Allen‑Bradley 20G11NC104JA0NNNNN – PowerFlex 755 High-Performance AC Variable Frequency Drive

Full Model Code Breakdown

• 20G = PowerFlex 755 standard performance drive
• 1 = AC input with precharge circuit & DC bus terminals
• N = IP20 / NEMA Open Type enclosure
• C = 380–480 VAC 3-phase input (400V class, DC bus 540VDC)
• 104 = Rated output current 104A
• J = Built-in EMC input filter, common-mode jumper factory fitted
• A = Dynamic braking transistor built-in (no internal brake resistor)
• 0 = No door-mounted HIM human interface module
• NNNNN = No extra factory options (standard base unit)

Core Electrical Specifications

1. Power Ratings

• Normal Duty (ND): 55 kW / 75 HP, 104 A continuous output
• Heavy Duty (HD): 45 kW, 92 A continuous output

2. Input Power

• 3-phase 380–480 VAC, 50/60 Hz
• Integrated precharge circuit, DC bus terminals available for external brake resistor

3. Output Performance

• Max output frequency: 590 Hz
• Control Technology: TotalFORCE vector control, sensorless vector, V/Hz, permanent magnet motor control

4. Cooling & Protection

• Forced air cooling
• Built-in dynamic brake transistor (match external AB AK-R series brake resistors)
• Overcurrent, overvoltage, undervoltage, overheat, motor stall, ground fault protection

5. Communication Interfaces

• Embedded dual-port EtherNet/IP (supports DLR ring topology)
• RS485 Modbus RTU standard port
• Expandable with optional ControlNet, DeviceNet, analog I/O, encoder feedback cards

6. I/O Terminals

• Digital inputs, relay outputs, analog 4–20mA / 0–10V signal terminals
• Supports encoder feedback for closed-loop high-precision motion

7. Mechanical & Environmental

• Enclosure rating: IP20 open type
• Operating temperature: 0 °C ~ +60 °C (derate at high ambient)
• Mounting: Vertical cabinet DIN rail / panel mount
• Weight: ~24 kg
• Certifications: UL/cULus, CE, IEC 61800, RoHS

Key Features

1. TotalFORCE high-precision torque control
    
   Fast torque response, stable low-speed performance for heavy starting & precise positioning equipment.
2. Integrated EMC input filter
    
   Reduces cabinet radiated interference, complies with industrial EMC standards without extra filter modules.
3. Embedded EtherNet/IP with DLR
    
   Direct connection to ControlLogix controllers, supports device-level ring redundant network for zero downtime communication.
4. Built-in dynamic braking transistor
    
   Enables fast motor deceleration by connecting external braking resistors for frequent start-stop cycles.
5. Automatic Device Configuration (ADC)
    
   When drive is replaced, Logix controller auto-downloads all parameter settings without manual programming.
6. Modular expandable design
    
   Slots for encoder feedback, safety cards, extra communication adapters, safety torque-off (STO) options.
7. Hot-swap optional I/O & communication cards
    
   Simplifies on-site maintenance without powering down the whole cabinet.
8. Wide motor compatibility
    
   Supports standard induction motors, high-speed spindles and permanent magnet servo motors.

Typical Applications

• Heavy-duty material handling: large conveyors, stackers, cranes
• Printing, winding, cutting, flying shear high-speed motion lines
• Mining, metallurgy large fan/pump variable speed energy-saving control
• Packaging, automotive assembly multi-axis synchronized production lines
• Process industry large blower, compressor, mixer motor regulation