MI/B501AP/IV

The Honeywell MI/B501AP/IV is a standard low-profile plug-in base (ivory color) designed for Morley-IAS Advanced (HM Series) addressable detectors, including smoke (HM/PSE), heat (HM/FHSE), and sounder beacons like WSS-PR-N05.
It supports loop wiring continuity, remote LED annunciator output, tamper-resistant locking (via breakable tab), and address labeling for easy identification; compatible with 50-60mm mounting boxes.
Key Specifications
Feature
Details
Compatibility
HM Series detectors, strobes/sounders; Morley Advanced protocol 
Voltage
15-32 VDC loop-powered 
Terminals
Loop +/- In/Out, remote LED (+/-); up to 2.5mm² wire 
Dimensions
Ø102mm, Height 22.5mm 
Weight
39g 
Temperature
-30°C to +60°C ​
Humidity
10-93% RH non-condensing ​
Mounting
Surface/semi-flush; pan-head screws ≤4mm dia. ​