13 SIGMANET
diately next to the connected SIGMANET control and indicating panel, since there is no cable
redundancy in a spur connection.
13.1 Features
• Up to 32 units can be networked with SIGMANET. SIGMANET operating panels can be
networked as SIGMANET units if installed a distance away from the control and indicat-
ing panel or as spur operating panels in the control and indicating panel or in the imme-
diate vicinity of the control and indicating panel. Spur operating panels and GMA oper-
ating panels are not considered SIGMANET units. The operating panel integrated in
SIGMASYS C is not considered to be a unit in the ring. SIGMALINK is used for con-
necting SM88 or SDN control and indicating panels is considered to be a unit.
• Cross-control and indicating panel alarm processing and control facilities.
• Local and remote activation of alerting equipment.
• High protection against failure.
• In the case of a fault on the connection between two SIGMANET units (e. g. short circuit
or line interruption), the relevant line segment is clipped. The ring structure guarantees
data transfer between all units is via the remaining connections. The same applies in
the case of a total failure of a unit.
• BMT/IMT mixed operation in SIGMANET.
• Connection of GMA Manager with IMT/BMT mixed operation.
• Connection of devices via the serial V.24 interface in the control and indicating panel.
• Fault diagnostics for the complete SIGMANET system from a central point is possible
as of Version 2.3. The entire system can be programmed from a net unit as of V2.6.
• The units are networked via shielded two-wire lines (IY(St)J 2 x 2 x 0.8).
• The line length between the two units must not exceed 1000 m.
With larger distances a modem link with TTY/V.24 V24230-Z2-A1 converter and modem or
FOC coupler can be installed. Modem links can provoke faults in the system.
Where strong interference has to be allowed for, as is the case in power stations, converter
stations or railway stations, the SIGMANET links should be built as far as possible using fiber
optic cables (FOC). The FOC couplers must be connected in the control and indicating panel
or immediately next to it.
The details of how to plan the layout of the fiber optic cables cannot be gone into here, as it
depends on the type of FOC being used and on the connection module (line lengths and
transmission type).
Experience has shown that some FOC connections on the TTY input cannot be connected di-
rectly to the TTY interface. In that case, connection devices with a V.24 connection and if
necessary a TTY/V.24 V24230-Z2-A1 converter should be used. Some manufacturers (e.g.
EUROLAN, EKS) provide FOC couplers for SIGMASYS which can be connected directly to
our TTY half-duplex interfaces.
In the SIGMANET S24230-F130-A4 operating panel the TTY/V.24 converter required for a
modem or FOC is already integrated.
Note:
Multifunctional Danger Control and Indicating Panels SIGMASYS C and M (M-Modules) 95 / 128
Best.Nr. A24205-A337-B970 – Edition 12 (03/07)
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