Inherently Safe Fiber Optic Estop And U-Beam Sensors

7th October 2014
Posted By : Jacqueline Regnier
Inherently Safe Fiber Optic Estop And U-Beam Sensors

MICRONOR introduces two new inherently safe, fiber optic signaling products for the industrial automation, robotic and medical markets. The MR380 series Fiber Optic Emergency Stop offers ESTOP Functional Safety compliance with SIL1 rating.  The MR382 series Fiber Optic U-Beam Sensor is a general purpose photo interruption/slot sensor.  The products consist of a passive optical Sensor which connects to a DIN rail mount Controller Module via an industry standard OM1 duplex 62.5/125 multimode fiber optic link.  The products can operate over distances up to 2500 meters (8200 feet).

The passive sensors are ATEX rated inherently safe Ex op is allowing direct use in any type of hazardous location or explosive atmosphere; from mines to gaseous to dust environments. The sensors are designed to be use in a wide range of harsh environment applications; including mines, coal bins, oil rigs, petrochemical plants, welding robots, grain elevators, medical and MRI as well as extreme electromagnetic and high voltage environments. The sensors and optical links are completely immune to EMI, RFI, lightning, high voltage discharges and ground loops.

The MR380/MR382 Controller Modules are designed to be installed remote from the sensors in a non-hazardous location typical of other electronic and control equipment. These controllers provide the functional electrical interface to the customer’s system. The MR380 ESTOP Controller provides a conventional ESTOP functional interface including DPDT relay contacts and digital signal outputs for input to a PLC or other system controller. The MR382 U-Beam Controller interface offers a frequency-to-voltage output (for speed monitoring applications) plus digital signal outputs in support of typical applications as a gear tooth speed sensor, edge detector or proximity sensor.

For Functional Safety applications, both controllers default to the emergency state when: (1) the optical path is blocked, (2) in case of a broken fiber, (3) in case of a fiber being disconnected, or (4) loss of power to the controller link.

In small quantities, the unit price for a complete MR380 or MR382 sensor/controller set is $960 or $880, respectively, with typical lead time of stock to 2 weeks.   Discounts are available for OEM applications. Special engineered versions are available for MRI applications, radiation and vacuum environments.


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