Main Back Board; Nac Outputs; Regulated Nac Outputs - VES Compas Fire Alarm Control Panel Installation Manual

Appendix A: Specifications

Main Back Board

NAC Outputs
NAC Outputs
NAC 1
NAC 2
NAC 3
NAC 4
NAC 1 and 2 can be configured to provide one Class A circuit (NAC 1&NAC 2) or two Class B circuits (NAC 1
and NAC 2).
NAC 3 and 4 can be configured to provide one Class A circuit (NAC 3&NAC 4) or two Class B circuits (NAC 3
and NAC 4).
Each NAC circuit, whether Class A or Class B, has the following ratings:
AUX Power Output Range
Quiescent Current Consumption
Maximum Current Consumption
Current per NAC Output
Fuse (Electronic)
Supervision
End-of-Line Device
Short Circuit Threshold
Maximum Line Impedance

Regulated NAC Outputs

NAC outputs operate in a regulated mode when conforming to specific levels of continuous or pulsed DC. NAC
outputs meet requirements for regulated levels when the output current does not exceed the constraints
described below.
Regulated Non-Pulsing
Output Current
VES Fire Detection Systems
Compas Fire Alarm Control Panel Installation Manual
Channels configured to power non-NAC devices are rated special application
20V - 26.4V at 2A max, power-limited. Refer to
compatible devices.
30 mA
50 mA (exclude current draw on outputs)
2.5A per channel, power-limited
Average Current Limit: 1 to 2.5A, programmable
Peak Current Limit: 3.0 A, fixed per channel
Reverse-polarity
Diode (S2029)
130 Ohms +/- 20%
4V loss (load-dependent)
Currents cannot exceed 2.5A from any single NAC output:
Combined currents of all four NAC outputs cannot exceed 5A
System must not exceed maximum power supply output rating.
Terminal
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Version 4.00 | January 2024 | MAN-1431COM
NAC Power Output Modes
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