Product category:
Safety relays, interlocks, control systems, electrical components
News Release from: Castell Safety International | Subject: Entry Safe switch
Edited by the Manufacturingtalk Editorial
Team on 13 May 2003
Device prevents lock-in accidents and
pranks
A simple, cost-effective device prevents the accidental or malicious closing of machinery access doors while an operator is still inside a dangerous area.
Castell has developed a simple, cost-effective device to prevent the accidental or malicious closing of machinery access doors while an operator is still inside a dangerous area The Entry Safe prevents the start-up of a machine by inhibiting the operation of the tongue switch or similar mechanism
This article was originally published on Manufacturingtalk on 19 Feb 2003 at 8.00am (UK)
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Single key access switch signals alerts
A single-key access safety switch, which is suitable for use on hinged and sliding doors, can be used to switch off a machine via its control circuitry and initialise an alert signal.
Alternatively, it can be used in a more direct way; for instance, to stop a slam door from unintentionally shutting behind personnel entering a cold storage room or similar potentially-hazardous space.
The Entry Safe is easily retrofitted to existing door frames and is compatible with both hinged and sliding doors.
Aside from tongue switches, it can be used in conjunction with hinge, magnet, coded or reed switches, and even non-contact switches.
Under normal working conditions, the access door is closed, the tongue switch engaged and the machine running normally.
When access is required, the operator opens the door, thereby breaking the switch's contacts and stopping the machine.
Before gaining access, the operator turns the key in the Entry Safe, which causes a lever to extend towards the door's hinges and thus prevent the door from closing.
The operator then removes the key and retains it for the whole of the period spent inside the dangerous area.
Only when the key is re-inserted into the Entry Safe can the lever be retracted, the door closed, the switch re-engaged and the machine re-started.
The Entry Safe is available in multiple-key options, enabling teams of mechanical, electrical and CNC engineers to carry out safe and simultaneous machine maintenance.
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