AC Servo 1391

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The Allen-Bradley AC Servo 1391 series is a family of AC servo controllers. To maintain the UL listing, the power to an AC Servo 1391 controller must be provided from an Allen-Bradley 1391 Isolation Transformer. Only users trained on 1391 servo controllers and associated equipment should be involved in the planning and implementation of this controller system. Furthermore, static control procedures should be followed to minimize the probability of component damage. The AC Servo 1391 controllers are PWM (Pulse Width Modulated) servo controllers which are dedicated, single-AC-axis AC servo controllers. They are typically used along with computer-aided closed-loop positioning systems to control the position and rotary or linear motion of machine parts on an automated machine. AC Servo 1391 controllers are designed for panel mounting inside an enclosure. These controllers included an internal fan for air circulation. 


The AC Servo 1391 controllers convert a 3-phase input voltage at 50 to 60 Hertz to variable voltage with controlled amplitude, phase, and frequency values. The output is used to regulate the speed and/or torque of a 1326 AC servo motor. The AC Servo 1391 controllers are available in ratings of 15 Amps, 22.5 Amps, and 45 Amps RMS with all these current ratings available in the same package size. The corresponding output power ratings are 5 kilowatts, 7.5 kilowatts, and 15 kilowatts, respectively. The rated ambient temperature for the AC Servo 1391 controllers is from 0 to 60 degrees Celsius and the storage temperature is from 0 to 65 degrees Celsius. The output of the integrated cooling fan is 50 CFM. The AC Servo 1391 controllers must be mounted inside suitable enclosures where they are protected from contaminants such as oil, dust, and coolants.

Allen-Bradley AC Servo 1391 Drives

Technical Specifications 

  • AC Servo 1391 Drives nominal bus output voltage is 300V DC
  • Input voltage is 230V AC
  • Continuous power output ranges from 5-15kW
  • Peak power output ranges from 10-45kW

Allen-Bradley AC Servo 1391 Drives

Technical Specifications 

  • AC Servo 1391 Drives nominal bus output voltage is 300V DC
  • Input voltage is 230V AC
  • Continuous power output ranges from 5-15kW
  • Peak power output ranges from 10-45kW
AC Servo 1391 Description Stock Level
1391-150ET The Allen-Bradley 1391-150ET Isolation Transformer has a 15 kVA Rating and a 240/380/415/480V AC Primary Voltage.
Available Now
1391-AA15 The Allen-Bradley 1391-AA15 AC Servo Controller has a 17A RMS Input Circuit Breaker Rating and a 1300A Circuit Breaker I...
Available Now
1391-AA22 The Allen-Bradley 1391-AA22 AC Servo Controller has a 26A RMS Input Circuit Breaker Rating and a 1300A Circuit Breaker I...
In Stock
1391-AA45 The Allen-Bradley 1391-AA45 AC Servo Controller has a 38A RMS Input Circuit Breaker Rating and a 1300A Circuit Breaker I...
Available Now
1391-DES15-DI-AQB The Allen-Bradley 1391-DES15-DI-AQB Digital AC Servo Drive has a 30A Peak Current (RMS) and a 5 kW Continuous Po...
In Stock
1391-DES15-DI-AQB-A The Allen-Bradley 1391-DES15-DI-AQB-A Digital AC Servo Drive has a 30A Peak Current (RMS) and a 5 kW Continuou...
Available Now
1391-DES22-DI The Allen-Bradley 1391-DES22-DI Digital AC Servo Drive has a 45A Peak Current (RMS) and a 7.5 kW Continuous Power Ou...
In Stock
1391-DES22-DI-AQB The Allen-Bradley 1391-DES22-DI-AQB Digital AC Servo Drive has a 45A Peak Current (RMS) and a 7.5 kW Continuous ...
In Stock
1391-DES45-DI The Allen-Bradley 1391-DES45-DI Digital AC Servo Drive has a 90A Peak Current (RMS) and a 15 kW Continuous Power Out...
Available Now
1391-DES45-DI-AQB The Allen-Bradley 1391-DES45-DI-AQB Digital AC Servo Drive has a 90A Peak Current (RMS) and a 15 kW Continuous P...
In Stock
1391-DES45-DI-AQB-A The Allen-Bradley 1391-DES45-DI-AQB-A Digital AC Servo Drive has a 90A Peak Current (RMS) and a 15 kW Continuo...
Available Now
1391-T015DT The Allen-Bradley 1391-T015DT Isolation Transformer has a 1.5 kVA Rating and a 240/480V AC Primary Voltage.
Available Now
1391-T035DT The Allen-Bradley 1391-T035DT Isolation Transformer has a 3.5 kVA Rating and a 240/480V AC Primary Voltage.
Available Now
1391-T035ET The Allen-Bradley 1391-T035ET Isolation Transformer has a 3.5 kVA Rating and a 240/380/415/480V AC Primary Voltage.
Available Now
1391-T035NT The Allen-Bradley 1391-T035NT Isolation Transformer has a 3.5 kVA Rating and a 208/230/460/575V AC Primary Voltage.
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1391-T050DT The Allen-Bradley 1391-T050DT Isolation Transformer has a 5 kVA Rating and a 240/480V AC Primary Voltage.
Available Now
1391-T050ET The Allen-Bradley 1391-T050ET Isolation Transformer has a 5 kVA Rating and a 240/380/415/480V AC Primary Voltage.
Available Now
1391-T100DT The Allen-Bradley 1391-T100DT Isolation Transformer has a 10 kVA Rating and a 240/480V AC Primary Voltage.
In Stock
1391-T100ET The Allen-Bradley 1391-T100ET Isolation Transformer has a 10 kVA Rating and a 240/380/415/480V AC Primary Voltage.
Available Now
1391-T125DT The Allen-Bradley 1391-T125DT Isolation Transformer has a 12.5 kVA Rating and a 240/480V AC Primary Voltage.
Available Now
1391-T150DT The Allen-Bradley 1391-T150DT Isolation Transformer has a 15 kVA Rating and a 240/480V AC Primary Voltage.
Available Now
1391B-AA15 The Allen-Bradley 1391B-AA15 AC Servo Controller has a 17A RMS Input Circuit Breaker Rating and a 1300A Circuit Breaker...
Available Now
1391B-AA15-A12 The Allen-Bradley 1391B-AA15-A12 AC Servo Controller has a 17A RMS Input Circuit Breaker Rating and a 1300A Circuit...
Available Now
1391B-AA22 The Allen-Bradley 1391B-AA22 AC Servo Controller has a 26A RMS Input Circuit Breaker Rating and a 1300A Circuit Breaker...
Available Now
1391B-AA45 The Allen-Bradley 1391B-AA45 AC Servo Controller has a 38A RMS Input Circuit Breaker Rating and a 1300A Circuit Breaker...
In Stock
1391B-AA45-A06 The Allen-Bradley 1391B-AA45-A06 AC Servo Controller has a 38A RMS Input Circuit Breaker Rating and a 1300A Circuit...
Available Now
1391B-AA45N The Allen-Bradley 1391B-AA45N AC Servo Controller has a 38A RMS Input Circuit Breaker Rating and a 1300A Circuit Break...
Available Now
1391B-ESAA15 The Allen-Bradley 1391B-ESAA15 AC Servo Controller has a 10 kW Peak Power Output and a 17A RMS Input Circuit Breaker ...
Available Now
1391B-ESAA15-AQB The Allen-Bradley 1391B-ESAA15-AQB AC Servo Controller has a 10 kW Peak Power Output and a 17A RMS Input Circuit ...
Available Now
1391B-ESAA22 The Allen-Bradley 1391B-ESAA22 AC Servo Controller has a 15 kW Peak Power Output and a 26A RMS Input Circuit Breaker ...
Available Now
1391B-ESAA22-AQB The Allen-Bradley 1391B-ESAA22-AQB AC Servo Controller has a 15 kW Peak Power Output and a 26A RMS Input Circuit ...
Available Now
1391B-ESAA45 The Allen-Bradley 1391B-ESAA45 AC Servo Controller has a 30 kW Peak Power Output and a 38A RMS Input Circuit Breaker ...
Available Now
1391B-ESAA45-AQB The Allen-Bradley 1391B-ESAA45-AQB AC Servo Controller has a 30 kW Peak Power Output and a 38A RMS Input Circuit ...
In Stock
1391B-ESAZ45-AQBAB-SERVO CONTROL 45 AMP AC Servo Controller
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1391B-EST45 The Allen-Bradley 1391B-EST45 AC Servo Controller has a 45 kW Peak Power Output and a 38A RMS Input Circuit Breaker Ra...
Available Now
AC Servo 1391 Description Stock Level