Aperta IP67 Emergency Door Release Call Point - Green Surface Mount

The ESP Aperta is an IP67-rated emergency door release call point in a green surface-mount housing, designed to trigger door release mechanisms in fire exit and emergency egress applications. The unit provides both normally open (NO) and normally closed (NC) contact outputs through a double-pole double-throw (DPDT) switch configuration, allowing it to integrate with access control systems, magnetic locks, electric strikes and panic hardware that require either contact state.

Installed on exterior walls, loading bay exits, car park stairwells and other outdoor or weather-exposed locations where emergency exit control is needed, the Aperta's IP67 ingress protection seals out rain, dust and high-pressure washdown. The green housing with white running-man pictogram conforms to standard emergency exit signage conventions, making the call point immediately recognisable in low-light or emergency conditions. Three 20mm knockouts on the rear allow cable entry from multiple angles to suit the site's conduit routing.

The call point measures 101mm wide x 96mm high x 80mm deep and weighs 303g. The surface-mount design fixes to brick, block, metal or timber substrates with four corner fixing points. When the central black button is pressed, the internal DPDT contacts switch state to trigger the connected door release mechanism. The resettable mechanism allows the button to be reset with a key after activation, preventing unauthorised repeated operation.

Product Specification Sheet

Product Manual

What does DPDT mean and why does it matter?

DPDT stands for double-pole double-throw, meaning the call point provides two independent sets of changeover contacts. Each set switches between a normally open (NO) and a normally closed (NC) output when the button is pressed. This allows the Aperta to control two separate circuits or integrate with systems that require a specific contact state to trigger door release.

Can this be used outdoors?

Yes. The IP67 rating protects against dust ingress and temporary immersion in water up to 1m depth for 30 minutes, making the call point suitable for exterior walls, loading bays, car parks and other weather-exposed locations.

How is the button reset after activation?

The Aperta uses a resettable mechanism requiring a key to reset the button after it has been pressed. This prevents repeated unauthorised activation and ensures the call point remains in a known state until authorised personnel reset it.

What cable size do the knockouts accept?

The three knockouts are each 20mm diameter, accepting standard 20mm conduit or gland entries for cable routing. These can be positioned on the rear or sides of the housing depending on site requirements.