Allen-Bradley 20DF261N0ENNBNANE
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• 2 jaar garantie op alle reparaties
• Langdurige ondersteuning tot einde levensduur.
The Allen-Bradley 20DF261N0ENNBNANE is a PowerFlex 700S Phase II AC drive, part of Rockwell Automation's high-performance drive series designed for demanding variable speed motor control applications. This SKU encodes a specific configuration including a 261 A continuous output current rating, making it suitable for high-horsepower motor control. The PowerFlex 700S series is engineered for precise vector control and advanced motion coordination within integrated drive systems.
The 20DF261N0ENNBNANE features Direct Torque Control (DTC) and closed-loop flux vector control capabilities, enabling high dynamic response and accurate speed and torque regulation. It supports DriveLogix integration, allowing an embedded Logix-based controller to reside within the drive itself for coordinated motion and logic execution. Communication options within the 700S platform include DeviceNet, ControlNet, EtherNet/IP, and Profibus DP via option cards, and the drive incorporates advanced diagnostic capabilities with onboard fault logging. The unit is built for 480 V AC three-phase input and includes hardware enable and safe-off (STO) safety functionality compliant with relevant safety standards.
The PowerFlex 700S is widely deployed in industries such as oil and gas, metals and mining, pulp and paper, and material handling, where precise torque control and high dynamic performance are critical. It is commonly used on applications including extruders, winders, cranes, hoists, compressors, and large pump and fan systems requiring closed-loop speed regulation. The high current rating of this particular unit makes it appropriate for large motor loads where reliable, continuous high-current output is required under demanding duty cycles.
Technical Specifications
| Series/Product Family | PowerFlex 700S Phase II |
|---|---|
| Output Current (Continuous) | 261 A |
| Input/Operating Voltage | 480 V AC, 3-phase |
| Input Frequency | 50/60 Hz |
| Control Type | Closed-loop flux vector / Direct Torque Control (DTC) |
| Communication Interface | DeviceNet, ControlNet, EtherNet/IP, Profibus DP (via option cards) |
| Feedback Interface | Incremental encoder, resolver (via feedback option card) |
| Safety Features | Safe Torque Off (STO), Hardware Enable |
| Operating Temperature | 0 to 50 degrees C (with derating above 40 degrees C) |
| Storage Temperature | -40 to 70 degrees C |
| Relative Humidity | 5 to 95% non-condensing |
| IP/Protection Rating | IP00 / Open type |
| Mounting | Panel mount / cabinet mount |
| Certifications | UL, CE, cUL |
| Number of Axes | 1 |
Common Fault Codes
- Fault Code 2
- Auxiliary Input fault. The auxiliary input interlock has opened, indicating an external fault condition has been signaled to the drive.
Check the external device or circuit connected to the auxiliary input terminals. Verify wiring integrity and confirm the external interlock device is functioning correctly before resetting the fault. - Fault Code 12
- HW OverCurrent fault. The drive output current has exceeded the hardware overcurrent trip threshold.
Check for a short circuit or ground fault on the motor cables or motor windings. Verify motor load conditions and ensure acceleration ramp times are not too aggressive. Inspect output wiring and motor insulation. - Fault Code 13
- Ground Fault. A ground fault has been detected on the drive output, indicating current leakage to earth ground.
Disconnect the motor and test motor cable insulation resistance to ground. Inspect motor windings for insulation breakdown. Replace damaged cables or motor as required. - Fault Code 25
- Decel Inhibit fault. The drive is unable to decelerate within the programmed deceleration time, typically due to excessive regenerative energy.
Increase the deceleration time parameter. Consider adding a dynamic braking resistor or regenerative braking unit if the load has high inertia. Verify the bus voltage is within acceptable limits during deceleration. - Fault Code 33
- Auto Restart Tries fault. The drive has attempted to automatically restart the maximum number of times following a fault without successfully clearing the fault condition.
Identify and resolve the underlying fault that triggered repeated restart attempts. Review the fault queue log for the root cause fault code. Correct the root cause before re-enabling auto restart. - Fault Code 63
- SW OverCurrent fault. A software-detected overcurrent condition has occurred, where the output current has exceeded the programmed software overcurrent threshold.
Check motor load for mechanical overload or jamming. Verify current limit parameters are set appropriately for the application. Inspect motor and driven equipment for mechanical faults. - Fault Code 70
- Power Unit fault. An internal power structure fault has been detected, which may indicate a problem with the inverter section or gate driver circuitry.
Power down the drive and inspect the power module and gate driver boards for visible damage. Check DC bus voltage and verify cooling is adequate. A failed power module or gate driver board may require replacement. - Fault Code 100
- Parameter Checksum fault. The drive has detected a checksum error in stored parameter data, indicating possible memory corruption.
Reload parameters from a backup file using DriveExecutive or Studio 5000 software. If the fault persists after reloading parameters, the control board memory may be faulty and the control board may require replacement.
Frequently Asked Questions
What is the continuous output current rating of the 20DF261N0ENNBNANE?
The 20DF261N0ENNBNANE is rated for 261 A continuous output current, making it suitable for driving large AC motors in high-horsepower applications at 480 V AC.
What communication protocols does the PowerFlex 700S support?
The PowerFlex 700S supports multiple communication protocols via option cards, including EtherNet/IP, ControlNet, DeviceNet, and Profibus DP. The specific communication option installed depends on the drive configuration at time of order.
Does the 20DF261N0ENNBNANE support Safe Torque Off (STO) functionality?
Yes, the PowerFlex 700S Phase II includes a hardware Safe Torque Off (STO) function that removes the gate firing signals to the output power devices, providing a safety-rated means of preventing unintended motor rotation.
Can the PowerFlex 700S operate in closed-loop vector control mode?
Yes, the PowerFlex 700S is designed for closed-loop flux vector control and supports encoder or resolver feedback via a feedback option card, enabling precise speed and torque regulation for demanding applications.
What software is used to configure and program the PowerFlex 700S?
The PowerFlex 700S can be configured using Rockwell Automation's DriveExecutive software or through Studio 5000 Logix Designer when using the integrated DriveLogix controller option. A human interface module (HIM) can also be used for basic parameter configuration.
Troubleshooting
Drive displays a recurring Ground Fault (Fault Code 13) after reset
Disconnect the motor cables from the drive output terminals and perform an insulation resistance (megger) test on the motor cables and motor windings to ground. Check for values below 1 MOhm which indicate insulation breakdown.
Replace damaged motor cables with appropriately rated shielded cable. If the motor windings show low insulation resistance, the motor requires rewinding or replacement. Ensure cable shields are properly terminated at the drive end only.
Drive powers up but does not respond to start command
Verify the hardware enable input is active and that the drive is not in a faulted state. Check the control wiring to the digital input terminals and confirm the correct control source (terminal block, network, or HIM) is selected in the drive parameters.
Confirm the enable input signal is present at the correct terminal. Clear any active faults via the HIM or control system. Verify the Start Source and Speed Reference parameters are configured to match the intended control method.
Drive trips on HW OverCurrent (Fault Code 12) during acceleration
Monitor output current during acceleration using the HIM or DriveExecutive. Check if the current exceeds the drive rating during ramp-up. Inspect the motor and mechanical load for binding or excessive inertia.
Increase the acceleration time parameter to reduce the rate of current rise. Verify the motor nameplate data is correctly entered in the drive parameters. Inspect the driven load for mechanical issues such as bearing failure or jamming.
Erratic speed or torque control in closed-loop mode
Check the encoder or resolver feedback wiring for loose connections, incorrect shielding, or excessive cable length. Verify the feedback device PPR or resolver pole count matches the configured parameter values in the drive.
Re-terminate all feedback wiring using properly shielded cable with the shield grounded at the drive end. Correct the feedback device parameters in the drive configuration. If the feedback device is damaged, replace it with a compatible encoder or resolver.
Drive overheats and triggers thermal fault
Check the ambient temperature around the drive enclosure and verify that cooling fans are operational. Inspect heatsink fins and internal airflow paths for dust or debris blockage. Confirm the drive is not operating above its rated current for extended periods.
Clean heatsink fins and internal air passages using dry compressed air. Ensure enclosure ventilation is adequate and ambient temperature does not exceed 40 degrees C without derating. Replace failed cooling fans. If the load consistently exceeds the drive rating, consider a higher-rated drive.
| Condition | Repair, Used, Refurbished, New in box (sealed) |
|---|
Common defects
Common defects on a Allen-Bradley 20DF261N0ENNBNANE 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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