Making Low-Voltage Wiring Connections on VFD68Bxx and VFD68Cxx Drives - PENN Controls - VFD68Bxx - VFD68Cxx - VFD68Dxx - Three‐Phase Motor Speed Controller - VFD68 Three‐Phase Variable Frequency Drive

VFD68 Variable Frequency Drives Technical Bulletin
Product
Document type
Technical Bulletin
Document revision
C
Revision date
2019-08-09
Part number
24-7664-3051

About this task

Important: If using two input devices, both devices must be identical. Do not use input devices with different ranges and operating characteristics.
Low-voltage wiring terminals are located underneath the front cover. See Figure 1 and Table 1.
Figure 1. VFD68Bxx and VFD68Cxx Drives Low-Voltage Connections

Table 1. VFD68Bxx and VFD68Cxx Drives Low-Voltage Connections Information
Terminal Label Signal Type Description1
10 +5VDC Provides + 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 0–5 V, 0–10 V, or 4–20 mA analog input signals
AM Analog Output Provides a 0–10 VDC analog output signal corresponding to output frequency
RUN Open Collector Transistor Output VFD Running - Switched low (transistor conducts) when the VFD output frequency is higher than the start frequency (the motor is running). Switched high (transistor is off) when the motor is off.
SE Open Collector Common Common for RUN terminal
SO Open Collector Transistor Output Safety Stop Output
S1 Safety Stop Input Terminals S1 and S2 must connect to terminal SC or the VFD shuts off.
S2 Safety Stop Input Terminals S1 and S2 must connect to terminal SC or the VFD shuts off.
SC Safety Stop Common Common for S0, S1, and S2 terminals
SD Common Common for + 24 VDC Supply and contact inputs (using Sink logic - default setting)
RL Contact Input Run Low Speed
RM Contact Input Run Medium Speed
RH Contact Input Run High Speed
SD Common Common for + 24 VDC Supply and contact inputs (when using Sink logic - default setting)
PC +24 VDC Provides + 24 VDC excitation voltage, 100 mA maximum. Use for P499A or P499V transducers.
STF Contact Input Forward rotation. Connect STF to SD terminal (common) to enable VFD to rotate forward.
STR Contact Input Reverse rotation (used to reverse motor rotation)
A Relay Output (N.O.) During normal operation, relay contacts A and C are open. (maximum alarm load: 230 VAC, 0.3 A or 30 VDC, 0.3 A)
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

To connect the input signal devices:

Procedure

  1. Loosen the screws on the front cover and remove the cover to access the low-voltage wiring (Figure 1).
  2. Locate the low-voltage wiring terminals (Figure 2).
    Figure 2. Locating the Low-Voltage Wiring Terminals

  3. Push down on the orange tab to open the terminal (Figure 3).
    Important: Do not pull the wires out of the terminal block without pushing the orange tab all the way down. Pulling wires out of the low-voltage terminal block without opening the terminal may damage the terminal block or circuit board.
  4. Insert the wire and release the orange tab to secure the wire.
    Figure 3. Wiring Analog Input Devices to the VFD68 Control

  5. Wire the input devices to the analog input terminals (see Low-Voltage Wiring Connections) and make any necessary parameter adjustments.
  6. Replace the front cover.
1 Gray cells indicate a terminal that is typically not used in condenser fan speed control applications. Terminal RL (Run Low Speed) corresponds to P. 6; Terminal RM (Run Medium Speed) corresponds to P. 5; Terminal RH (Run High Speed) corresponds to P. 4. When one of these terminals is connected to SD (common) the VFD runs at the speed shown in the corresponding parameter. Terminal STR (reverse rotation) is disabled by P. 78 setting = 1. This terminal is not useful for condenser fan speed control applications. Terminals A, B, and C are connected to relay contacts that activate when a fault has occurred and the VFD output has stopped.