Template:Infobox bms


This safety switch is used for safety gates as alternative product to the Euchner switches.


1 Electrical Connection[edit | edit source]

File:SchmersalAZM150SK Connection.png

2 Locking and Release functions[edit | edit source]

The switch is electrically open if 24VDC are supplied to A1/A2.

Use a triangular key to release the locking mechanism and override the electrical lock.

File:SchmersalAZM150SK LockingFront.png
File:SchmersalAZM150SK TriangKey.png

On the backside there is an additional triangular knob which also overrides the front release knob.

File:SchmersalAZM150SK LockingBackside.png

So if the switch is electrically locked and mechanically locked on the frontside, but still can be opened, you need to check the backside.


3 Function of Contacts[edit | edit source]

  • If the switch is mechanically and electrically locked all contacts 11/12, 21/22, 31/32, 41/42 are closed.
  • If the switch is electrically and/or mechanically unlocked, but the latch is still closed, the contacts 11/12 and 21/22 are open, while 31/32 and 41/42 are still closed.
  • If the latch is not inserted (== Gate is open) all contacts are open.


-->To have the same operation then before with the Euchner-Safety Gate we have to use the contacts 31/32 & 41/42. We just want to know if the gate is closed, if it is locked or not we don't care.