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Installation and Operation Manual
PCU
Provide power supply output to the system (AMI, ALU, NOU, ROU, XNU, Addressable Loop Circuits,
Notification Appliance Circuits, Relay output, Network circuits).
Terminals BAT+ and BAT‐ connect two lead‐acid batteries (12VDC) in series.
Maximum Charge Voltage: 27.8 VDC
Maximum Charge Current: 3A. Sufficient battery charging capability is available to charge 40AH sealed
lead‐acid batteries within code requirements for up to 24 hours standby plus 30 minutes alarm.
Use a microprocessor‐controlled transfer circuit to switch power supply for the system to standby batteries
when AC power is off or low.
Communicate to the AMI to report fault conditions.
PCU address is set by the rotary switch on the board. The default is "1".
The PCU must be set to a correct address before use. Please refer to Unit Address
Setting section for detail.
Figure 7 PCU
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