12. Standard Ports – Pin Assignment
CB 752 – User's Guide (Version 1.01)
12.1.3.
Serial Port COM2 (RS422/RS485) configured as RS422 (4-channel mode)
Pin Signal
Name
9-pin D-SUB connector (female)
1 TxD- (Transmit
Data-)
2 RxD+
(Receive
Data+)
3 TxD+
(Transmit
Data+)
4 RxD-
(Receive
Data-)
5 GND (Signal
Ground)
6
RTS- (Request to Send-)
7
RTS+ (Request to Send+)
8
CTS+ (Clear to Send+)
9
CTS- (Clear to Send-)
12.1.4.
Serial Port COM2 (RS422/RS485) configured as RS485 (4-wire mode), full duplex (bus master)
Pin Signal
Name
9-pin D-SUB connector (female)
1 TxD- (Transmit
Data-)
2 RxD+
(Receive
Data+)
3 TxD+
(Transmit
Data+)
4 RxD-
(Receive
Data-)
5 GND (Signal
Ground)
6 RTS- NC
7 RTS+
NC
8 CTS+
NC
9 CTS- NC
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