Interface rs-232, Line interface, Power connection dc – Westermo TD-29 User Manual
Page 8
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8
6611-2002
Interface RS-232
9-pos. D-sub
Pin. no.
9-pos.
Screw terminal
Direction
Description
5
4
3
2
1
9
8
7
6
5
6
7
8
9
4
3
2
1
1
–
–
–
2
4
Out
RD/Received Data
3
3
In
TD/Transmitted
Data
4
–
–
–
5
5
–
SG/Signal Ground
6
–
Out
DSR/Data Set Ready
7
2
In
RTS/Request to Send
8
1
Out
CTS/Clear to Send
9
–
–
–
Interface RS-422/485
9-pos.
Screw
terminal
Direction
ITU-T V.11
Description
Description
5
6
7
8
9
4
3
2
1
9
In
A' (R+)
RS-422 Receiver
8
Out
B' (R–)
RS-422 Receiver
7
In/Out
A (T+)
RS-422/485
Transmitter/Receiver
6
In/Out
B (T–)
RS-422/485
Transmitter/Receiver
The definition of R+/R–, T+T– can vary between different manufacturers.
Line interface
2-pos.
screw terminal
Direction
Description
1
2
1
In/Out
Transmitter/Receiver
2
In/Out
(2-wire)
Power connection DC
Screw no.
Description
Power supply
1
2
1
–
0 V DC
2
+
12–36 VDC
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