Connection To Gw-20 - Siemens Cerberus GW-21 Technical Manual

Siemens Building Technologies
Cerberus Division
12.4

Connection to GW-20

This type of connection applies only to two level network configurations of the type
shown in Fig. 5 and Fig. 6.
Fig. 26 shows how to connect the GW-21 UARTs numbered 3,4,5 and 6 on the screw
terminal block to the GW-20.
Fig. 26 shows how to connect the GW-21 UARTs 1 and 2 on the two DB9 connectors
of the connection board to the GW-20.
TX 1 1 32 31
RX 4 4 34 33
GND
2 2 36 35
GW-21
Fig. 26 GW-21/GW-20 connection (screw terminal block)
Male connector
UARTs 1 and 2
GW-21
Fig. 27 GW-21/GW-20 connection (DB9 connectors)
All connections should be done using a shielded cable and D connectors with metallic
shells. Fasten the connector to the back plane of the gateway using the screws on the
connector shell.
Male connector
Net-M Pad
Male connector
Net-M Pad
33
E1481b
06.2000