Yaskawa PG-W2 - Manual (Page 5)

Yaskawa Electric America, Inc. – www.drives.com
IG.AFD.61, Page 5 of 6
Date: 07/01/04, Rev: 04-07
Dual Encoder Feedback Option Card
PG-W2
f
PG
(Hz) = Maximum Motor Speed (RPM) x Encoder PPR (Pulses/Rev)
60
Figure 5. Using a Separate Encoder Power Supply
14. Master Encoder: If the master pulse reference source is an encoder, the PG-W2’s power supply can be utilized to power
that encoder. However, if the current draw from the PG-W2’s power supply exceeds 200mA, provide a separate power supply
as shown in Figure 5. If the momentary power loss ride thru function of the drive is to be used, include a backup capacitor in
the PG power wiring or take other necessary precautions.
15. Maximum Input Frequency: The maximum input frequency of the PG-W2 card is 300kHz. To find the output frequency
of the encoder (PG) in Hertz, use the following formula. Please make sure a 20% safety margin is built-in.