
8 Connector Definitions
Pin RS 232 RS 422 RS 485 “4w” RS 485 “2w”
1 .nc.
2 DCD (3) Tx− (3) Tx− (3) Data− (3)
3 GND GND GND GND
4 CTS (3) CTS+ (3)
5 RxD (3) Tx+ (3) Tx+ (3) Data+ (3)
6 RI (4) CTS− (4)
7 DTR (4) Rx− (4) Rx− (4)
8 DSR (4) RTS− (4)
9 RTS (4) RTS+ (4)
10 TxD (4) Rx+ (4) Rx+ (4)
11 DCD (2) Tx− (2) Tx− (2) Data− (2)
12 GND GND GND GND
13 CTS (2) CTS+ (2)
14 RxD (2) Tx+ (2) Tx+ (2) Data+ (2)
15 RI (1) CTS− (1)
16 DTR (1) Rx− (1) Rx− (1)
17 DSR (1) RTS− (1)
18 RTS (1) RTS+ (1)
19 TxD (1) Rx+ (1) Rx+ (1)
20 RI (3) CTS− (3)
21 DTR (3) Rx− (3) Rx− (3)
22 DSR (3) RTS− (3)
23 RTS (3) RTS+ (3)
24 TxD (3) Rx+ (3)
25 DCD (4) Tx− (4) Tx− (4) Data− (4)
26 GND GND GND GND
27 CTS (4) CTS+ (4)
28 RxD (4) Tx+ (4) Tx+ (4) Data+ (4)
29 RI (2) CTS− (2)
30 DTR (2) Rx− (2) Rx− (2)
31 DSR (2) RTS− (2)
32 RTS (2) RTS+ (2)
33 TxD (2) Rx+ (2) Rx+ (2)
34 DCD (1) Tx− (1) Tx− (1) Data− (1)
35 GND GND GND GND
36 CTS (1) CTS+ (1)
37 RxD (1) Tx+ (1) Tx+ (1) Data+ (1)
Table 16: DB37 female Connector
Figure 29: DB37 female
Connector
July 2011 VScom Industrial Card User Manual 51
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