System Power Supply (Sps) - Simplex 4100ES Installation Manual

4100ES Fire Alarm System Installation Guide
22.1.5

System Power Supply (SPS)

The SPS is the power source for the CPU. The SPS provides 24 VDC card power to the CPU motherboard, which is distributed to other bays
up to 2A capacity.
The SPS provides voltage and current information to the CPU card, which can then be displayed at the user interface. The SPS provides an
IDNet channel that supports initiating devices and some notification appliances, such as the 4009-9201/9301 Audio NAC Extender. The
SPS also has three on-board NACs that support reverse polarity or SmartSync supervision.
Auxiliary power, relay, and city circuit/relay module functions are also supported.
The SPS performs standard fire alarm functions, such as brownout detect, battery transfer, battery recharge, earth fault detection, and
power limiting per UL 864.
Figure 89 is an illustration of the SPS.
Figure 89: System Power Supply (566-071)
page 160 574-848 Rev. BQ