Mechan Controls is promoting its HED safety switch that monitors two adjacent doors with a single switch and a coded magnetic actuator on each door. This saves on installation time, cabling, parts count and purchase costs - one HED switch costs around half the price of two separate switches. The non-contact actuators can approach the switch from most angles, with the switching distance being 7mm. Safety-related specifications are PL e, Category 4 and SIL 3.
Each HED switch has two normally-open safety contacts. When either door (or gate, guard or cover) is opened, a normally-open contact is opened and the corresponding normally-closed auxiliary contact is closed. Both doors must be closed to enable the two N/O contacts to close and the N/C indication contact to close. LED status indicators on the switch body aid fault diagnosis. There is a choice of three cable entry points: left, right or centre.
Plastic or stainless housings
HED switches feature agent-resistant plastic or 316 stainless steel enclosures encapsulated with epoxy resin for a protection level of IP67 and IP69K. The solid-state design makes the HED tolerant of shock and vibration.
Mechan's HE-Series safety switches have been fully tested and approved by TUV and cULus. If you are looking for a reliable, cost-effective way top safeguard two doors, follow the link to find out more about Mechan's HED safety switch. Alternatively, telephone +44 (0)1695 722264 (please mention MachineBuilding.net). You can also follow Mechan on its official Linkedin company page.