BSS-DR-N05

The Honeywell Morley-IAS BSS-DR-N05 is an integrated detector base sounder/strobe that serves as an advanced alternative to the MI/B501AP/IV standard base, combining mounting base functionality with loop-powered audible/visual notification (EN54-23 compliant strobe).
It uses the System Sensor B501AP base design for seamless compatibility with HM Series detectors (e.g., HM/PSE, HM/FHSE), adding powerful sounder output, intense strobe, and tone/volume selection for enhanced fire alerting without extra wiring.
Key Comparison to MI/B501AP/IV
Feature
MI/B501AP/IV (Standard Base)
BSS-DR-N05 (Integrated Sounder/Strobe)
Function
Detector mounting + remote LED support 
Detector mounting + sounder/strobe notification 
Power
Loop-powered base only (15-32VDC) ​
Loop-powered with alarm current up to ~7mA ​
Notification
None (relies on separate devices) ​
High-output sounder + EN54-23 strobe 
Mounting
Ø102mm low-profile, 50-60mm boxes ​
Same B501AP-compatible base dimensions ​
Use Case
Basic detector installation ​
All-in-one base for areas needing integrated AV ​