Westermo RV-07B - Manual (Page 11)

11 6130-2200
9-pos
D-sub
Direction* Description
1 Out Data Carrier Detect (DCD)
2 Out Received Data (RD)
3 In Transmitted Data (TD)
4 In Data Terminal Ready (DTR)
5 – Signal Ground (SG)
6 Out Data Set Ready (DSR)
7 In Request To Send (RTS)
8 Out Clear To Send (CTS)
9 Out Ring Indicator (RI)
2-pos
External
Direction* Description Product marking
1 In Common voltage COM
2 In + Voltage +V
9-pos
RS-422/485/
PSTN/
Leased line
Direction* Description
Product
marking
1 In R+ (EIA RS-485 A’) R+
2 In R– (EIA RS-485 B’) R–
3 In/Out T+ (EIA RS-485 A) T/R+
4 In/Out T– (EIA RS-485 B) T/R–
5 – Not used NC
6 In/Out PSTN /LL 4-wire transmit/ LL 2-wire Receive/transmit –
7 In/Out PSTN /LL 4-wire transmit/ LL 2-wire Receive/transmit –
8 In/Out LL 4-wire Receive/ LL 2-wire Receive/transmit at LL
PSTN backup
–
9 In/Out LL 4-wire Receive/ LL 2-wire Receive/transmit at LL
PSTN backup
–
* Direction relative this unit.