Issue 03.2016
10/12
DSU BOX – user manual
5
Pin assignment of DSU
DSU BOX provides two 9-pole D-Sub connectors, a TTY input and
RS422 output. TTY output connector is reservered and not used.
RS422 output connector and connection status LED are located at
front side of DSU.
Power supple cable feed-through (12V/200mA) and TTY input con-
nector are located on back side of DSU.
Pinning „TTY input“, 9-pole D-Sub, male connector:
Pin Port
1
2
3
+RX
4
–RX
5
6
GND
7
+12V
8
9
Pinning „RS422 output“, 9-pole D-Sub, female connector:
Pinning „TTY output“, 9-pole D-Sub, female connector:
Reserved, not used
Pin Port
1
RS422 TX+
2
3
RS422 TX–
4
5
6
7
8
9
