AH500935U001 Analog Tach Calibration Option Board DC590

This AH500935U001 board continues to support both AC and DC analog tachs with a calibration range of 10 to 200V

 • For AC tach feedback, use terminals G1 & G2, with selector switch in the AC position (left). Calibrate the switches for √2 x full-speed voltage required, i.e. √2 x 90V = 127V. This adjusts the r.m.s. value received from an AC tach into the required peak value.

 • For DC tach feedback, use terminals G3 & G4, with selector switch in the DC position (right).