B501

The NOTIFIER B501 is a standard 4-inch flangeless mounting base for intelligent addressable detectors like FSP-951 and FST-951 in FlashScan and CLIP SLC systems.
It enables secure plug-in detector installation with SEMS screws for 12-24 AWG wiring, tamper-resistant locking, and mounting on 4" square boxes, 3.5" octagons, or 50-70mm centers.
Key Specifications
Feature
Specification
Type
Standard 4" flangeless base ​
Diameter/Height
4.0" (10.2 cm) dia. x 0.74" (1.88 cm) H ​
Voltage
15-32 VDC (SLC loop-powered) ​
Current
~150 µA standby (with detector) ​
Wiring
Screw terminals: 12-24 AWG (+/− SLC, remote LED) ​
Mounting
4" square/plaster ring, octagon boxes