ADEPT 10338-00180 Communication module

To sense turbine speed, the control accepts a signal from a passive magnetic pickup unit (MPU) mounted off a gear connected or coupled to the turbine’s rotor. Connect the MPU speed sensor to terminals 25, 26, and 27(shield). This input is limited to a frequency range of 100–24 950 Hz, (90–20 000 rpm) and a voltage range of 1.7–35 Vac (it needs the voltage above 2.7 Vac in case of a signal above 13 000 Hz). Verify that the input’s shield wire has continuity its entire distance to the input sensor and is insulated from all other conducting surfaces.

MPU Speed Sensor Input

With proper MPU, gear size and MPU-to-gear clearance, speed measurement should be capable down to 100 Hz. Check the speed sensor for visible damage. Standard MPU clearance is recommended to be between 0.25 and 1.0 mm (0.010 and 0.040 inch) at the closest point. Make sure the gear has less than 0.5 mm (0.020 inch) diametric run out. See manual 82510, Magnetic Pickups and Proximity Switches for Electronic Governors.

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