Siemens Cerberus GW-21, Technical Manual, Page: 38 / 44

34
Siemens Building Technologies
Cerberus Division
E1481b
06.2000
12.5 Gateway to subsystem connection
Each connector of the Subsystem Pad is used for one serial ports and to the connector
is linked only one subsystem of any type (Fig. 28 and Fig. 29).
To CSxx modem
terminal block
UARTs 1 and 2
2 - RX
4 - TX
3 - SIGNAL
GROUND
GW-21
Male connector
Fig. 28 GW-21 to CSxx subsystem (UARTs 1 and 2)
To CSxx modem
terminal block
RX 2
TX 4
GND 3
TX 1 1 32 31
RX 4 4 34 33
GND 2 2 36 35
Fig. 29 GW-21 to CSxx subsystem (screw terminal block)