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VFD68 Variable Frequency Drives
32
Input Wiring Connections
Making Input Wiring Connections on VFD68Bxx and VFD68Cxx Drives
Wire the input device to the analog input terminals (Table 26) and make any necessary parameter adjustments.
See
on page 38 and
Parameter Setting Calculations for Motor Speed vs. Pressure
page 49 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 factory
supplied jumper to allow 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 25:
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 26: Wiring P499 Transducers as Input Devices
Signal
P499R Ratiometric Transducers
Analog Input Terminal
AI1
White wire of first transducer
Terminal 2
AI2
White wire of second transducer
Terminal 4
+5 V
Red wire
Terminal 10
ACOM
Black wire
Terminal 5
Table 24: VFD68Dxx Drives Low-Voltage Connection Information for the Primary Board (Part 2 of 2)
Terminal
Label
1
Signal Type
Description