Ziton ZP3, Руководство по установке и обслуживанию

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Chapter 3: Field wiring
60 ZP3 Fire Control Panel Installation, Commissioning, and Maintenance Manual
Alternative screen connection
For optimum connection, if
thick, mineral-insulated cabling
is being used, we recommend
using EMC glands as an
alternative method for the
screen connection.
Strip away the outer covering
of the cable to expose the
metal sheath. Connect the
metal sheath directly to the
ZP3 panel box via the EMC
conductive gland.
SCREEN SCREEN
EMC gland
Outer cover
EMC gland
connecting
metal sheath
and panel box
Cable sizing depends upon the length of the Z-loop, and the number and type of
devices connected. Input devices, such as fire sensors, call points, and interface
units, use very little current, and allow the maximum loop length. Adding loop-
powered output devices (for example, sounders) to the loop requires heavier
cable and reduces the allowable loop length. See Appendix A “ZP wiring guide”
on page 117 for more details.
See Figure 44 on page 61. The ZP3 Fire Control Panel has four built-in sounder
outputs, arranged in two pairs. These outputs provide 24 VDC for driving
sounders. They can be programmed to activate on a fire alarm from any zone or
device, or as required.
The outputs are wired in two-wire Class B single direction format. They must be
daisy-chained from point-to-point, without T-taps or spurs. They operate on a
reverse polarity basis, and are monitored for open circuit and short circuit faults.
Circuits must be terminated with a 2.2 k
ȍ
, 1 W end-of-line resistor at the last
sounder on the circuit.