2–1
SECTION 2
System Wiring and Hookup
•••••••••••••••••••••••••••••••••••••••••••
In This Section
♦ Wiring the OMNI-408
♦ Terminal Connections
♦ Auxiliary Device Current Draw Worksheet
•••••••••••••••••••••••••••••••••••••••••••
Wiring the OMNI-408
Refer to the Summary of Connections diagram in Appendix F of this guide for visual information
concerning the wiring and hookup of the OMNI-408. The connections shown meet Household
Fire/Burglar Alarm System standards set by UL (UL985 and UL1023).
Terminal Connections
TERMINALS FUNCTION DESCRIPTION
1 & 2 Transformer Connect the 16.5VAC 25VA transformer, utilizing #18awg wire at a
distance not to exceed 15 feet from the panel, to an unswitched 120VAC
outlet.
For US installations, use an ADEMCO No. 1321 transformer or for
Canadian installations, use an ADEMCO No. 1321CN transformer. For all
other installations, use a transformer that complies with the above
specifications. Do not use any other rating transformer, as this may result
in improper operation or damage to the unit.
The AC/LB keypad LED will remain on while AC power is present. If an AC
loss occurs, the AC/LB LED turns off immediately. If AC power remains off
for 15 minutes, the system pulses the keypad buzzer (if enabled in
Programming Question 09, Location 4, Bit 2) and transmits a power-loss
message to the central station, if programmed to do so. THE KEYPAD
BUZZER CAN BE SILENCED by entry of any valid user code. When AC
restores, the AC/LB LED lights immediately, and a Restore code is
reported, if programmed.
3 Earth
Ground
Connect this grounding lug to a cold-water pipe utilizing #18awg wire at a
distance of no greater than 15 ft. Use a non-corrosive metal strap firmly
secured to the pipe to which the lead is electrically connected and secured.
If the premises' pipes terminate in PVC, this terminal must be connected to
a 6-foot grounding rod.
4(+) & 5(-) Bell Output The total output power available for sounding devices is 1A at 11.5 -
13.1VDC. Bell output max. 650mA for UL installations. These terminals
deliver CONSTANT output on BURGLARY, AUDIBLE PANIC, and BELL
TEST. On a FIRE condition, a PULSED or TEMPORAL output can be
generated. There are separate bell cutoff times programmable for burglary
and fire conditions within the pro
rammin
se
uence. For UL Household
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