Maintenance Switch EV-HE077

£81.00 / £97.20 incl. VAT

Tamper-proof switch for testing and monitoring smoke control systems. Each switch comes complete with a plastic enclosure, break glass pane, 3 LED indicators for “OK”, “Fault” and “Alarm” plus an audible buzzer.

Available for Next Working Day Dispatch

Frequently Bought Together

EV-HE077 Firemans Override Switch + ev-301 + Smoke Detector
Price for all three: £537.00

This tamper-proof switch is for testing and monitoring smoke control systems.

Two buttons provide override open, close and reset functions and three coloured LEDs with an audible buzzer indicate system health, fault and alarm status.

The override switch should be located within a secure area for maintenance use only and is wired directly to the interface panel. The hinged door is secured by a common key lock to prevent tampering and has a frangible break-glass element for emergency use.

This maintenance switch is compatible with the following control panels:

  • EV-301
  • EV-601
  • SP200 (ST43148)
  • SP300 (ST43160)
  • SP600 (ST43161)

Under the Construction Products Regulations (CPR) it is a legal requirement to use only certified products for smoke ventilation. It is the responsibility of the installer to ensure installations meet the relevant standards. For more information see SCS Group’s Technical Bulletin.

Dimensions 125 × 125 × 35 mm



UKCA & CE Marked


3 Wire to interface panel


ABS plastic RAL 9010 white

IP Rating



24VDC, 32mA


H:125mm x W:125mm x D:35mm

Product Weight


Control Panels 4 to 5 weeks
Actuators (non-stock items) 2 to 3 weeks
Ventilators 4 to 5 weeks
Louvred Windows 8 to 10 weeks
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