Figure 20: Sigmanet Main Block Diagram - Siemens SIGMASYS C Manual

13 SIGMANET
SIGMANET networks SIGMASYS C and M control and indicating panels and operating pan-
els. Mixed operation of IMT and BMT control and indicating panels is possible in SIGMANET.
SIGMANET is a network for danger alarm systems. It is based on serial connections and
takes the form of a bidirectional ring.
Data is transmitted around the ring as standard in a preferred direction. If the ring is broken at
a particular point, bidirectional transmission is initiated to ensure that all units remain accessi-
ble.
The ring can carry all forms of communication including events and commands.

Figure 20: SIGMANET main block diagram

As from version V3.0 of the control and indicator panels and operating panels, spur line oper-
ating panels can be connected via a free RS232 (V24) interface to the control and indicator
panels in the SIGMANET (1).
If configuring with PLAN D100 V5.2 and control and indicator panel software version 3.0 or
higher, spur line control and indicator panels (2) can be connected to control and indicating
panels in the SIGMANET.
Control and indicating panels and operating panels connected to control and indicating panels
in the SIGMANET via a spur line (2) do not count as network units.
With systems constructed according to EN 54-2 and VdS guidelines, the spur line control and
indicating panel or spur line operating panel must be installed in the same housing or imme-
94 / 128 BMT Project Planning Guidelines
Best.Nr. A24205-A337-B970 – Edition 12 (03/07)