VFD68 Variable Frequency Drives (575 VAC)
19
Input Wiring Connections
Wire the input device to the analog input terminals and make any necessary parameter adjustments. See
Setup and Adjustment
on page 20 and Parameter Settings Calculations for Motor Speed vs. Pressure on page
25 for more information.
0.5–4.5 VDC Ratiometric P499 Transducer
The default parameter settings (Table 13) on the VFD68 Drive are configured to operate a condenser fan motor
on an R410 condensing unit, using a
P499RCP-107 or P499RAP-107 Ratiometric Transducer (Figure 12).
For high-pressure refrigerants other than R410a, you must calculate and change the P.90x parameters. For
medium and low pressure refrigerants, you must determine the proper P499R Transducer and then calculate
and change the P.90x parameters.
For more information, see Setup and Adjustment
on page 20 and Parameter Settings Calculations for Motor
Speed vs. Pressure on page 25.
Note: To use a 0–10V or 4–20mA P499 Transducer, refer to the VFD68 Variable Frequency Drive Technical
Bulletin (Part No. 24-7664-3051).
Table 13: Settings for a 0.5–4.5 VDC Transducer
Setting
0
–5 V
Analog Input Terminals IN1 and IN2
Figure 12: Wiring 0.5 to 4.5 VDC Ratiometric Input Signal Transducers
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