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RCS20 M:N Redundancy Switch
Theory of Operation
3.2.2 Front Panel
Front panel controls and indicators provide for auto/manual configuration, as well as display of
online/off line status information for all modems in the Redundancy configuration. See Section
4.1
3.2.3 Controller Interface Module
The controller interface module (CPU TERR I/O) provides ports for external monitoring and
control. See Section 5.2.3.2.
3.2.4 Clock Distribution Module (Optional)
Consult factory for availability. See Section 5.2.3.1.
3.2.5 Redundant Power Supplies
The M:N Switch comes equipped with two fully redundant internal power supplies (PS1 and PS2)
that supply DC voltage to the system. Each supply is fully independent of the other, including
their source of AC power and fusing.
The Switch can remain fully operational as long as it is supplied with a source of voltage from
either power supply. Only if the voltage output failed on both supplies would the Switch become
inoperative. PS1 and PS2 are located one on either side of the RCS20.
3.2.6 Ethernet Module (Optional)
Consult factory for availability.
3.2.7 Bank Control Module
The Bank Control Module provides connection to auxiliary equipment. See Section 5.2.3.3.
3.2.8 RCU20 Back Panel
Tthe RCS20 contains the plug-in slots for the Interface Control Module, the Clock Distribution
Modules, Bank Control Modules and Ethernet modules. Also contained in the back panel are the
two AC fuses and power receptacles.
3.3
IFS20 Major Assemblies
The IFS20 IF Switch interfaces the IF signals of the Modems with the earth station IF system and
provides backup switching. The unit provides all of the switching relays, signal combiners and
splitters, terminations and interconnecting cables that are necessary to connect any combination
of up to eight Modulators and Demodulators to eight independent uplink and eight independent
downlink transponders.
3–2
Rev. 14
MN-RCS20
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