The CTP-BI from Euchner is based on the proven principle of the CTP safety switch and has an additional bi-stable locking function. As the company explains the principle, in normal operation the guard locking is controlled via an input signal. When the operating voltage is switched off, the guard locking is maintained in its current position. This means that the safeguarded door remains either locked or unlocked, regardless of the locking principle, until power is reapplied. The bi-stable guard locking solenoid therefore provides an additional measure of protection to prevent an individual becoming accidentally locked inside a guard locked door, whether for service, maintenance or cleaning purposes. The bi-stable function of the solenoid also prevents the deactivation of guard locking if there is a power failure. Moreover, it is not possible to enter the danger area immediately if there are any over-traveling machine movements.
Safety switch with bi-stable locking function
The bi-stable safety switch CTB-BI prevents any inadvertent locking in of personnel in case of a power failure and an open safety guard.
20 Jun. 2017
More on the topic