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FPC-8057 User's Manual
2.3.2 COM2 [RS-232] & COM3 [RS-422/485]
The 9 Pin, male, SUB-D, COM2 [RS-232] & COM3 [RS-422/485] Port
on the back of the unit is the downloading port (PC Connector) and RS-
485/422 communications port for connecting to a device.
Connector COM2 [RS-232] & COM3 [RS-2422/485]
Pin Designations
Pin#
Symbol
1
GND
2
Tx+
3
Tx-
4
Rx+
5
Rx-
6
GND
7
RxD
8
TxD
9
Not used
16
COM2
(RS-232)
(RS-422)
GND
GND
RS-422 Transmit
RS-422 Transmit
RS-422 Receive
RS-422 Receive
Receive
Transmit
COM3
COM3
(RS-485)
GND
Data+
Data
Installation Instructions
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