Chapter 5: Installation
EST3X Technical Reference Manual 115
battery circuit on the power supply board has the capacity to charge up to two
65 Ah sealed lead acid batteries. The CAB6B can house up to two 17 Ah
batteries. Install batteries larger than 17 Ah in a separate listed enclosure.
Mains power wiring must be double insulated and connected only to a dedicated
120 V or 230 V mains power distribution circuit with its own disconnect device.
Mains input and battery wiring are supervised and nonpower-limited. Route
nonpower-limited wiring on the left side of the cabinet, as shown in Figure 25 on
page 113. Refer to the PS10-4B Power Supply Board Installation Sheet
(P/N 3101774) for connecting power supply field wiring and for specifications.
NAC/AUX power circuits
The PS10-4B provides four 24 V Class B NAC/AUX power circuits. The
NAC/AUX terminal marking indicates signal polarity when the circuit is active.
Polarity reverses when the circuit is not active. For a list of devices you can
connect to special application circuits, refer to the control panel compatibility list
(P/N 3101801-EN).
For notification appliance circuits only, adding an optional CLA-PS10 Class A
Adapter card converts the four Class B NAC/AUX power circuits on the PS10-4B
power supply card to Class A. Refer to the CLA-PS10 Class A Adapter Card
Installation Sheet (P/N 3101776) for connecting field wiring and for specifications.
Class B or Class A NAC/AUX circuits configured as NAC outputs are supervised
and power-limited. Route power-limited wiring on the right side of the cabinet, as
shown in Figure 25. For proper circuit supervision, break the wire run at each
notification appliance and do not loop wires around notification appliance
terminals.
Note: NAC/AUX circuits configured as auxiliary power outputs must be turned on
and off using a startup rule. For example, a rule is needed to turn them off during
an AC power failure if they are powering non-life safety devices and you want to
preserve battery life.
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