Field Wiring; Main Fire Alarm Board Field Wiring; Figure 10: Addressable Loop Wiring - Class B Or Style; Table 3: Loop Wiring Table - Mircom FX-350 Series Installation And Operation Manual

Field Wiring

Main Fire Alarm Board Field Wiring

Wire devices to the addressable loop as shown in Figure 9 for Class B (Style 4) or Figure 10 for Class A (Style 6).
Refer to the Table 3 for loop wire gauges. Wire devices to addressable loops 2 and 3, if available, in the same
manner.

Figure 10: Addressable Loop Wiring - Class B or Style 4

ION SMOKE
DETECTOR
PHOTO SMOKE
DETECTOR
HEAT DETECTOR

Table 3: Loop Wiring Table

UNSHIELDED
TWISTED LOOP TOTAL (OUT AND
PAIR WIRE
GAUGE
AWG FEET
12 20,000
14 15,942
16 9960
18 6265

Loop Isolators

To limit the number of addressable devices compromised by a short on the addressable loop, isolators (MIX-100X,
100XH, or 100XB) may be used to isolate the affect of the short circuit. If the impact of a short circuit must be limited
to only one device, an isolating base must be used for each detector. A maximum of twenty devices can be
connected between isolators, or between the panel and the first isolator, as long as the maximum in-rush current for
the devices on one segment of the loop does not exceed 20mA. Refer to the installation instructions for
addressable devices for additional details.
OUTPUT MODULE
PULL STATION
IN) WIRE RUN
METRES
6098
4859
3036
1910
This Loop Wiring Table is for reference only and should not be
used without a detailed loop calculation.
Maximum Loop Current: 350 mA
Maximum Loop Resistance: 35 subtract 0.2 Ohms per isolator.
Maximum Loop Capacitance: 0.5 uF
Maximum Number of Isolators is 40.
FX-350 Series Installation and Operation Manual
CLASS B
WIRING
25