Ampac ZoneSense Plus - Electrical System and Power Supply

MAN 2326-13
11
4 Electrical
4.1 Primary Power Supply
The Power Supply is;
➢ A switch-mode design and operates from a mains supply of: 90VAC - 264VAC @ 47Hz - 63Hz;
➢ Capable of supplying the system while all zones are in alarm; and
4.1.1 Mains wiring
The requirement for the Mains supply to the FACP is xed wiring, using three core cable (no less than
0.75mm and no more than 2.5mm ) or a suitable three conductor system, fed from an isolang
switch fuse spur, fused at 3A. This should be secured from unauthorised operaon and be marked
'FIRE ALARM: DO NOT SWITCH OFF. The Mains supply must be exclusive to the FACP.
4.1.2 Connecting the Panel
Connecng ZoneSense PLUS internal connecons and PCBs is best undertaken immediately prior to
Commissioning.
Before beginning ensure all devices on the circuits are correctly connected and that cable integrity is
veried throughout the installaon
 Important: DO NOT use an insulaon tester ('Megger') with any electronic devices connected.
Faults occurring in the wiring which are not picked up at this stage will almost certainly result in
spurious and intermient faults when the equipment is energised.
4.1.3 Installing the Power Supply PCB
ZoneSense PLUS Power Supply PCB combines the funcons of a Mains to DC switched mode power
supply unit, baery charging unit and baery monitoring unit.
 Important: Under no circumstances should the ZoneSense PLUS panel be operated without
the Power Supply PCB correctly mounted in the enclosure and the retaining screws securely ghtened.
4.1.4 Connecting the Mains
The technician should NOT aempt to connect Mains to the Panel unl fully conversant with the
layout and features of the Power Supply PCB.
The incoming Mains cable should be brought into the Panel at the top right hand side of the enclosure
and correctly terminated on the Chassis Earth Terminal and then to the Power Supply connector
block.
Note: Fuse F1 (2Amp Supply 1.25 Amp / 250VAC M205) (3 Amp Supply 2Amp /
250VAC M205) is eld replaceable
Before switching on the Power Supply the Earth MUST be connected to the chassis earth terminal.
1. All earth cabling must be terminated to the Panel Chassis Earth Terminal in a Star
conguraon.