Catalogue (1.8 MB)

Related Products

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Enabling Switch ZB1


Enabling Switch ZB2


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Enabling Switches Accept-A ZA3

  • 3-stage switches (Off-On-Off)
  • Panel mounted switch for different built-in sizes
  • Redundant contacts to fulfil safety category 4
Technical Caracteristics
Protection DegreeIP65(with rubber cap)
Operating Temperature -25°C to +60°C
Mechanical Lifetime

1 Mio. activations


The B-COMMAND enabling switch ZA3 is a three-stage (OFF-ON-OFF) enabling switch which is ideal for installation on input devices. The enabling switch ZA3 has an mounting diameter of Ø16mm. It is mounted by a lock nut, which is also used to secure anti-rotation protection.

The two working contacts are change-over contacts, which offer the customer several wiring options. The redundant contact configuration meets safety category 4.

For optimum operating comfort, the actuation force from position 2 to 3 for centric and eccentric pressure is absolutely identical: Even switching with only one finger at the outer limit of the switch is reliably possible.

The B-COMMAND enabling switches ZA3 are available with or without rubber caps. In addition to the standard rubber cap color yellow, the enabling switch ZA3 is also available with grey or black rubber cap. To enable the use of B-COMMAND enabling switches in the automotive industry, our enabling switches are also available in silicone-free material.


If you have any questions regarding our enabling switches we are available for you by phone, e-mail or live-chat.

3-Stage Operation Enabling Switches (IEC 60947-5-8)

The function of our enabling switches is 3-stage or based on 3 positions. The working contacts are actuated in the middle position. For this purpose, we have implemented a clearly noticeable pressure point on the design side. In the event of panic / injury, the operator would either press firmly (3rd stage) or release the handle (1st stage). Both times the working contacts would be deactivated and the system would be stopped. The 2nd stage must therefore be actively operated and held. It is mainly used for setting up or maintaining machines or robots within hazardous areas.