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General
The main control panel inputs are set up as standard EOL (4K7) zones which are freely
programmable to whichever type is required. However, by selecting option 'dual' from the
'zones' menu all main control panel zone inputs can be programmed to give ALARM and
TROUBLE indication ON THE SAME ZONE (Fig. 7.).
Wiring
1. The ALARM devices are wired as normal and a 4K7 resistor is fitted in PARALLEL with
the complete loop.
2. The TAMPER switches/devices are wired as normal and a 4K7 resistor is fitted in series
with this loop.
Principles of Dual Operation
All devices closed ....... loop resistance is 4K7
TAMPER device open loop is open circuit
ALARM device open ... loop resistance is 9K4 (ie EOL resistor PLUS parallel resistor)
Example 1
Four wire application for powered motion sensors
Example 2
Multiple sensors wired in a single zone
Figure 7.
Figure 8.
Zone Wiring Options
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