Decentralised and smart monitoring of rotating machines

• Mini display with speed monitoring function for direct mounting on the sensor
• On-site speed display with colour change (red/green)
• Two adjustable limit values, each with its own switching output

Improved performance thanks to IO-Link

• IO-Link enables parameter setting outside the danger zone
• Transmission of the current speed to the controller via IO-Link

Transforms any sensor into a speed monitor
Whether inductive, capacitive or photoelectric sensor: This small device transforms any pulse-generating sensor into a speed monitor. The mini display with speed monitoring function is either screwed directly onto the sensor using an M12 connection or installed in the field. Two adjustable limit values, each with its own switching output, as well as a display with altering red/green indication signal if the current value is above or below the defined speed range. The unit is conveniently set via IO-Link or using the buttons on the device. The speed value can also be transmitted to the controller via the digital communication protocol. This makes the speed monitor plug an inexpensive and flexible solution for decentralised monitoring of conveyor belts, screw conveyors, fans, centrifuges, separators, etc.

Applications
Especially in the field of conveying technology the speed sensors can be used in various applications, for example, to monitor belt conveyors or bucket elevators. Here they are typically used to monitor underspeed, blockage or standstill.

Advantages
The mini display incorporates the complete speed monitoring. The switch points and other parameters can be set directly on the display. In addition, IO-Link provides remote information about the current speed or the switch point and the configuration of important parameters such as the start-up delay time.

Operating principle
The sensor is damped by passing cams or other metallic targets and transmits the pulses to the display. On the basis of the time interval between the damping operations, the evaluation calculates the period duration or the frequency (actual rotational speed value) and compares it to the set switch point (preset value). The output is switched during the start-up delay and when the rotational speed exceeds the set switching value. The mini display signals over- and underspeed and switch-off of the output.