Washing machine counter switch
A washing machine counter switch is the name given to technical facilities in communal laundry rooms that enable electricity from their own counter to be used on the shared washing machine in the laundry room of a (mostly multi-family) house. The original devices used keys to identify the user (such as a door lock or mechanically encoded socket wrench). Most of these also had complex wiring. The further development brought miniaturization with it and the identification of the user takes place with modern electronic media. Current devices use chip cards, but there are already devices in which the user is identified by means of RFID cards. These new generation devices have simplified wiring; often only a four-wire bus needs to be wired. For this z. B. U72 cable . This significantly reduces the installation effort.
The way it works is very simple:
- An identification device (in this example the chip card reader) identifies the user
- After successful identification, the command is passed on to the switching device
- This switches on the relevant relay, which releases the electricity from the apartment meter directly to the consumer.
Components of a WZU
WZU with card reader for DIN rail mounting and expansion modules for a total of 48 users
WZU connection scheme
