Allen-Bradley 20F1AND415AA0NNNNN
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The Allen-Bradley 20F1AND415AA0NNNNN is a PowerFlex 700S series AC variable frequency drive manufactured by Allen-Bradley, a brand of Rockwell Automation. This unit belongs to the Phase II control platform of the PowerFlex 700S family, designed for high-performance vector control of AC induction and permanent magnet motors. The SKU 20F1AND415AA0NNNNN decodes to a 480V AC input, 415A output current rating, making it suitable for high-power motor control applications requiring precise speed and torque regulation.
The PowerFlex 700S drive features direct torque control (DTC) and closed-loop vector control modes, enabling precise dynamic response without the need for a tachometer in many applications. It supports multiple feedback interface options including incremental encoders and resolvers, and communicates via an embedded DeviceNet port as well as optional communication adapter modules supporting EtherNet/IP, ControlNet, Profibus, and other industrial protocols. The drive incorporates advanced safety functionality compatible with Safe Torque Off (STO) to SIL 2 / PLd standards, and includes a comprehensive suite of onboard diagnostics, configurable I/O, and DriveLogix programmable control capability on select configurations. The power structure is built for robust industrial environments with a full-featured gate driver and IGBT inverter stage rated for continuous high-current operation.
The PowerFlex 700S at this power rating is commonly deployed in heavy industrial applications such as metal processing, mining conveyors, paper and pulp machinery, extruders, compressors, and large pump and fan systems. Its closed-loop vector performance makes it well suited for winding and unwinding lines, cranes, hoists, and test stands where precise torque control at low speed is critical. The drive's scalable communication options and compatibility with Rockwell Automation's Logix control platform make it a natural fit for integrated machine and process automation architectures in manufacturing and infrastructure industries.
Technical Specifications
| Series / Product Family | PowerFlex 700S |
|---|---|
| Input Voltage | 480V AC (3-phase) |
| Output Current (Continuous) | 415 A |
| Power Rating | Approximately 250 kW (335 HP) at 480V |
| Control Type | Closed-Loop Vector / Direct Torque Control (DTC) |
| Feedback Interface | Incremental Encoder, Resolver (via option card) |
| Communication Interface | Embedded DeviceNet; optional EtherNet/IP, ControlNet, Profibus DP |
| Safety Features | Safe Torque Off (STO), SIL 2 / PLd compliant |
| Operating Temperature | 0 to 50 degrees C (derating may apply above 40 degrees C) |
| Storage Temperature | -40 to 70 degrees C |
| Relative Humidity | 5 to 95% non-condensing |
| IP / Protection Rating | IP00 (open type chassis) |
| Mounting | Chassis / panel mount |
| Certifications | UL, CE, cUL |
| Input Frequency | 50 / 60 Hz |
| Output Frequency Range | 0 to 400 Hz |
Common Fault Codes
- Fault Code 2
- Auxiliary input fault. An external fault signal has been received via the auxiliary input terminal.
Check the wiring and status of the device connected to the auxiliary input. Clear the external fault condition and reset the drive. - Fault Code 12
- HW OverCurrent. The drive output current has exceeded the hardware overcurrent trip threshold.
Check for a short circuit or ground fault on the motor cables. Verify motor and load are not mechanically jammed. Inspect IGBT power modules for damage. - Fault Code 13
- Ground Fault. Excessive current is detected flowing to ground on the drive output.
Disconnect the motor and test insulation resistance of motor windings and output cables. Replace damaged cables or motor if insulation has failed. - Fault Code 25
- Decel Inhibit. The drive cannot decelerate at the programmed rate because the DC bus voltage has exceeded the overvoltage threshold.
Increase the deceleration time, enable dynamic braking, or install a braking resistor. Check supply voltage for overvoltage conditions. - Fault Code 29
- Analog Input Loss. The analog input signal has fallen below the configured minimum threshold, indicating a broken or disconnected signal wire.
Check wiring to the analog input terminals. Verify the signal source is active and within range. Adjust the loss-of-signal fault action parameter if appropriate. - Fault Code 33
- Auto Restart Tries. The drive has exceeded the maximum number of automatic restart attempts following a fault.
Identify and resolve the underlying fault that triggered repeated restarts. Manually reset the drive after correcting the root cause. - Fault Code 70
- Power Unit Fault. An internal power structure fault has been detected, which may indicate a failed IGBT, gate driver, or power supply within the drive.
Cycle power and attempt to reset. If the fault persists, inspect the power module and gate driver boards. Contact a qualified service technician for internal component inspection. - Fault Code 81
- Encoder Loss. The drive has lost the encoder feedback signal during closed-loop operation.
Check encoder wiring, connector seating, and encoder power supply voltage. Verify encoder is functioning correctly with a separate signal tester. Replace encoder if defective.
Frequently Asked Questions
What is the continuous output current rating of the 20F1AND415AA0NNNNN?
The 20F1AND415AA0NNNNN is rated for 415A continuous output current at 480V AC, corresponding to approximately 250 kW (335 HP) of motor drive capability.
What communication protocols does the PowerFlex 700S support?
The PowerFlex 700S includes an embedded DeviceNet port as standard. Additional protocols including EtherNet/IP, ControlNet, Profibus DP, and others are supported via optional communication adapter cards installed in the drive's option slot.
Does this drive support Safe Torque Off (STO) safety functionality?
Yes, the PowerFlex 700S supports Safe Torque Off (STO) functionality rated to SIL 2 and PLd, allowing the drive to be integrated into safety-rated machine control systems without requiring a separate safety contactor in many applications.
Can the PowerFlex 700S operate in closed-loop vector mode with encoder feedback?
Yes, the drive supports closed-loop vector control using incremental encoder feedback. Resolver feedback is also supported via an optional feedback adapter card, enabling high-precision speed and torque control.
What is the input voltage and frequency specification for this drive?
The 20F1AND415AA0NNNNN is designed for 480V AC three-phase input at 50 or 60 Hz. Input voltage tolerance is typically plus or minus 10% of nominal.
Troubleshooting
Drive trips on overcurrent fault immediately after enabling output
Measure insulation resistance of motor cables and motor windings phase-to-phase and phase-to-ground. Check for short circuits at the output terminals. Review current limit and motor nameplate parameter settings in the drive.
Repair or replace damaged motor cables. If motor insulation has failed, replace or rewind the motor. Ensure motor nameplate data is correctly entered in the drive parameters and that current limit settings are appropriate for the load.
Drive powers up but displays a blank or unresponsive HIM (Human Interface Module)
Check the HIM connection and seating on the drive. Verify the drive control power supply is functioning by checking for 24V DC at the control board terminals. Attempt to connect via DriveExplorer or Studio 5000 software to confirm drive processor is operational.
Reseat or replace the HIM module. If the control power supply is faulty, inspect the internal SMPS board and replace if necessary. If the drive responds via software but not the HIM, the HIM itself requires replacement.
Encoder loss fault occurs intermittently during operation
Inspect encoder cable routing for proximity to high-voltage power cables. Check connector pins at both the encoder and the drive feedback card for corrosion or loose contacts. Measure encoder supply voltage under load.
Re-route encoder cables away from power wiring and use shielded cable with the shield grounded at one end. Clean and reseat connectors. If the encoder supply voltage is low, check the feedback card output. Replace the encoder or feedback card if faults persist.
Drive runs but motor speed does not match the commanded reference
Verify the analog or network speed reference signal level at the drive input terminals. Check parameter settings for reference scaling, minimum and maximum frequency, and any active speed trim or ratio functions. In closed-loop mode, confirm encoder PPR setting matches the physical encoder.
Correct reference scaling parameters to match the signal source range. Verify encoder pulses-per-revolution parameter matches the installed encoder. Perform an autotune routine to update motor model parameters if speed regulation accuracy is poor.
Drive overheats and triggers a thermal fault during normal operation
Check ambient temperature at the drive installation location. Inspect heatsink fins and internal fans for dust or debris blockage. Verify that the load current does not exceed the drive's continuous rating. Review the drive's output current log in fault history.
Clean heatsink fins and replace cooling fans if they are not operating at full speed. Ensure adequate ventilation clearances around the drive enclosure. If the load consistently exceeds rated current, consider upsizing the drive or reducing the load.
| Condition | Repair, Used, Refurbished, New in box (sealed) |
|---|
Common defects
Common defects on a Allen-Bradley 20F1AND415AA0NNNNN are:
Power Supply Related Issues
- No power / drive not turning on
- Blown fuses
- Defective rectifier bridge
- Damaged DC bus capacitors
- IGBT / MOSFET module failure
- Overvoltage / undervoltage errors
Control & Electronics Failures
- Faulty control board or PCB damage
- Firmware or memory corruption
- Fieldbus communication errors (Profibus, Modbus, EtherCAT, CANopen)
- Input / output circuit damage
- Gate driver module failure
Motor Control Problems
- Motor not starting or no output
- Unstable speed control
- No torque output
- Trip during acceleration or deceleration
- Encoder feedback errors
Thermal & Cooling Defects
- Overheating due to failed cooling fans
- Defective temperature sensors
- Poor heatsink performance
Mechanical & Environmental Damage
- Burnt or loose connectors
- PCB track damage
- Corrosion or moisture ingress
- Oil, dust or contamination damage
- Cracked solder joints
Error Codes & Drive Trips
- Overcurrent faults (OC)
- Ground fault / earth leakage error
- Short-circuit fault
- Motor or drive overload
- Overvoltage or undervoltage error
- Undervoltage trip when starting or stopping
- Phase loss / imbalance
- Synchronization issues with multiple drives
Other
- Display defect
- Control keys or keypad not working
- Parameters no longer readable or lost
- Brake resistor problems (brake chopper defect)
- Internal relays/contactors defective
- EMI/RFI interference due to defective filters
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