Stand alone safety switch

20 November 2007

Comitronic, a manufacturer and distributor of BTI branded safety equipment, have recently launched the Vigil range of safety switches. These stand alone, non-contact safety switches - equipped with an integrated self-control system - reach the safety category 4 according to the EN 954-1, without connection to a separate safety relay.

The switch is designed with two independent, interactive coded electronic systems. If one is defective, the system will shut down in a fail-safe mode. The internal failure detection is based on self-monitoring closure of one of the contacts of the safety line. The switches consist of two parts - a receiver and a transmitter mounted on a door of a machine. As soon as the door opens, or if the system fails, it is detected and the machine stops until the door closes or until the system failure is rectified. LED indication is also available.

The Vigil uses unique, totally electronic technology ACOTOM 3, based on a multi-decoding system, which, unlike competing reed contact based systems, is completely tamper-proof. The Vigil switches are housed in an easy-to-mount polycarbonate case and equipped with 3, 6 or 12m long cable. It is possible to connect up to 30 Vigil switches in series. There are 2 versions: VIGIL SXR or VIGIL SXRS. VIGIL SXR reaches safety category 3, and VIGIL SXRS reaches safety category 4 without a safety relay. The monitored manual reset is integrated in the VIGIL SXRS version.