
3.
SAFET
Y
12 Volt
The COM5 PT1 runs on 16 Volts DC and has an internal 12 Volt battery to supply power in the
case of mains failure. When the mains power is turned off, the unit will still be powered by the
battery. Turn off the battery isolation switch or turn off the mains power before working on any
electronic components.
CAUTION
When removing the battery, take care not to short the positive terminal on the chassis of the
COM5 PT1. Make sure the positive terminal is insulated before installing the battery.
Power Supply
The power supply converts the 230 Volt AC power to 16 Volt DC power. It is located behind the
electronics module and has exposed terminals. Do not place your hand in the gap between the
left-hand side of the electronics module and the cabinet side unless you have isolated the mains
power.