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New EM1 expandable safety relay just got smaller

New EM1 expandable safety relay just got smaller

Four years ago, Mechan Controls successfully launched its innovative, modular EM1 safety relay. The goal was to develop an ‘intelligently simple’ safety relay that was expandable and more importantly, non-programmable. After thousands of units sold into a variety of applications/industries, the decision was made to make further improvements and developments to the existing design.

The main objective of the EM1 was to eliminate fault masking, without the need for programming and this was achieved using the ESM extender module. In order to achieve CAT4, SIL3, PL-e, each dual channel safety device must be connected to its own set of safety inputs. However, this method meant the old EM1 required a considerable amount of space compared to a programmable safety relay.

The second thing Mechan Controls addressed was the limitation on the number of ESM extender modules that could be added. The previous version supports a maximum of 12 modules, and this was due to the power limitations, as each extender module draws power from the EM1 master control unit.

The new EM1 is now 1/3 of the size and features a host of new and technological advances over its predecessor. Mechan Controls’ team of experienced hardware and software engineers have used the latest design methods to reduce the size, double the amount of extender modules that can be added and improve the diagnostic features.

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