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© Sealevel Systems, Inc. R91001 Manual | SL9211 11/2022
Connectors:
Serial 1 – Serial 4
Description:
DB-9 Male
PIN RS-232
RS-422/485
1
DCD
RX+
6
DSR
NC
2
RX
RX-
7
RTS
NC
3
TX
TX-
8
CTS
NC
4
DTR
TX+
9
RI
NC
5
GND
GND
COM Port Assignments
Serial Port
Assignment
RS485 Expansion Port COM1
SERIAL1
COM2
SERIAL2
COM3
SERIAL3
COM4
SERIAL4
COM5