Specification
Communications Interface
•
I/O Connection:
9-pin male D-sub connectors.
•
Serial Ports:
Shielded male D-sub 9-pin IBM AT style connectors
compatible with RS232, RS422 and RS485
specifications.
•
Character length:
5, 6, 7, or 8 bits.
• Parity:
Even,
odd
or
none.
•
Stop Interval:
1, 1.5, or 2 bits.
•
Serial Data Rates:
Up to 115,200 baud, asynchronous. A faster range of
rates, up to 460,800 baud, is achieved by jumper
selection on the card. Type 16550 buffered UART.
Caution
The OUT2 bit of the UART must be set low for proper interrupt driven communication. This bit
enables or disables the interrupts and the card will not communicate if the bit is pulled high.
RS232 Drivers
• Device:
75C185
Quad
Line
Transceivers.
•
Output Voltage:
+ 6VDC minimum, current limited to 10 mA.
•
Receiver threshold:
1.5V high, 0.75 low, Maximum input +30VDC.
RS422/RS485 Differential Communication Mode
•
Multipoint:
Compatible with RS422 and RS485 specifications. Up to
32 drivers and receivers allowed on line. Serial
communications ACE used is type 16550.
Driver/Receivers used are type 75ALS180.
•
Receiver Input Sensitivity:
+200 mV, differential input.
•
Common Mode Rejection:
+12V to -7V
•
Transmitter Output Drive Capability: 60 mA.
Environmental
•
Operating Temperature Range:
0 °C. to +60 °C.
•
Storage Temperature Range:
-50 °C. to +120 °C.
• Humidity:
5%
to
95%,
non-condensing.
Manual PCI-COM-2S
7
