Micro Limit switches are a simple but effective solution to stop an axis on a machine from travelling out of limits. They are also used to find a home position, also known as a datum.
They are mechanically operated with terminals: common (C), normally open (NO), and normally closed (NC).
You would typically connect the ground pin on your controller’s limit switch input to the C terminal, and the signal pin to either NO or NC.
Signal to NC in most situations is preferred because if any of the wires are broken, it will be classed as triggered by the controller.
In addition to the micro limit switch, this kit includes the hardware to mount a micro limit switch in a range of orientations to aluminium extrusion with a 6mm slot.
Each kit includes
- 1 x Micro Limit Switch*
- 1 x Micro Limit Switch
- 1 x Micro Limit Switch Mounting Plate
- 2 x M3 8mm Plastite Screws
- 1 x M5 8mm Low Profile Bolt
- 1 x M5 Drop In tee Nut
*The un-soldered terminals version some with bare terminals to attach your own wires. The pre-soldered variant comes with 2500mm silicone wires connected in the normally closed configuration with a Molex connector.
Specification
Un-soldered
| Terminations | Common (C), Normally Open (NO), Normally Closed (NC) |
| Dimensions | 20 x 11 x 6mm |
| Mounting Hole Diameter | 2mm |
| Centre to Centre Mounting Hole Spacing | 9.5mm |
Pre-soldered
| Termination | Common (C) and Normally Closed (NC) |
| Dimensions | 20 x 11 x 6mm |
| Mounting Hole Diameter | 2mm |
| Centre to Centre Mounting Hole Spacing | 9.5mm |
| Wire Length | 2500mm |
| Controller Connector | Molex 22-01-1032 Pin 1 – Ground Pin 2 – Empty Pin 3 – Signal |
Ville K
Ordered 3 sets with pre-soldered terminals. one limit switch arrived broken, it seems visually ok but there is no “click” like other two switches. otherwise that price is good
Tom-Erik
Easy and nice service
paul rothwell
Easy to fit