Cranford Controls

IS Push Button Call Point

Product Overview

The IS-CP4A-PB and IS-CP4B-PB push-button manual call points are approved for Zones 0, 1, 2, 21 & 22 requiring intrinsically safe equipment for the control of fire and gas alarm systems. Available with and without monitoring resistors all versions are certified to ATEX and IECEx standards.

The push button mechanism is protected by a spring loaded cover therefore the switch requires a two-action activation. The product is user resettable by rotating the push button. The IS-CP4 range features enclosures manufactured from corrosion proof, marine grade, copper free LM6 (A413) aluminium which is phosphated and powder coated.


IS-CP4A-PB II 1G Ex ia IIC T6 Ga
II 2D Ex t IIIC T60°C Db
IS-CP4B-PB II 1G Ex ia IIC T4 Ga
II 2D Ex t IIIC T70°C Db
Ambient Ta = -40°C to +55°C
Ingress Protection IP66
Housing Material Marine-Grade Copper-Free LM6 Aluminium
Housing Finish Phosphated & Powder Coated Finish – Anti-Corrosion
Colour RAL3000 Red (others available on request)
Cable Entries 2 x M20 clearance top and 1 x M20 clearance side.
Back box can be rotated to give 2 x bottom and 1 x side entries
Stopping Plugs 2 x nylon plugs as standard. Brass and stainless steel plugs optional
Terminals 6 x 4.0mm² cables


Part Numbers

308-052 IS-CP4B-PB Push Button, Red