Electrical Installation 2 - 41 Selecting the Number of PG (Encoder) PulsesThe setting for the number of PG pulses depends on the model of PG Speed Control Board being used. Set the correct numberfor your model. PG-A2/PG-B2The maximum response frequency is 32,767Hz.Use a PG that outputs a maximum frequency of approximately 20kHz for the rotational speed of the motor.Some examples of PG output frequency (number of pulses) for the maximum frequency output are shown in Table 2.24.A separate power supply is required if the PG power supply capacity is greater than 200mA. (If momentary power loss mustbe handled, use a backup capacitor or other method). See Fig 2.24.Fig 2.24 PG-B2 Connection Example For External +12Vdc PG Power SupplyTable 2.24 PG Pulse Selection ExamplesMotor's Maximum Speed (RPM) PG Rating (PPR) PG Output Frequency (Hz)1800 600 18,0001500 800 20,0001200 1000 20,000900 1200 18,000Motor speed at maximum frequency output (RPM)60 × PG rating (PPR)fPG (Hz) =123456TA1TA3+12Vdc0Vdc++__0Vdc++__0Vdc +12Vdc+_PG power supplyPGSignalsPG Capacitor formomentary power lossAC
