Appendix C: Calculations - VES Compas Fire Alarm Control Panel Installation Manual

Appendix C: Calculations

APPENDIX C: CALCULATIONS
Current loading of the Compas Fire Alarm Control Panel is limited to the capacity of the power supplies.
Installers must determine the loading placed on these power supplies by adding the sum of device loads to the no
load alarm current of the Compas Fire Alarm Control Panel. The result obtained from this calculation must be
below the operating current of the power supply.
The 5.25 Amp Power Supply operates the fire control panel and external loads with 5.25 Amps and reserves
1.25 Amps for charging the standby batteries.
The 10.25 Amp Power Supply operates the fire control panel and external loads with 10.25 Amps and reserves
2.25 Amps for charging the standby batteries.
Current limits are provided in Specifications for outputs of the Compas Fire Alarm Control Panel. Total device
currents must be below limits provided for all outputs of the fire control panel.
The calculation of total current loading must include the sum of device loads on the circuit outputs of the Compas
Fire Alarm Control Panel. Circuits to be included in this calculation for total current loading are:
SLC Loops
l
NAC Outputs
l
24V OUT
l
AUX 24V
l
Peripheral Interface Modules
l
Network Module
l
Panel Standby and Alarm Currents
l
The current limits provided in Specifications are maximums for individual outputs of the fire control panel. These
output-levels are not intended to be summed together to determine the total current available from the Compas
Fire Alarm Control Panel. Refer to these levels only when determining the limit of device-loading on each output
circuit.
VES Fire Detection Systems
Compas Fire Alarm Control Panel Installation Manual
Version 4.00 | January 2024 | MAN-1431COM
Page 159