Auxiliary DC Power Output Connections
2.4 Auxiliary DC Power Output Connections
The Special Application Auxiliary DC power output is power-limited (Class 2).
Special Application Power (500 mA @ 24 VDC) is nonresettable power suitable
for powering control modules and End-of Line Power supervision relays.
2.5 Input/Initiating Circuits
2.5.1 CMD Inputs
The ECC-50/100 has eight Command Input circuits, which are used to activate the panel amplifiers
which, in turn, transmit an audio signal over the system speakers. All field wiring for the circuits is
power-limited (Class 2) and supervised for opens and ground faults. Note that zero impedance to
ground will cause a ground fault.
CMD1 and CMD2 Command Input circuits can be independently field programmed to be triggered
by a contact closure or by the reverse polarity of a Notification Appliance Circuit.
IMPORTANT! When CMD1 and CMD2 are configured for reverse polarity, the NAC cannot be
Coded (including NAC Sync).
CMD1 has internal relay contacts before the out terminals which will open the outgoing NAC cir-
cuit during an ECC-50/100 trouble condition (AC loss is programmable as described in Section 3).
This causes a NAC trouble 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 2.9 below).
Style Z (Class A)
(for Style Y - Class B only)
NAC reverse polarity trigger
(alarm polarity shown)
Emergency Command Center Manual — P/N LS10001-000FL-E:G 5/3/2016
See Device Compatibility Document for compatible devices.
Figure 2.8 Auxiliary Power Connection
alarm polarities shown
ECC-50/100 Main Control Board
Figure 2.9 Command Input Circuits
Class B (Style B) Contact Closure trigger input, such as
an emergency signaling manual pull station (MNS only).
(4.7K, 1/2 watt EOL Resistors P/N: 71252)