Sick Sensors > Sick sensors innovative safety sensors that simplify high-integrity series connection

Sick Sensors > Sick sensors innovative safety sensors that simplify high-integrity series connection.

Sick sensors have just released their brand new TR4 Direct safety sensors for doors and gates, Sick appear to have resolved the issue of cost-effective series connection of a maximum of 30 switches, accomplishing PLe, Cat 4 integrity and full diagnostic coverage of installation.

Sick TR4 Direct non-contact sensors for the very first time overcome the restrictions on series connection enforced by the BS EN13849-1 and ISO/DIS14119, that is outlined by the safety specialist Seb Strutt from Sick.

The series connection of conventional mechanical and magnetic switches has become limited via the specifications of the current and impending safety standards due to the requirement to prevent unnoticed errors when electro mechanical switches are connected in series and aren't independently monitored.

In risky applications when PLe as well as PLd interlocking is essential, fault exclusions aren't recommended in relation to mechanical actuators. Series connection of switches must take into consideration about the likelihood of faults staying unnoticed and this ought to be reflected within the stated diagnostic coverage of the functional safety system. These limitations have led to a substantial complexity and expense in supplying effective safety integrity with numerous conventional sensor configurations.

Sicks TR4 Direct safety sensors conquer the issue as well as providing a  simple and value for money series connection. They allow for dependable monitoring of several access installations with complete diagnostic coverage of single faults.

Regarding the innovative Sick TR4 Direct Series, fault finding and troubleshooting has been made even simpler. Each Sick sensor that is in a chain can show a fault, open or closed status as well as the current sensing range of the unit. Each sensor also can show the status of the previous sensor in the chain which permits faster identification of an open switch or fault in the system.

The TR4 direct is simply installed for easy series connection using typical M12 connection cables and M12 ‘T’ connectors, therefore saving both time and expense. Using 24v dc dual channel outputs guarantees the sensors are compatible with numerous popular safety relays and PLC’s. The massive sensing range of 25mm overcomes door alignment and vibration difficulties that might have an effect on other devices, and IP69K environmental protection permits the use of TR4 Direct in sanitary environments as well as other high-humidity applications.

The TR4 Direct is available in several variations, either multicode or even in a distinctive code format where each sensor is paired which a unique actuator which is ‘taught-in’ during commissioning.

For more information on the TR4 Sick sensor range contact us at Electroquip today