VFD68 Variable Frequency Drives (575 VAC)
17
Making Low-Voltage Wiring Connections
Low-voltage wiring terminals are located underneath the front cover. After you finish making the low-voltage
wiring connections, replace the front cover. .
Table 11: VFD68Dxx Drives Low-Voltage Connection Information for the Primary Board (Part 1 of 2)
Terminal
Label
1
Signal Type Description
RH Contact Input Run High Speed
RM Contact Input Run Medium Speed
RL Contact Input Run Low Speed
MRS Contact Input Current Input Selection - Connect terminal MRS to terminal SD to enable the
4–20 mA input, Analog Input 2 (AI2).
RES Contact Input Reset - Turn on the RES signal (100 ms or longer) to turn off the VFD output and
reset the thermal relay and regenerative brake circuits
SD Common Common for contact inputs (using Sink logic - default setting) and 24 VDC supply
AM Analog Output
0
–10 VDC analog output corresponding to output frequency
PC +24V +24 VDC Supply
SE Open Collector
Common
Common for RUN terminal
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.
FU Open Collector
Transistor Output
Frequency detection output - switched low (transistor conducts) when VFD output
frequency has reached or exceeded the detection frequency. Switched high
(transistor is off) when VFD output frequency is below detection frequency.
A Relay Output (N.O.) During normal operation, relay contacts A and C are connected. (maximum alarm
load: 230 VAC, 0.3 A or 30 VDC, 0.3 A).
Figure 11: VFD68Dxx Drives Connection Information
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