

Photocoupler

3kΩ

Figure 3.3. Input Circuit

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Contec PIO-16/16B(PC)H Owner's manual

Contec PIO-16/16B(PC)H Owner's manual

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