Product category:
Shutdown, SIS and safety systems
News Release from: IDEC Electronics | Subject: ASi Estop
Edited by the Processingtalk Editorial
Team on 20 February 2007
AS-Interface safety at work compatible
Estop
IDEC Electronics have introduced an emergency stop switch which can be connected to the AS-Interface Safety at Work network, containing the standard safety slave functions
IDEC Electronics have introduced an emergency stop switch which can be connected to the AS-Interface Safety at Work network This contains the standard safety slave functions that can be monitored by any ASi Safety at Work Master unit
This article was originally published on Processingtalk on 8 Jul 2008 at 8.00am (UK)
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The ASi Estop employs the XA (16mm hole fixing) and XW (22mm hole fixing) types which have improved safety features over conventional emergency stops.
If the contact block is removed from the operator the main NC contact will be forced to open.
Also, on a conventional emergency stop when at the locked position, because of the internal spring pressure it can tend to move to the normal position if subject to excessive force or shock.
With the XA/XW it works the other way, the energy tends towards the safe off position.
If the contacts happen to be welded, the force applied to the button will always directly open the contact.
The ASi Estops can be supplied in black/yellow control boxes which are the AS-Interface cable piercing type or the M12 connector type.
These units comply with IEC 61508 SIL3 (Functional safety of electrical/electronic programmable electronic safety related systems) and EN954-1 safety category 4 (Safety of machinery - Safety related parts of control systems).
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