Isolated 422/485 Communication Card
AR-B9012
Features
2 serial 16C550 ports (16C550 w/16 byte FIFO for option)
Interface type: RS-422A or RS-485
Baud Rate: up to 115.2K bps
Can be set from COM1 to COM8
Port Signals: TXD, RXD, CTS and RTS
Isolation Voltage: 500VDC
Maximum transfer distance: 4000 feet
Terminator: 120 ohms (Enable/Disable selection switch)
Power requirement: 5V/250mA
Two or four wire operation
Dimensions: 175mm x 107mm
Specifications
General
Interface Type
Number of Ports Per Card
Maximum Transfer Distance
Baud Rate
Parity
Data Bits
Stop Bits
Port Signal
Connector
UART
Output Driver
Input Driver
Input Resistance
Termination Resistor
Signal Isolator
Power Isolator
Bus Type
RS-422A or RS-485
2
4000ft
50 to 115.2K
None, even, odd, mask or space
5, 6, 7 or 8 bits
1, 1.5 or 2 bits
TXD, RXD, CTS and RTS
D-type, 9pin, female
16C550
SN75175 or SN75173
SN75174 or SN75172
RS-422A 4K ohm; RS-485 12K ohm
120 ohm
PC900 for TXD and RXD, 4N35 for CTS and RTS, 5000Vrms isolation
DC to DC converter, 500 VDC isolation
8 bit ISA bus (If only first 4 IRQ used)
16 bits ISA bus (If 8 IRQ used)
Interrupt Channel
Power Requirement
Physical and Environmental
IRQ 2(9), 3, 4, 5, 10, 11, 12 and 15
5VDC/250mA
Operating Temp. : 0 to 60 Celsius degree
Storage Temp. : -25 to 85 Celsius degree
Humidity: 0% to 95%, non-condensing
Dimensions
175mm x 107mm
Ordering information:
Model No.
AR-B9012
Description
Isolated 422/485 Communication Card
Accessories
Disk: DOS Driver, Win31 Driver
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