ZP3 Fire Control Panel Installation, Commissioning and Maintenance Manual
REV 11 (ISS 08/03/2010)
Page 101
Remote equipment earth
If any loop device makes use of separate external power i.e. not powered from the ZP loop, then
the earth connections must follow the guidelines below:
The ZP loop shield must be connected to panel earth at the panel.
AC supply earth
and
panel earth must be connected if not the same.
If the loop device is powered from an external power supply at the panel, the external power
supply negative must be connected to panel earth. For a frequent surge environment, the
loop device chassis must be connected to the main building earth. This may require a
separate earth wire to be run to the panel.
System cabling
Overview
The ZP system consists of a number of devices, which are connected together by cables.
Examples of these devices are Control Panels, Repeater Panels, Fire and Smoke Sensors, Audible
Sounders, Relays, Computers, etc. Different circuits control various functions, and these circuits
have differing cable requirements. Four different types of circuit are used to interconnect the
equipment into a system. These are described below, and illustrated on the next page.
A full description of the wiring requirements for each type is detailed on following pages.
Circuit types
Circuit Type
Remarks
Cross Reference
Z-Address Lines
Fire Sensors, Line Relays , Isolators, Call Points,
Addressable Sounders, Other Line Devices
See
Z-Address Lines
on page
103
Serial Communication Lines Panel to panel networks, connections to repeater
panels, and to computers and building
management systems, other devices, e.g.
printers
See
Serial communication lines
on page 109
DC Control Lines
Sounders, Control Relays, Door Magnets, etc.
See
DC Control lines
on page
110
