90
Table 11. Meter readings
Class B (spur) Detector Circuit
From zone + to zone – (each zone).
Class B (spur) Notification Appliance Circuit (each signal circuit)
Resistance across circuit:
⋅ In one direction.
⋅ In the opposite direction.
10kΩ (EOLR).
Class A (loop) Notification Appliance Circuit (each signal circuit)
Resistance across circuit:
In one direction.
Open circuit.
From MX/IDNet/MAPNET + to ground.
From MX/IDNet/MAPNET - to ground.
Measuring from MAPNET/IDNet B+ to A+, or B- to A- reads as an open circuit due to the
channel isolators in the loop.
From MX+ one end to MX+ other end of the loop.
From MX- one end to MX- other end of the loop.
Open circuit, loop isolators are
open.
From MX+ to MX- one end of the loop.
From MX+ to MX- other end of the loop.