Analytical Instrumentation & Environmental Monitoring


SIL2 rated safety annunciator

September 2009 Analytical Instrumentation & Environmental Monitoring

Extech has announced the launch of its SIL2 rated SIL725 Safety Annunciator, a product designed and manufactured to provide high safety integrity for critical alarm applications and for use as a component part of a safety instrumented system.

The annunciator is third party certified by SIRA using CASS methodology to safety integrity level 2 to IEC61508. The annunciator has a modular construction which will ensure that whatever the size and complexity of an alarm scheme, the SIL725 can be configured to provide the best solution. Units can be constructed from one to 128 channels, with a choice of two window sizes and six colours. Illumination is by ultra-bright LED. This annunciator uses field proven multiredundant design to ensure there is no single point of system failure. All alarm cards in the SIL725 can act as master controller. Panel or 19” rack mounting units are available, alternatively units can be fully integrated into wall mounting or floor standing enclosures.

Each individual alarm is fully configurable from the front, allowing the user to select many different operating functions and alarm sequences. The SIL725 has common safety related relay outputs which are SIL2 compliant and can be used as part of a safety instrumented system. Each annunciator can have up to two horn relays and two group relays and each alarm channel can be configured to drive any of these common relays. This combination of user flexibility and SIL2 certification is an exclusive feature which will be very valuable to all those involved in instrumentation for the process industry.

For more information contact Gary Friend, Extech Safety Systems, +27 (0)11 791 6000, extech@jhbmail.co.za, www.extech.co.za



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