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ABOUT FIRE ZONES
The OmniLT system supports normally open (closed for alarm), two-wire or four-wire smoke detectors. Two-wire smoke
detectors can only be connected to Zone 8. Four-wire smoke detectors can be connected to any zone (1-8). An external 1000-
ohm end-of-line resistor must be used for all fire (and gas) zones. When Zone 8 is used as a Supervised Fire (two-wire or four-
wire) or Gas zone, the Zone 8 Jumper (J9) must be in the "SMK" (smoke) position.
1.
Smoke detectors must be powered from an Output configured as a SWITCHED POWER OUTPUT.
2.
End of line resistor: 1000 ohms. Maximum loop resistance EXCLUDING end of line resistor is a 150 ohms. Use HAI
Model 1503A0011 End of Line Resistor Assembly in UL Listed Installations.
3.
Smoke detectors are reset when the security system is armed.
TWO-WIRE SMOKE DETECTORS
OmniLT supports two-wire smoke detectors connected to Zone 8.
1.
Use normally open (closed for alarm) two-wire "SYSTEM" type smoke detectors (System Sensor 2100TS or equivalent),
rated 8 - 14 VDC.
2.
Smoke detectors must be connected to Zone 8 and configured as a Supervised Fire Zone.
3.
An external 1000-ohm end-of-line resistor must be used.
4.
Connect to the SWITCHED POWER OUTPUT as shown.
5.
The Zone 8 Jumper (J9) must be in the SMK (smoke) position.
4.
Refer to
FIGURE 3 (TWO-WIRE FIRE ZONE CONNECTIONS)
for this configuration.
FOUR-WIRE SMOKE DETECTORS
OmniLT supports four-wire smoke detectors connected to any zone (1-8).
1.
Use normally open (closed for alarm) four-wire "SYSTEM" type smoke detectors (System Sensor 2112/24TR or equivalent),
rated 8 - 14 VDC.
2.
An End of Line Power Supervision Relay Module (System Sensor A77-716B or equivalent) is required for UL installations.
Install 1000-ohm end-of-line resistor as shown.
3.
Power the smoke detector from the SWITCHED POWER OUTPUT as shown.
4.
When connected to Zone 8, the Jumper (J9) must be in the SMK (smoke) position.
5.
Refer to
FIGURE 4 (FOUR-WIRE FIRE ZONE CONNECTIONS)
for this configuration.
