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Hardwire Zones and Zone Expansion Module
Hardwired Zones: Consist of 8 on-board hardwired zones with a plug-in expansion module
to allow 8 additional hardwired zones. System options allow for all hardwired zones to be
configured as EOL, NC, NO, double balanced, or configured for zone doubling.
Standard Mode: Each zone may be programmed as an EOL (2.2k), normally closed or
normally open. Zones 7 and 8 can be set as fast zones (for normally closed loops only). Refer
to the connection diagram for wiring connections.
Double Balanced Zones: In this configuration, tampers may be detected for both shorted
and opened loops. Tamper conditions will cause an alarm if armed and a fault if disarmed,
with visible tamper indication on the keypad. Up to nine 2.2k resistors are wired in series
across normal shorted detectors, with one 2.2k end-of-line resistor. Any device that opens
adds 2.2k ohms of resistance to the loop causing an alarm. If the loop resistance exceeds
22k, the loop is considered tampered. Double-balanced zones override any individual zone
settings.
Zone Doubling: Up to 32 zones may be used as hardwired if an expander is also used when
this zone option is selected. The zones are consecutive on each physical loop. The low zone
uses a 3.3k resistor and the next zone uses a 7.5k resistor. The loop is wired with normally
shorted devices in parallel. This means that Loop 1 uses the 3.3k resistor for zone 1 and
the 7.5k resistor for zone 2; loop 2 contains zones 3 and 4, etc. In Zone programming (sub
mode 2, Question 90 L3 and 4), program the first odd numbered loop that zone doubling is
to begin, or, to disable zone doubling, enter 00. For example, programming a 15 in the zone
doubling question means that loop 15 on the zone expander will contain zones 15 & 16, and
loop 16 will contain zones 17 & 18. Only odd numbers may be selected because the system
scans 2 consecutive zones at a time.
Cross Zoning: Two groups of 2-zone crosses can be programmed, but the two zones in a
group must be within the same partition. Two cross-zone timers are programmable
(Questions 91 and 92 in Zone Programming) in 15-second increments (15 Sec. to 4 min.)
Cross zone processing only occurs when controlled zones are armed or on 24 hour zones.
Cross zoning works in the following way:
The first zone in a group that trips will load and start the cross-zone timer. There are 3
ways that an alarm may occur from this point:
• The other zone in the same group trips before the timer reaches 0. This causes an alarm
on the second zone to trip. The first zone to trip will only go into alarm if it is still
violated at the time the second zone causes an alarm.
• The zone is crossed to itself ( Zone 1 = Zone 2) and the zone has tripped 3 times within the
timing period (Pulse counter).
• The timer expires and the zone that started the timer is still violated and has not
restored during the entire timing cycle.
Zone Expander Module: Using the OMNIEXP8 Zone Expander Module, up to 8
additional hardwire zones can be used. These zones can be configured as standard (EOL,
NC, NO), double-balanced, or set for zone doubling. Refer to the PC Board and Keypad
Mounting section for information on installing the Zone Expander Module.
4-2
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