Acrosser Technology AR-B2001 User manual

ACROSSER TECHNOLOGY
1
CHAPTER 1
INTRODUCTION
1.1 GENERAL DESCRIPTION
The AR-B2001 card is an inexpensive 16 chan-
nel photo-couple isolated digital input interface
card for IBM PC/XT/AT personal computers and
their compatibles. The AR-B2001 can be used in
various applications including: external switch
sensing, contact closure and external voltage
sensing.
The individual 16 input channels can be config-
ured as dry contact input mode or voltage input
mode. It can be driven from 3 to 30V DC control
voltage. Additional resistance can be added to
the AR-B2001 externally to extend the input volt-
age range.
16 LEDs are provided to indicate the status of
each input channel. All of the photo-couple com-
ponents are installed on IC sockets for easy
maintenance and replacement.

2
ACROSSER TECHNOLOGY
1.2 FEATURES
16 channels opto-isolated digital input
Dry contact or voltage input mode jumper se-
lectable
I/O address switch selectable between 000H
to 3FCH.
16 LED status indicators
2250 Vrms isolation
FRC 34-pin connector
Easy to use
1.3 ORDERING INFORMATION
Following lists and describes part numbers for
the AR-B2001 boards and its accessories.
Part Number Description
AR-B2001 16 channel optical isolated digital input card with user’s
manual
AR-B9006 36-pin screw terminal board for AR-B2001 with 0.6m flat
cable

ACROSSER TECHNOLOGY
3
The AR-B2001 Functional Block Diagram

4
ACROSSER TECHNOLOGY
This page intentionally left blank

ACROSSER TECHNOLOGY
5
CHAPTER 2
INSTALLATION
Before using your AR-B2001, you must configure
its input mode and set the I/O port base ad-
dress. This chapter provides information about
setting the jumpers and switches. Pin assign-
ment of the I/O connector are also provided. Fig-
ure 2-1 shows the jumper, switch and component
locations of the AR-B2001 card.
2.1 BASE ADDRESS SETTINGS
There is one DIP switch located on the AR-
B2001 card. It is used to select the base port
address of the AR-B2001. The operation of AR-
B2001 is controlled through the input ports. Four
consecutive I/O ports are used by AR-B2001.
The Base Address of these I/O ports is selected
by using Base Address switch SW1. The AR-
B2001 is factory configured for a Base Address
of 3E0 Hex. If this Base Address is already oc-
cupied, you will need to change the Base Ad-
dress switch setting. It is essential that each pe-
ripheral device, such as an AR-B2001, be as-
signed a unique Base Address within the range
of 200 to 3fc Hex and that the address is on a
4-byte boundary. Figure 2-2 shows the Base Ad-
dress Switch. Use Table 2-1 as an aid for se-
lecting an unoccupied Address.

6
ACROSSER TECHNOLOGY
Figure 2-1 AR-B2001 Board Layout.

ACROSSER TECHNOLOGY
7
DIP SW ADDRESS Address Value
LINE Hex. Dec.
Switch 1 A2 4 4
Switch 2 A3 8 8
Switch 3 A4 10 16
Switch 4 A5 20 32
Switch 5 A6 40 64
Switch 6 A7 80 128
Switch 7 A8 100 256
Switch 8 A9 200 512
Table 2-1 Base Address switch
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 = 0 If switch is ON
A9.....A2 = 1 If switch is OFF
Setting the switch to the "ON" position indicates
logical "0" and setting the switch to the "OFF"
poition indicates logical "1". The following switch
setting represents an address of 3E0 Hex.

8
ACROSSER TECHNOLOGY
ON
12345678
DIP
SW
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)
378-37F Parallel Printer Port 2 (LTP 2)
3B0-3BF MonO Display and Parallel Port 1 (LPT1)
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 2-2 IBM PC I/O Address Map

ACROSSER TECHNOLOGY
9
2.2 INPUT MODE SETTINGS
There are 16 jumper blocks which are used to
set either dry contact input mode or voltage input
mode. Each jumper block selects the input mode
for one individual channel.
Table 2-3 lists these jumper blocks and their re-
spective channels.
Jumper Bolck Channel Port
JP1 0 Bit 0 of port 1
JP2 1 Bit 1 of port 1
JP3 2 Bit 2 of port 1
JP4 3 Bit 3 of port 1
JP5 4 Bit 4 of port 1
JP6 5 Bit 5 of port 1
JP7 6 Bit 6 of port 1
JP8 7 Bit 7 of port 1
Table 2-3 Relationship Between Jumper Blocks
and Input Channels

10
ACROSSER TECHNOLOGY
Jumper Bolck Channel Port
JP9 8 Bit 0 of port 2
JP10 9 Bit 1 of port 2
JP11 10 Bit 2 of port 2
JP12 11 Bit 3 of port 2
JP13 12 Bit 4 of port 2
JP14 13 Bit 5 of port 2
JP15 14 Bit 6 of port 2
JP16 15 Bit 7 of port 2
Table 2-3 Relationship Between Jumper Blocks
and Input Channels (continued)
To select dry contact input mode, insert the
jumpers into the right side of the jumper block.
JP1 to JP16
(Dry contact input)

ACROSSER TECHNOLOGY
11
To select voltage input mode, insert the jumpers
into the left side of the jumper block.
JP1 to JP16
(Voltage input)
2.3 MAIN I/O CONNECTOR
The AR-B2001 is equipped with one 34-pin,
FRC male connector to access digital input. This
connector and its signal conductor functions are
described in Table 2-4
Pin Function Pin Function
1 V+ Channel 0 2 V+ Channel 8
3 V- Channel 0 4 V- Channel 8
5 V+ Channel 1 6 V+ Channel 9
7 V- Channel 1 8 V- Channel 9
9 V+ Channel 2 10 V+ Channel 10
11 V- Channel 2 12 V- Channel 10
13 V+ Channel 3 14 V+ Channel 11
15 V- Channel 3 16 V- Channel 11
Table 2-4 Main Connector

12
ACROSSER TECHNOLOGY
Pin Function Pin Function
17 V+ Channel 4 18 V+ Channel 12
19 V- Channel 4 20 V- Channel 12
21 V+ Channel 5 22 V+ Channel 13
23 V- Channel 5 24 V- Channel 13
25 V+ Channel 6 26 V+ Channel 14
27 V- Channel 6 28 V- Channel 14
29 V+ Channel 7 30 V+ Channel 15
31 V- Channel 7 32 V- Channel 15
33 External V- 34 External V+
Table 2-4 Main Connector (continued)
2.4 BOARD INSTALLATION
This section provides general instructions for in-
stalling the AR-B2001 card. For more detailed
information regarding installation of peripheral
boards, consult the documentation provided with
your computer.
WARNING :
TURN OFF YOUR PC POWER SUPPLY
WHENEVER INSTALLING OR REMOVING
ANY ADAPTER BOARD.

ACROSSER TECHNOLOGY
13
Installing the AR-B2001 card in your computer:
1. Set the switches and jumpers as described in
Section 2.1 and 2.2.
2. Turn off the power of the computer and any
peripheral devices.
3. Unplug the power cord from the electrical out-
let. Make a note concerning the location of all
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 secures the expansion slot cover
to the system unit.
6. Hold the AR-B2001 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
of the socket and install 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.
9. Connect all cables and cords you previously
removed in step 3.

14
ACROSSER TECHNOLOGY
This page intentionally left blank

ACROSSER TECHNOLOGY
15
CHAPTER 3
REGISTERS AND PROGRAMMING
3.1 INPUT REGISTERS
The AR-B2001 occupies 4 consecutive ad-
dresses in the PC I/O address space of which
only two addresses are actually used. The base,
or starting address, is selected during the instal-
lation procedure and will automatically fall on a
four byte boundary. The two registers of the AR-
B2001 are located as follows:
ADDRESS INPUT STATUS
BASE+0 Isolated input port 1
BASE+1 Isolated input port 2
BASE+2 Not used
BASE+3 Not used
Table 3-1 I/O Map
Note that all ports are 8 bits (one byte) wide and
require byte oriented read operations rather than
word oriented read operations.

16
ACROSSER TECHNOLOGY
Each of the 8 bits within the byte corresponds to
a particular digital input. A high bit (=1) signifies
the input is de-energized and a low bit (=0) sig-
nifies the input is energized. When the input is
energized the status LED will be light up to indi-
cate a active input.
Base + 0
D7 D6 D5 D4 D3 D2 D1 D0
CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0
Base + 1
D7 D6 D5 D4 D3 D2 D1 D0
CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8
3.2 PROGRAMMING
No driver is supplied with the AR-B2001, since
programming is very simple. This can be accom-
plished most efficiently using direct I/O instruc-
tions in any chosen application language (Basic,
C Assembly, Pascal, etc.). The following ex-
ample is in BASIC but can be translated into
other programming languages:
xxx00 BASE = &h300 'Base I/O address
xxx10 Y% = INP(base+1)'Read Back CH8 to
CH15

ACROSSER TECHNOLOGY
17
CHAPTER 4
APPLICATIONS
The input mode of each channel can be config-
ured as dry contact mode or voltage input mode.
This chapter describes how to connect the input
signals with the AR-B2001 card.
4.1 CONNECTING TO DRY CONTACT INPUT
To use AR-B2001 as dry contact input, please
follow the following steps:
1. Set the jumper blocks of respective channels
at the dry contact input mode position.
2. Connect an external voltage input (5 VDC to
30 VDC) to pin 33 & 34 of CN2. Connect pin
34 to positive and pin 33 to negative.
3. Connect the V+ and V- of an input channel to
a dry contact such as a switch, relay or push
bottom switch etc.
Figure 4-1 shows how to connect a dry contact
to AR-B2001.

18
ACROSSER TECHNOLOGY
+5V
V-
EV-
1K/1W
V+
EV+
+
-
Vext(5-30VDC) AR-B2001
Field side
Figure 4-1 Connection of Dry Contact Input
4.2 CONNECTING TO VOLTAGE INPUT
Figure 4-2 and Figure 4-3 explain how to con-
nect a contact input with a voltage or photo sen-
sor to the AR-B2001 card.
+5V
V+
V-
1K/1W
Vext(0-30VDC)
AR-B2001
Figure 4-2 Connection of Voltage Input

ACROSSER TECHNOLOGY
19
+5V
V+
V-
1K/1W
AR-B2001
Vss
Photo
sensor op
Figure 4-3 Connecting to Photo Sensor or Open
Collector Output
4.3 EXPANDING THE VOLTAGE INPUT
RANGE
Note that the current flowing through the 4N35
photo isolator is limited to less than 30 mA. If
your input voltage is greater than 30 VDC, an
external current limitation resistor must be put in
series with the voltage input as shown in Figure
4-4. The AR-B9006 general purpose terminal
board is available to add external resistors in
series with input.
+5V
V+
V-
1K/1W
+
-Vext(>30VDC)
AR-B2001
Rext

20
ACROSSER TECHNOLOGY
Figure 4-4 Expanding the Voltage Input Range
The resistance of Rext is calculated according to
the following rules and equation.
(1) Current flow through input channel can not
excess 30 mA.
(2) Current flow through input channel can not
be less then 5 mA when input is active.
(3) 5mA <= (Vext - 1.2)/(Rext + 1K) <= 30 mA
(4) The power generated by Rext must meet the