20G11ND5P0AA0NNNNN — 755 Series AC Drive, 480V Three-Phase, 5 HP / 3.7 kW

The 20G11ND5P0AA0NNNNN is a 480V three-phase AC drive from the 755 series, rated at 5.0A continuous output current — approximately 3.7 kW / 5 HP under normal duty conditions. It carries the full 755 platform feature set: multiple control modes from V/Hz through closed-loop flux vector, up to five option card slots for communication and I/O expansion, integrated Safe Torque Off, and the protection functions typical of the 755 family. The Normal Duty (ND) rating positions it for loads with low overload requirements — pumps, fans, centrifugal compressors — at the 5 HP power level.

At 5 HP, this drive sits in a heavily-used range in industrial applications. Five-horsepower motors run cooling tower fans, centrifugal pumps in process systems, conveyors at moderate throughput, exhaust fans on industrial ovens, and hydraulic power units for smaller presses. The 755 series at this rating delivers the communication flexibility and diagnostic depth that simple drives at this power level lack — relevant when the application is part of an EtherNet/IP network where drive visibility matters.

Specifications

Parameter	Value
Part Number	20G11ND5P0AA0NNNNN
Series	755 Series
Output Current (Normal Duty)	5.0 A
Motor Power (approx. @ 480V)	3.7 kW / 5 HP
Input Voltage	380–480V AC, Three-Phase
Output Frequency Range	0–400 Hz
Control Modes	V/Hz, Sensorless Vector (SVC), Flux Vector (FV, with encoder option)
Onboard I/O	6 digital inputs, 1 digital output, 2 analog inputs, 1 analog output
Option Card Slots	Up to 5
Safe Torque Off (STO)	Category 3 / PLd (hardwired, standard)
Dynamic Braking	Internal transistor; external resistor required
Enclosure	IP20 / Open Type (Frame 3)
Operating Temperature	0°C to 50°C (derate above 40°C)
Approvals	UL 508C, CE, C-Tick, RoHS

5 HP on 480V — Where This Drive Gets Used

Five horsepower at 480V covers a wide enough range of loads that application-specific considerations matter more than the raw power rating.

Centrifugal Pumps and Fans

The most common application at this power level. Centrifugal loads follow the affinity laws — torque and power scale with speed squared and cubed respectively. Running a centrifugal pump at 70% speed cuts power draw to roughly 34% of full speed consumption. For systems that previously ran fixed-speed with a throttle valve or damper for flow control, switching to variable speed with a 755 drive typically recovers the added drive cost in energy savings within one to three years. V/Hz mode is entirely sufficient for centrifugal loads; SVC adds nothing practically useful for a pump or fan that's never at zero speed under load.

Conveyor Drives

At 5 HP, conveyor drives frequently need the torque boost at low speed that SVC provides — particularly on loaded conveyors that start with product on the belt. SVC keeps torque available as the belt accelerates through the low-frequency range where V/Hz mode's fixed voltage-to-frequency ratio underdelivers. Run an autotune before commissioning in SVC mode; accurate motor parameters are what make the torque estimation reliable.

Industrial Ventilation

Exhaust fans, supply air fans, and smoke extraction systems at 5 HP benefit from variable speed for both energy savings and noise reduction. The 755's internal PID function allows the fan to regulate to a duct pressure setpoint from an analog pressure sensor, maintaining constant duct pressure as dampers open and close throughout the ventilation system — without requiring a PLC to close the pressure loop.

FAQ

Q: What communication cards are available for this drive?

The 755 option card slots accept EtherNet/IP (20-COMM-E), DeviceNet (20-COMM-D), Profibus DP (20-COMM-P), Modbus/TCP (20-COMM-EM), and other protocols. Up to one communication card per drive; the slot assignment for the comm card depends on what other option cards are installed — check the 755 option card installation documentation for the specific slot rules.

Q: Does the drive include a bypass circuit?

No. The 755 series does not include an internal bypass contactor. For applications requiring motor bypass capability (the motor running directly from the AC supply if the drive faults), an external bypass panel with appropriate contactors and interlocks must be designed separately.

Q: Can the drive's internal PID be used for pressure or flow control without a PLC?

Yes. The 755 includes a configurable PID function that uses the analog input as the process feedback and regulates the drive output frequency to maintain the setpoint. Suitable for simple single-loop applications — duct pressure, tank level, flow rate — without PLC involvement. More complex control logic (multiple setpoints, cascade loops, feedforward) requires a PLC.

Q: Can this drive be used outdoors?

The IP20 enclosure is for indoor, clean, dry panel mounting only. For outdoor or harsh-environment use, the drive must be installed inside an enclosure with appropriate IP or NEMA rating for the environment. Alternatively, the 755 series has IP66 / NEMA 4X variants for direct outdoor or wash-down installation.

Q: What happens if the STO input is de-energized while the motor is running?

STO inhibits gate pulses to the output transistors — the motor coasts to stop under its own inertia. It does not actively decelerate the motor. For applications where an uncontrolled coast is hazardous, a Safe Stop 1 (SS1) sequence that decelerates the motor first, followed by STO engagement, must be designed into the safety architecture.

20G11ND5P0AA0NNNNN Brand New 20G11ND022AA0NNNNN 755 AC Drive