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Audio Command Center Series Manual — P/N 51889:E1 6/8/2010 49
Output Circuits Installation
ble at the host FACP. Note that CMD1 and CMD2 configurations can be independently set so that
both circuits are triggered by the same type of input or by different types of inputs (see Figure 3.7
on page 49).
CMD3, CMD4 and CMD5 Command Input circuits are triggered by a contact closure only. Each
Command input will activate various messages and amplifiers depending on the Message Control
selection configured by S3 DIP switches 1, 2 and 3 (see Table 2.7 on page 37).
3.6 Output Circuits
3.6.1 Master Command Bus Output
The Master Command Output is a 24 VDC reverse polarity output (TB6) which can be used as an
All-Call trigger for the Audio Command Center Distributed Audio panel. Refer to the ACC-
25/50DA manual, Document #52265 for additional information. The Master Command Output
may activate during emergency or nonemergency paging. See “S3 DIP Switch Settings on ACC-
25/50 Motherboard (ACC-MCB)” on page 37.
When connecting the Master Command Output of the main panel to the Master Command Inputs of
other devices, the wiring must be supervised by a 4.7K EOL resistor connected across the out ter-
minals of Master Command Input #1 on the last panel for Style Y (Class B) installations. For Style
Z (Class A) installations, connect the return wires to the A+ and A- terminals on TB6.
Figure 3.7 Command Input Circuits
Style Z (Class A)
FACP EOL Resistor
(for Style Y - Class B only)
Polarized Strobe
Polarized Strobe
Polarized Strobe
Polarized Strobe
Polarized Strobe
Polarized Strobe
NAC reverse polarity trigger
(alarm polarity shown)
Class B (Style B) Contact Closure trigger input. (4.7K,
1/4 watt EOL Resistors P/N: 27072)
AUDIO•COMMAND•CENTER•25/50 Series Voice Evacuation
Control Panel
a
c
2
5
t
b
5
.
w
m
f
alarm polarities shown
Host FACP
NAC