SMS-531 User’s Manual v1.1
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2.2 Appearance and Pin Assignments
Pin assignments of SMS-531
Power Input
Terminal No.
Pin
Assignment
N/A
01
N/A
02
N/A
03
N/A
GND
04
GND
Initial
05
Init
Power Input:
10 ~ 30 VDC
06
DC.+VS
07
DC.GND
Frame Ground
08
F.G
COM Port
Terminal No.
Pin
Assignment
COM3
RS-485
01
D-
02
D+
COM2
RS-232
03
TxD2
04
RxD2
05
GND
N/A
06
N/A
COM1
RS-232
07
TxD1
08
RxD1