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Top of EB-91A
Bottom of EB-91A
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Class A (NFPA Style D)/Class B (NFPA Style A and B)
Voltage Standby
22VDC nominal, power limited
Current to insure alarm 15mA (1K ohm loop resistance minimum)
Short circuit current 35mA
Supervision current 4.5mA
End-of-line resistor ELR-4.7K, 1/2 Watt (Class B only)
Maximum feed cable
resistance
100 ohms. Feed cable may consist of any combination of
PROTECTOWIRE or copper feed
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- Up to 5,000 ft. of PROTECTOWIRE per circuit.
- Any combination of normally open contact devices.
- Up to (30) Two-Wire Smoke Detectors per circuit.
- Smoke Detectors NS-series #SLR-24, #SIJ-24, #SLR-24H
- Detector Identifier - HD-3 Base Identifier - HB-3
Note: Smoke detectors shall not be employed on intrinsic safe detection circuits.
Power Limited wiring must be isolated from Non-Power Limited Wiring.
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