Document #50580 Rev. C 8/12/97 P/N 50580:C
23
Auxiliary DC Power Output Connections
3.4
Auxiliary DC Power Output Connections
The Auxiliary DC power output is power-limited.
3.5
Input Circuits
The VECP has two Command Input circuits (CMD1 and CMD2), which are used to activate the panel amplifiers
which, in turn, transmit an audio signal over the system speakers. All field wiring for each circuit is power-limited
and supervised for opens and ground faults.
Each CMD Command Input circuit can be independently field programmed to be triggered by a contact closure or by
the reverse polarity of a Notification Appliance Circuit. CMD input and output terminals are provided to allow place-
ment of the VECP anywhere along a Notification Appliance Circuit allowing nondedicated use of host FACP NAC
for triggering. CMD1 has relay contacts (maximum current 2.0 amps) before the out terminals which will open the
outgoing NAC circuit during a VECP trouble condition. This causes an NAC trouble at the host FACP.
Note that the Command Input Circuit configurations can be independently set so that both circuits are triggered by
the same type of input or by different types of inputs (Refer to Figure 3-7 on page 23).
Special Application Power (35 mA @ 24 VDC) is nonresettable
power suitable for powering control modules and End-of Line
Power supervision relays. See Appendix D for compatible devices.
FIGURE 3-6:
Auxiliary Power Connection
FIGURE 3-7:
Command Input Circuits
4.7K, 1/4 watt EOL Resistor
P/N: 27072
Style Z (Class A)
Alarm contact,
pull station, etc.
FACP EOL Resistor (Style Y -
Class B only)
Polarized Strobe
Polarized Strobe
Polarized Strobe
Polarized Strobe
Polarized Strobe
Polarized Strobe
NAC reverse polarity trigger
(alarm polarity shown)
Contact Closure trigger
FIRE•COMMAND•25/50 Voice
Evacuation Control Panel
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