PS031W

The Honeywell PS031W (also used across Notifier, KAC, Gent by Honeywell brands) is a red plastic surface mounting backbox/back box designed specifically for manual call points (MCPs) like the HM/MCP/GLASS, enabling secure surface installation without flush boxes.
It provides cable entry points, terminal access for loop wiring, and increases overall depth for proper MCP fit, maintaining IP24D rating when assembled.
Key Specifications
Feature
Details
Dimensions
87-93mm W x 93mm H x 32mm D 
Weight
80g 
Material
Durable ABS/PC plastic, red (RAL 3001) 
Compatibility
HM/MCP/GLASS, KAC/Notifier MCPs; up to 2.5mm² wire 
Mounting
Direct wall surface; pairs with semi-flush MCP (total depth ~59.5mm) 
IP Rating
IP24D (assembled with MCP) ​