VFD68 Variable Frequency Drive (575 VAC) Installation Instructions
17
Input Wiring Connections
Wire the input device to the analog input terminals and make any necessary parameter adjustments. See
Parameter Settings Calculations for Motor Speed vs. Pressure
on page 24 for
more information.
B
Relay Output (N.C.)
During normal operation, relay contacts B and C are connected (maximum alarm
load: 230 VAC, 0.3 A or 30 VDC, 0.3 A).
C
Relay Output (C)
Relay output common
10
+5 V
+5 VDC Supply for P499R Transducers (15 mA maximum)
2
Analog Input
Analog Input 1 (AI1) accepts 0
–
5 V or 0
–
10 V DC analog input signals
5
Analog Common
Common for analog inputs
4
Analog Input
Analog Input 2 (AI2) accepts 4
–
20 mA analog input signals
SD
Common
Common for contact inputs (when using Sink logic - default setting).
STF
Contact Input
Forward rotation. Must connect STF to SD terminal (common) using the
factory-supplied jumper to allow the VFD to rotate in a forward direction.
STR
Contact Input
Reverse rotation (not used)
SD
Common
Common for contact inputs (when using Sink logic - default setting).
1.
Gray cells indicate a terminal that is typically not used in condenser fan speed control applications.
Table 12:
VFD68Dxx Drives Low-Voltage Connection Information for the High Input Signal
Select Board
Terminal
Label
Signal Type
Description
5V
+5V
+5 VDC Supply for P499R Transducers (15 mA maximum)
IN1
Analog Input
Analog Input 1 for 0.5 to 4.5 V Ratiometric High Signal Select
GND
Analog Common
Common for analog inputs
5V
+5V
+5 VDC Supply for P499R Transducers (15 mA maximum)
IN2
Analog Input
Analog Input 2 for 0.5 to 4.5 V Ratiometric High Signal Select
GND
Analog Common
Common for analog inputs
Table 11: VFD68Dxx Drives Low-Voltage Connection Information for the Primary Board (Part 2 of 2)
Terminal
Label
1
Signal Type
Description