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Window Master WSK 321 Break Glass Unit

By: Joseph

Brand: Window Master | Manufacturer Part numbers: WSK 321

Break Glass Unit

Specifications at a glance:

Size: 125 x 125 x 36mm (WxHxD)

Colours Available:

Bracket Options:
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Window Master WSK 321 Break Glass Unit

Break glass unit (primary), plastic housing, with connections for components

  • Primary break glass unit
  • With an audible signal
  • Plastic housing

Smoke ventilation

The product is suitable for smoke ventilation and use natural driving forces for the efficient exhaust of smoke and heat

Primary glass break unit, plastic housing, for manual activation of smoke ventilation system.
The glass break unit is suitable for smoke ventilation panels type WSC 310, WSC 320, WSC 520, WSC 540, WSC 560.

Smoke detector and keypads can be connected directly to the break glass unit – this saves cabling.


Break glass unit with:

  • data communication (break glass unit bus)
  • connection for smoke detector and keypads
  • an audible signal – when opening the door the signal will be interrupted.
  • coloured LEDs for indicating fire triggering or if a fault is present on the system


Spare parts (glass, keys etc.) can be ordered separately.

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Window Master
WindowMaster brand products

Technical Details

WSK 321

Data communication:
Break glass unit bus


Size: between MotorController and remote control:
125 x 125 x 36mm (WxHxD)

Red, orange, yellow, grey or blue

Download PDF's

Window Master WSK 321 instructions

Window Master WSK 321 installation

Window Master WSK 321 Break Glass Unit Data Sheet