Westermo RV-07B User 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.