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Relays
2.2.3 Special Application DC Power Output Connection
All Special Application DC power outputs are power-limited (refer to "UL Power-limited Wiring Requirements" on page 28).
2.3 Relays
The FACP provides two programmable Form-C relays and one fixed fail-safe Form-C trouble relay,Note that relay connections may be
power-limited or nonpower-limited, provided that 0.25" spacing is maintained between conductors of power-limited and nonpower-limited
circuits. Refer "UL Power-limited Wiring Requirements" on page 28.
Note that the programmable relay
labeled as Relay 1 is factory default
programmed as Alarm and
programmable Relay 3 is factory default
programmed as Supervisory.
The relay labeled Relay 2 is fixed as a
Trouble relay and cannot be changed. It
is a fail-safe relay which will transfer on
any trouble or total power failure.
2.4 Notification Appliance Circuits
The control panel provides two Class B or four Class A NACs (Notification Appliance Circuits). Each circuit is capable of 2.5 amps of cur-
rent. Total current in alarm for all external devices cannot exceed 6.0 amps (refer to "Calculating the System Current Load" on page 125).
Use UL listed 24 VDC notification appliances only. Circuits are supervised and power-limited. Refer to the Device Compatibility Document
for a listing of compatible notification appliances. The NACs, which are located on the main circuit board, may be expanded via the FCPS
Series field charger/power supplies.
The following sections describe the configuration and wiring of Class B and Class A Notification Appliance Circuits on the ES-50X main
circuit board.
ES-50X Series Manual — P/N LS10129-000FL-E:D 4/26/2021
Power-limited Non-resettable or Resettable Power
1.0 amperes max., 24 VDC nominal filtered, non-
resettable or resettable power is programmable. Aux
Power can be programmed as Class B or Class A.
TB11
Figure 2.5 Special Application Power Outputs - 24 VDC
TB1
RELAY 1
ALRM
NO
NC
C
Figure 2.6 Relay Terminals
Optional Class A
wiring return
PWR1
24V
+ - + -
TB2
TB3
Relay contacts shown with power
RELAY 2
RELAY 3
applied to panel and no active
troubles, alarms or supervisories
TRBL
SUPV
NC
NO
C
NO
NC
C
Installation
25
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