Second Case - Siemens Cerberus GW-21 Technical Manual

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Siemens Building Technologies
Cerberus Division
9.2

Second case

In this configuration, the LMS system sees the STT as a subsystem and it fully man-
ages it. Two lines are needed to connect the STT to the gateway.
The first line is a slave line for the gateway (and a master line for the STT), has to be
configured as a CS11 subsystem on the gateway (see Section 4 for the proper setting)
but it must be configured as STT subsystem on LMS.
The second line is a master line for the gateway (and a slave line for the STT), has to
be configured as STT subsystem on the gateway (see Section 4 for the proper setting)
and it must not be configured on LMS.
This configuration allows to connect a maximum of two CS11 to the Gateway; both of
them can use the STT.
The address used for the first line (configured as STT on LMS) must be adjacent and
lower than the address used for the second line (that is not configured on LMS). The
two lines must be logically contiguous but not necessarily physically contiguous; i.e. if
there is one LMS that use UARTs 2, the first line can be on UART 1 and the second
line can be on UART 3. In this case they are not physically contiguous but are logically
contiguous (see examples below).
CS11
Fig. 18 STT as a subsystem
GW-21.xx
CS11 STT
E1481b
06.2000