Weidmuller SIL 3 Safety Relay

Electrical connectivity supplier Weidmuller has released its SIL 3 Safety Relay. Created specifically for use in the emergency shutdown of plants and plant components in the process industry, the device increases plant availability and safety. It ensures 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 device’s safety and monitoring circuits each have a yellow LED to indicate the functioning of the relay and ensure faultless operation. In the output of the safety 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 and 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 only 4.5 ms (230 VAC) and 5.7 ms (120 VAC) respectively.

For added flexibility and user convenience, the product offers a widespread rated operational voltage of 120/230 VAC at the input of the monitoring circuit. A wide temperature range of -25 up to +50°C makes it suitable for use in numerous environments including harsh surrounds.

Highly compact, the product is only 92.4 x 22.5 x 112.4 mm. It requires little space in a control cabinet and can be easily mounted on a TS35 DIN rail. The device meets the requirements of EN61508 as well as the safety demands of Safety Integrity Level 3.