Appendix F: Wire Requirements - Honeywell Fire-Lite Alarms MRP-2001 Instruction Manual

Appendix F: Wire Requirements

Connecting external system accessories to the main circuits must be carefully considered to ensure
proper operation. It is important to use the correct type of wire, gauge and run length for each
circuit. Reference the chart below to specify wire requirements and limitations for each circuit.
CIRCUIT CONNECTIONS
Circuit Type Circuit Function
Initiating Device Connects to
Circuit Initiating Devices
(power-limited)
ANN-BUS (EIA- Communication for
485) ANN-BUS
power-limited annunciator and
relay modules
ANN-BUS Power for
Power ANN-BUS
annunciators
24 VDC Power for
Regulated, accessories and
resettable, 4-wire devices
nonresettable
Auxiliary Trouble Open Collector
Input trouble input for
CHG-75,
CHG-120F, etc.
NAC/Solenoid Connects to NAC
Outputs devices or Release
devices
MRP-2001 Series Manual — P/N 53040:H 1/26/2017
Wire Type and Limitations
Untwisted, unshielded wire or
twisted pair, unshielded wire
(maximum loop resistance not
to exceed 100 ohms)
Twisted pair a maximum loop
resistance of 120 ohms
Refer to "ANN-BUS Devices" on page 33 for information on device wiring
Untwisted, unshielded wire or
twisted pair, unshielded wire
Single conductor
Untwisted, unshielded pair
wire or twisted, unshielded
pair wire
Table F.1 FACP Wire Specifications
WIRE REQUIREMENTS
Recommended
Max. Distance
Feet (meters)
Distance limitation 12-18 AWG (3.25 - 0.75 mm
set by 100 ohm
resistance limitation
6,000 (1,800 m) 12-18 AWG (3.25 - 0.75 mm
Distance limitation
12-18 AWG (3.25 - 0.75 mm
set by 4 volt
maximum line drop
Distance limitation 18 AWG (0.75 mm
20 feet in same
room
Refer to Section F.1 on page 122.
Wire Gauge
2
)
2
)
2
)
2
)
121