Drives of the NEK22M series control buttons with metal bodies are intended for installation in standardised Ø22.5mm holes, in numerous types of control and signal equipment, or directly into
bodies of machines and equipment. They are intended to work with the EF22X and EF22Y switching elements manufactured by SN PROMET, and with the EF22LN backlight block.


Design and installation

Drives of the NEK22M button are comprised of the following elements:
- A driver, also referred to as the button drive;
- An intermediate element, also referred to as the intermediate body. Backlit drives are additionally equipped with a backlight element, which is attached to the intermediate elements.
The body of the drive and the gasket are put inside the assembly hole at the front side of the desk. Then, the clamp nut under the desk is tightened all the way, and the drive element is connected to the ntermediate body.
A drive of the NEK22M type does not constitute a complete drive button. A complete drive button is comprised of the following:
• A drive of the NEK22M button;
• 1-6 switching elements of the EF22 type, ordered separately (max 4 switching elements, when using backlit buttons and knob- or lock-operated buttons switched separately);
• An all-purpose EF22LN backlit block, if backlit buttons are used.
The EF22 switching element
The EF22 switching elements are intended for control buttons of the NEF22 and NEK22M control buttons. The EF22X switching element has one make contact, while EF22Y one break contact. The body of the switching element has two assembly clips (one permanent and one mobile).
The EF22Y switching element meets the requirements concerning effective opening.
The EF22LN backlit block
The EF22LN backlit block is intended for control buttons of the NEF22 and NEK22M control buttons. The body of the backlit block has two assembly clips (one permanent and one mobile)