Acrosser Technology AR-B2104 User manual

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COPYRIGHT
Copyright 1995 by Acrosser Technology Co., Ltd. All rights re-
served. No part of this publication may be reproduced, transmit-
ted, transcribed, stored in a retrieval system, or translated into
any language or computer language, in any form or any means,
electronic, mechanical, magnetic, optical, chemical, manual or
otherwise, without the prior written consent of Acrosser Technol-
ogy.
Acrosser, IBM, PC/XT/AT are registered trademarks.
DISCLAIMER
Acrosser Technology makes no representations or warranties
with respect to the contents hereof and specifically disclaims
any implied warranties of merchantability or fitness for any par-
ticular purpose. Further more, Acrosser Technology reserves
the right to revise this publication and to make changes from
time to time in the contents hereof without obligation of Acrosser
Technology to notify any person of such revision or changes.

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RETURNING YOUR CARD FOR SERVICE
If your card requires servicing, contact the dealer from whom
you purchased the product for service information. If you need to
ship your card to us for service, be sure it is packed in a protec-
tive carton. We recommend that you keep the original shipping
container for this purpose.
You can help assure efficient servicing of your product by follow-
ing these guidelines:
1. Include your name, address, telephone and facsimile num-
ber where you may be reached during the day.
2. A description of the system configuration and/or software
at the time of malfunction.
3. A brief description of the symptoms.
TECHNICAL SUPPORT AND USER COMMENTS
User comments are always welcome as they assist us in im-
proving the usefulness of our products and the understanding of
our publications. they form a very important part of the input
used for product enhancement and revision.
We may use and distribute any of the information you supply in
any way we believe appropriate without incurring any obligation.
You may, of course, continue to use the information you supply.
Please send your comments to Acrosser Technology Co., Ltd.
or your local sales representative.

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STATIC ELECTRICITY PRECAUTIONS
Before removing the board from its anti-static bag, read this
section about static electricity precautions.
Static electricity is a constant danger to computer systems. The
charge that can build up in your body may be more than suffi-
cient to demage integrated circuits on any PC board. It is, there-
fore, important to observe basic precautions whenever you use
or handle computer components. Although areas with humid cli-
mates are much less prone to static build-up, it is always best to
safeguard against accidents which may result in expensive re-
pairs. The following measures should generally be sufficient to
protect your equipment from static discharge:
1. Touch a grounded metal object to discharge the static elec-
tricity in your body (or ideally, wear a grounded wrist strap).
2. When unpacking and handling the board or other system
component, place all materials on an antic static surface.
3. Be careful not to touch the components on the board, espe-
cially the "golden finger" connectors on the bottom of every
card.

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CHAPTER 1 INTRODUCTION
1.1 GENERAL DESCRIPTION
The AR-B2104 card is an inexpensive 24 channel opto-isolated
open-collector output interface card for IBM PC/XT/AT or com-
patible computers. It can be easily installed in any I/O slot inside
the computer while I/O connections are made through a 37-pin
D-type connector which extends out the rear of the computer. All
outputs feature high-voltage (50V max.) outputs with common-
cathode clamp diodes for switching inductive loads. The collec-
tor-current rating of each darlington pair is 500 milliamperes.
The AR-B2104 can be used in various applications including
relay drivers, hammer drivers, lamp drivers, display drivers
(LED and gas discharge), line drivers, and logic buffers.
The AR-B2104 is configured as three independent 8-bit ports.
Controlling the outputs is as simple as writing an 8-bit word to
either of the ports. The output status can be read back by read-
ing the same address for verification. A power-up reset scheme
is implemented to insure that all outputs stay in their power-off
(high impedance) state when power is first applied to the host
computer. Each channel is equipped with an LED indicator for
monitoring its ON/OFF status.
AII external I/O devices are connected through a 37 pin D-type
connector. Connection to the AR-B2104 can be greatly simpli-
fied by adding the optional AR-B9007 screw terminal board.

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1.2 FEATURES
# 24 photo-couple isolated open-collector output
# Output status read back
# 2500 Vrms isolation
# Up to 0.5A/50V of output driving capacity
# 24 LED status indicators
# D-type 37-pin connector
# Easy to use
1.3 ORDERING INFORMATION
The following lists and describes part numbers for the AR-
B2104 cards and its accessories.
Part Number Description
AR-B2104 24 channels photo-couple isolated
open-collector output card with user’s
m
AR-B9007 37-pin screw terminal board for AR-B2
with 0.6m flat cable

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CHAPTER 2 INSTALLATlON
Before using your AR-B2104, you must set the base address of
the I/O port. This chapter provides information on how to set the
base address switch. Pin assignments of the I/O connector is
also provided. Figure 1-2 shows the switch and component lo-
cations of the AR-B2104 card.
2.1 BASE ADDRESS SETTING
There is one DIP switch (SW1) located on the AR-B2104 card. It
is used to select the base port address of the AR-B2104. The
operation of AR-B2104 is controlled through the output ports.
Three consecutive I/O ports are used by the AR-B2104. The
base address of these output ports are selected by using base
address switch SW1. The AR-B2104 is factory-configured for a
base address of 3E0 Hex. lf this base address is already occu-
pied, you will need to change the base address switch setting. lt
is essential that each peripheral device, such as an AR-B2104,
be assigned a unique base address within the range of 100 to
3FC Hex. and that the address is on a 4-byte boundary. Use
Table 2-1 (next page) as a guide to select an unoccupied ad-
dress.

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HEX RANGE DEVICE
00-FF Reserved For System
170-178 Fixed Disk 1
1F0-1F8 Fixed Disk 0
201 Game Port
208-20A EMS Register 0
218-21A EMS Register 1
278-27F Parallel Printer Port 3 (LTP3)
2E8-2EF Serial Port 4 (COM4)
2F8-2FF Serial Port 2 (COM2)
300-31F Prototype Card/Streaming Type Adapter
378-37F Parallel Printer Port 2 (LTP 2)
380-38F SDLC, Bisynchronous 2
3A0-3AF Bisynchronous 1
3B0-3BF Monochrome Display and Parallel Printer Port 1
3C0-3CF EGA/VGA Adapter
3D0-3DF Color/Graphics Monitor Adapter
3E8-3EF Serial Port 3 (COM3)
3F0-3F7 Diskette Controller
3F8-3FF Serial Port 1
(
COM1
)
Table 2-1 I/O port address map

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The following shows the base address switchs (SW1) and their
respective address line.
SW1 ADDRESS Address Value
LINE Hex. Dec.
Switch 8 A2 4 4
Switch 7 A3 8 8
Switch 6 A4 10 16
Switch 5 A5 20 32
Switch 4 A6 40 64
Switch 3 A7 80 128
Switch 2 A8 100 256
Switch 1 A9 200 512
BASE ADDRESS =
200*A9+100*A8+80*A7+40*A6+20*A5+10*A4+8*A3+4*A2
(Hex.)
or
512*A9+256*A8+128*A7+64*A6+32*A5+16*A4+8*A3+4*A2
(Dec.)
A9.....A2 = 1 If switch is ON
A9.....A2 = 0 If switch is OFF
Setting the switch to the "ON" position indicates logical "1" and
setting the switch to the "OFF" poition indicates logical "0". The
following switch (next page) setting represents an address of
3E0 Hex.

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ON
12345678
SW1
2.2 MAIN I/O CONNECTOR
The AR-B2104 is equipped with one 37-pin D-type male con-
nector to control open-collector output. This connector and its
signal conductor functions are described in the following table.

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PIN FUNCTION PIN FUNCTION
1 CH1 20 CH20
2 CH2 21 CH21
3 CH3 22 CH22
4 CH4 23 CH23
5 CH5 24 CH24
6 CH6 25 Dcom
7 CH7 26 Dcom
8 CH8 27 Dcom
9 CH9 28 Ground
10 CH10 29 Ground
11 CH11 30 Ground
12 CH12 31 Ground
13 CH13 32 Ground
14 CH14 33 Ground
15 CH15 34 Ground
16 CH16 35 Ground
17
CH17
36
Ground
Ground : Common ground (external power ground)
Dcom : Common-cathode of clamp diodes (Must be con-
nected to external power V+ when controlling inductive

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load)
2.3 BOARD INSTALLATION
This section provides general instructions for installing the AR-
B2104 card. For more detailed information regarding installa-
tion of peripheral boards, consult the documentation provided
with your computer.
Warning: Turn off your PC power supply whenever install-
ing or removing any adapter board.
Installing the AR-B2104 card in your computer:
1. Set the base address switch as described in Section 2.1.
2. Turn off the power of the computer and any peripheral devic-
es.
3. Unplug the power cord from the electrical outlet. Make a note
concerning location of all the cables and cords attached to
the rear of the system unit and then disconnect.
4. Remove the system unit cover (refer to your computer user's
guide if necessary).
5. Choose an available option slot. Remove the screw that se-
cures the expansion slot cover to system unit.
6. Hold the AR-B2104 in one hand. With the other hand, touch
any metallic part of the computer's cabinet. This will safely
discharge any static electricity which has built-up in your
body.
7. Align the gold edge connector with the edge socket and in-
stall the back adapter with the adapter plate screw. Gently
press the board downward into the socket. Re-install the
adapter plate screw.
8. Replace the system unit cover.

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9. Connect all cables and cords you previously removed in step
3.
CHAPTER 3 REGISTERS AND PROGRAMMIMG
3.1 OUTPUT REGISTERS
The AR-B2104 occupies 4 consecutive addresses in the PC I/O
address space of which only three addresses are actually used.
The base or starting address is selected during the installation
procedure. The three registers of the AR-B2104 are located as
follows:
ADDRESS OUTPUT REGISTER INPUT STA
T
BASE+0 Port 1 (write) Port 1 (re
a
BASE+1 Port 2 (write) Port 2 (re
a
BASE+2 Port 3 (write) Port 3 (re
a
BASE+3 Not used Not use
d
Note that all ports are 8 bits (one byte) wide and require byte
oriented write operations rather than word operations. AII out-
puts in a port are updated simultaneously. Writing a low (0) to a
channel within a port deactivates (high impedance) the output.
Writing a high (1) to a channel activates (reach to common

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ground) it. The following describes the output registers and their
respective channels.
Data Bit BASE+0 BASE+1 BASE+2
D7 CH8 CH16 CH24
D6 CH7 CH15 CH23
D5 CH6 CH14 CH22
D4 CH5 CH13 CH21
D3 CH4 CH12 CH20
D2 CH3 CH11 CH19
D1 CH2 CH10 CH18
D0 CH1 CH9 CH17
When the output is energized, the status LED indicator wiIl light
up to indicate an active input.
3.2 PROGRAMMING
No driver is supplied with the AR-B2104 since the program is
very simple and can be accomplished most efficiently using di-
rect I/O instructions, in what ever application language is used
(Basic, C, Assembly, Pascal, etc.). For example, assume you
wish to turn on channel 7. Also assume the AR-B2104 board
has been set to base address 992 (3E0 Hex.). To turn on chan-
nel 7, you simply need to write a 01000000 to base address
992. Likewise to turn on channel 10, 12 and 14 on the same

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board simply write a 42 decimal (00101010 binary or 2A Hex.)
to I/O address 993 (3E1 Hex).
The following example are in BASICA language but can easily
be translated to other languages:
Example: Assume the AR-B2104 is installed at base address
992 (3E0 Hex.).
To turn on channel 1, 10, and 22 write as follows:
1000 BASE_PORT = &H3E0 : REM Base I/O address
1010 OUT BASE_PORT,1 : REM Turns channel 1 ON
1020 OUT BASE_PORT+1,2 : REM Turns channel 10 ON
1030 OUT BASE_PORT+2,&H20 : REM Turns channel 22 ON
To control the desired outputs but make no effect to other out-
puts, write as follows:
2000 BASE_PORT = &H3E0 : REM
Base I/O address
2010 PORT1=(INP(BASE_POPT) OR 1) : REM
Read back port 1 staus and set bit of channel 1
2020 OUT BASE_PORT,PORT1 : REM
Turns channel 1 ON
2030 PORT2=(INP(BASE_POPT+1) OR 2) : REM
Read back port 2 staus and set bit of channel 10
2040 OUT BASE_PORT+1,PORT2 : REM
Turns channel 10 ON
2050 PORT3=(INP(BASE_POPT+2) OR &H20) : REM
Read back port 3 staus and set bit of channel 22

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2060 OUT BASE_PORT+2,PORT3 : REM

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Turns channel 22 ON
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CHAPTER 4 APPLICATION AND MAINTENANCE
4.1 APPLICATION
The following figure shows the connections of AR-B2104 con-
trolling inductive loads and resistive loads. The Dcom signal
(common-chthode of diodes) could be left open for controlling
resistive loads, but, if the inductive load is to be controlled, it is
necessary to connect the Dcom signal with the external power
V+ for bypassing the reverse surge generated by inductive
loads.
Inductive LoadResistive Load
V+V+
Open
V-V-
Channel nnChannel nn
4.2 MAINTENANCE
AII of the opto-isolators and open-collectors on AR-B2104 are in
sockets. If they are damaged by external shorts, transients,
overload, etc., they are serviceable by simply unpluging and re-
placing the damged ones with new parts. The manufacturer can
service your board. If you wish to make simple repairs for your-
self, Table 4-1 provides a list of opto-isolators, open-collector
drivers, and LEDs with their respective channels.

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CHANNEL LED Photo Couple Open-Collector
Driver
1 LED1
U13
U19
2 LED2
3 LED3
4 LED4
5 LED5
U14
6 LED6
7 LED7
U20
8 LED8
9 LED9
U15
10 LED10
11 LED11
12 LED12
13 LED13
U16
U21
14 LED14
15 LED15
16 LED16
17 LED17
U17
18 LED18
Table 4-1

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APPENDIX A SPECIFICATIONS
Number of Outputs: 24 opto-isolated open-collector out-
puts.
Isolation: 2500V rms.
Rated Collector Voltage: 50V DC.
Rated Collector Current: 500 mA.
Inductive Load Protection: Output clamp diodes for each chan-
nel
Turn-On Time: 20 us maximum.
Turn-Off Time: 20 us maximum.
Bounce Time: None.
Active Indicators: 24 LED indicators.
I/O Port Address: Switch selectable from 000H to
3FCH with increments of 4.
Power Consumption: +5V DC 250 mA maximum.
Dimensions: 175 mm(W) * 108 mm (H).
Weight: 180g.