Introduction
The Rotospeed Switch is designed to economically monitor Rotolok’s Rotary Valves continuously, replacing the need for manual supervision. It can also maintain the overspeed and underspeed of any rotating shaft with a suitable connection.

Specifications

• Supply: 12-240V DC, 24-240V AC
• Switching Capacity: 200mA max
• Saturation Voltage: 6 volts max (output on)
• Ambient Temperature: -15°C to +50°C
• Relative Humidity: 90% RH
• Output State: Normally closed above set speed, normally open with a leakage current of 1.6mA max
• Trip Level: 20% below set speed
• Start-Up Delay: Adjustable from 0 to 60 seconds

Operation
The switch uses a sensing head to detect the blades of a target mounted on the monitored shaft. It activates when the rotor frequency matches or exceeds the set frequency and deactivates when it falls below. It operates over a range of 2.5 to 200 RPM, extendable upon request. Proper installation requires an M12 tapped shaft and an anchor bracket to prevent rotation.

Construction
The unit is housed in a weatherproof cast aluminium casing, suitable for clockwise or anticlockwise operation. It operates from a 12-240V DC or 24-240V AC supply and can be mounted in various positions.

Speed Adjustment
To recalibrate the Rotospeed:

1. Switch off the supply to the machinery and Rotospeed.
2. Undo the three M6 cap head socket screws and remove the rear housing.
3. Place the magnet with the black dot against the 'Cal Mag' text on the sensor and reapply power.
4. Hold the magnet until the machinery reaches the correct speed, then remove it. The sensor will self-calibrate to 20% under the monitored speed.
5. To adjust the start-up delay, reapply the magnet for the desired delay period and remove it.

The output LED will flash at one-second intervals during calibration to indicate the start-up delay.

Mounting Requirements
Ensure proper installation with an anti-rotational bolt and typical anchor bracket. Dimensions and planning details are subject to change, and safety leaflets are available upon request.