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The 4003 SIGcard is a four-circuit repeater. It supervises each circuit for shorts
and opens, and transfers a common trouble relay. If a circuit is shorted, the
SIGcard does not energize that relay. The SIGcard is controlled and monitored
by the 565-358 Voice Controller Assembly, or by a wired NAC circuit from the
host panel.
The Voice Controller Assembly, 4003 SIGcard, and 75W Amplifier Board
Assembly receive power from the 4003 Power Supply. This power supply can
provide adequate power for the system cards and charge system batteries rated at
up to 18 Ah. Brownout and battery supervision are provide. Trouble conditions
are monitored by the Voice Controller Assembly. Termination’s are provided
for external battery input. However, in this "external battery configuration", the
4003 charger is disabled.
Speaker power is provided by the VCP Amplifier module, a 25V RMS amplifier
with a rating of 75W at 25V only. The "Class A/Music" features associated with
4100 Audio Systems are not available with the VCP.
Additional Descriptions
4003 SIGcard Description
4003 Power Supply
Description
VCP Amplifier Description
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