Product category:
Machine Safety Components
News Release from: Euchner (UK) | Subject: SGP Twin and STP Twin
Edited by the Engineeringtalk Editorial
Team on 06 December 2007
Twin-headed switches do double safety
duties
The use of a single safety switch for the control of two guards or doors has obvious cost cutting advantages.
New from safety specialist Euchner are a range of twin-headed switches designed for use with two adjacent machine access or cell enclosure guards Previously, it would have been necessary to use two separate switches for this purpose, involving not only additional material costs, but also extra control circuitry and monitoring facilities
This article was originally published on Engineeringtalk on 14 Dec 2000 at 8.00am (UK)
Related stories
Enabling switches for monitored safety areas
Within its range of safety engineering products, Euchner (UK) can supply manually operated enabling switches for personnel working in danger areas of machines or production area installations
Emergency release variations for safety switches
Three new emergency release variations have been added to the TZ range of safety switches in the Euchner range, designed for machine tool guarding and other safety critical industrial applications.
The new switches are double-headed versions of their well proven STP and SGP safety switches, having an established combination of plastic housings with robust metal actuating heads and internal cams which are suitable for demanding applications involving high locking forces (up to 2500N).
The use of a single safety switch for the control of two guards or doors has obvious cost cutting advantages.
The doors can be hinged or sliding varieties, and typically would be used where a machining cell is located alongside and associated preparation, loading or even palletising enclosure.
Further reading
Category 1 switches get 4 contacts for 2 channels
Selected items in the NZ range of category 1 safety switches from Euchner can now be supplied with 4 contact switch blocks to facilitate 2 channel switching.
Safety switches now with 4 contact switch blocks
Selected items in the NZ range of category 1 safety switches from Euchner can now be supplied with 4 contact switch blocks to facilitate two-channel switching.
Controlled access to either station can be maintained for purposes of safety during production, inspection, cleaning or general maintenance procedures.
Two switches are available including the SGP Twin which is supplied without guard locking.
Manual padlocking is available, however, to ensure the switch actuators cannot be removed from the switch head.
The second switch is the STP Twin which incorporates guard locking, an independently operated electronic shot-bolt mechanism which can be key operated or automatically released when a monitored machine has stopped or is otherwise safe.
The mechanical key release feature can be used as a lockout for the guard locking function to prevent unintentional guard locking.
This ensures that personnel are not trapped within a machining or production cell if a safety door is accidentally closed.
Both switches have the same drilling patterns for fixing and are provided with three cable entry options for maximum mounting flexibility.
Optional LED indication showing the door and solenoid positions is available for the STP Twin switch.
Both products are supplied with various contact combinations (positively driven NC/NO contacts), and it is possible to achieve the highest safety level with a dual-channel wiring system.
With a 1mA minimal switching current, they can also be used with safety control relays and safety PLCs.
The switches also provide an IP67 degree of protection and the straight actuators are suitable for all applications including a door radius up to 300mm.
• Euchner (UK): contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
Search the Pro-Talk network of sites
