About this task
Low-voltage wiring terminals are located underneath the front cover. See Figure 1, Table 1, and Table 2. After you finish making the low-voltage wiring connections, replace the
front cover (Figure 1).
Figure 1. VFD68Dxx Drives Connection Information
| Terminal Label1 | 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). |
| 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). |
| 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 |
1 Gray cells
indicate a terminal that is typically not used in condenser fan speed control
applications.