All-in-one safety gate system for PL e safety and efficiency

08 October 2014

Pilz has launched the PSENsgate 2 safety gate system which combines safety gate monitoring (for prevention of unexpected startup), safe guard locking (to prevent access while hazards are present), various control elements, an emergency stop pushbutton (E-stop) and escape release (for personnel who become trapped in the hazardous area) all-in-one system, up to the highest category PL e as per EN ISO 13849-1 (BS EN ISO 13849-1 in the UK).

The over-dimensioned bolt that forms part of the handle locking mechanism is a hybrid heavy-duty metallic bolt with an associated RFID coded element which communicates with the bi-stable locking shot-bolt in the switch body. In the unlikely event of the bolt breaking it will be detected and safety is assured to PL e. This also offers the highest level of protection against defeat or manipulation, which is becoming an increasingly important topic with the publication of EN ISO 14119.

The bolt can also be padlocked in the open position to prevent closure, relocking and restarting of the machine. This feature enables workers to safely enter the machine with their key knowing that the machine cannot be unexpectedly restarted by somebody else.

The Pilz PSENsgate 2 is available with a range of systems and optional control elements including pushbuttons, key switches, illuminated pushbuttons, section stop, and functions such as emergency stop or escape release. In conjunction with safe control technology, such as the Pilz PNOZmulti configurable control system, it offers a complete, safe and economical system for safety gate monitoring. The two safe outputs of the PSENsgate are OSSDs (cross-checking transistor outputs with test pulses), enabling series connections to be made with many other OSSD-based safety devices such as PSENini (inductive) sensors, PSENcode (RFID coded) guard switches and PSENslock devices (process locks with high-integrity prevention of unexpected startups).

Compared with the original PSENsgate that is being replaced by the PSENsgate 2, the new product is more rugged, consumes less power, is easier to install, and the cover for the emergency release is now hinged instead of being tethered by a short wire. Despite the much-improved specification, the PSENsgate 2 costs no more than its predecessor.

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