Ziton ZP3, Installation Operation & Maintenance

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ZP3 Fire Control Panel
Power Supply
ZP3 Fire Control Panel Manual
UD1160.3 Iss 6 (25/02/2005)
Page 3 - 13
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3.8 External Power for Accessory Boards
Where the load required for optional accessory boards exceeds the capacity of the ZP3
power supply, it is possible to power these boards from a separate external 24 Volt dc power
supply. This external supply must meet the following criteria.
1. Output voltage must be in the range 22 - 28 Volts dc.
2. Output ripple must be a maximum of 200 Mv (peak-peak).
3. Must comply with the requirements of European Standard EN54-4.
4. Output capacity must be adequate for the required load, even with batteries
disconnected.
5. Incorporate standby batteries, sized to provide the required operating period.
6. The output must be suitably fused.
7. For reporting faults to the ZP3 fire panel, two have voltage-free changeover contacts
must be provided, one signalling a mains failure, the other signalling a battery fault.
Important: Do not connect the 0-volts (negative supply) of the external power supply
and the 0-volts (negative supply) of the fire panel. The 2 power supply
systems must remain floating from each other.
Powering optional accessory boards (sounders and outputs) from a separate external
power supply.