When the need for safety focuses on who can have access to equipment, one option is the family of sensorPRO contactless safety switches. These switches come with a range of RFID-coded sensors that provide flexible protection against unauthorized access or manipulation for machine operators and equipment. The RFID-enabled STS series safety switches are available in three coding options: unique, which exclusively accepts input signals from its factory-paired actuator; fully-coded, which can be programmed to accept input from a specific STS actuator; and coded, which can accept input from any STS actuator.
The safety switches are reliable, contactless devices that can be used as stand-alone safety switches or wired in series in sets of up to 30 sensors, while maintaining PLe/Category 4 safety ratings. They can actuate in five operator-definable directions of approach with actuating distances of 8 mm, providing machine design engineers with the flexibility to use the switches even when the device that requires monitoring has large mechanical tolerances, or is removable, rotatable or moves sideways. The switches are also rated for IP69K protection for use in harsh environmental conditions, including high-pressure and high-temperature washdown applications.
“The various coding options allow machine design engineers to achieve enhanced safety, tamper resistance, and compliance with the ISO 14119 coding level requirements,” said Martin Lalonde, application engineer at Wieland Electric. “They can be monitored with conventional safety controllers or own their own, thanks to their integrated, stand-alone control logic with an integrated reset/EDM input and sizeable 400 mA short-circuit-proof OSSD outputs.”
Available in two flush-mountable housing sizes—STS 01xx (36 × 26 × 13 mm) and STS 02xx (88 × 25 × 13 mm)—with standard M12 connectors or pre-wired cables, STS series safety switches are rated for 24 Vdc input voltage, and feature two OSSD (output signal switching device) output circuits rated for 400 mA, and a 50 mA diagnostic circuit. Each device also features two safety input circuits, and can be configured for external device monitoring (EDM) input for both manual and automatic start. A three-color LED display provides extensive visual diagnostic capabilities. The switches are rated for operation between −25 and 70° C (60° C for UL), and carry cULus and TÜV approvals.