Weidmuller SIL 3 safety relay

Weidmuller has released its SIL 3 Safety Relay. Designed for use in the emergency shutdown of plants and plant components in the process industry, the safety relay is claimed to increase plant availability and safety.

The device meets the requirements of EN61508 as well as the safety demands of Safety Integrity Level 3.

Weidmuller claims the safety relay guarantees safe electrical isolation of the safety PLC to the field and initiates protective measures in the face of danger or immediately cuts the energy supply.

The SIL 3’s safety and monitoring circuits each have a yellow LED to indicate functioning. In the output of the safety circuit - the SIL circuit - there is a redundant connection of three relays to guarantee reliable isolation within the output circuit.

The safety relay is fitted with gold-plated contacts. An additional switching current range of 6 mA up to 5 A of the monitoring circuit permanently guarantees reliable reaction of the emergency shutdown system. In addition, the time span between Relay ON and Response is 4.5 ms (230 V AC) and 5.7 ms (120 V AC) respectively.

The safety relay has a widespread rated operational voltage of 120/230 V AC at the input of the monitoring circuit. A temperature range of -25 to 50°C makes it suitable for use in numerous environments, including harsh surrounds.

The compact safety relay measures 92.4 x 22.5 x 112.4 mm. The SIL 3 Safety Relay requires little space in a control cabinet and can be easily mounted on a TS35 DIN rail.