Allen-Bradley 1391-T050DT AC Servo Controller

The Allen-Bradley 1391-T050DT has a 240/480V AC Primary Voltage, 3 Phases, and a 60 Hz Frequency. It also contains a 230V AC Single-Phase C.T. Windings Secondary Voltage.

The Allen - Bradley 1391B-ES controllers come in current ratings of 15, 22.5, and 45 Amps. A complete servo system consists of a 1391B - ES controller, a 1391 transformer, a 1326 servo motor, and 1326 cables.

The 1391-T050DT isolation transformer is rated at 5.0 kVA. Its primary voltage ranges from 240 to 480 Volts AC, with a 3 - phase input and a supported line frequency of 60 Hertz. The secondary voltage is 3 - phase 230 Volts AC, and it also includes four single - phase windings rated at 36 Volts AC. The 36 Volts AC output of the transformer is used to power the logic control board on the 1391B-ES controller. Specifically, the 36 Volts AC leads are connected to terminals 19 and 21 on Terminal Block 4 of the controller, while the center tap is connected to terminal 20 of Terminal Block 4.

Technical specifications for 1391-T050DT

Manufacturer Rockwell Automation

Brand Allen-Bradley

Part Number/Catalog No. 1391-T050DT

Product Type Isolation Transformer

kVA Rating 5

Primary Voltage 240/480V AC

Phase 3

Frequency 60 Hz

Secondary Voltage 230V AC Single-Phase C.T. Windings

use with Allen-Bradley 1391B-ES servo controllers. To ensure that the UL listing of the 1391B - ES controllers remains valid, users must supply power to these controllers from an Allen - Bradley 1391 isolation transformer. Using other types of transformers will invalidate the UL listing.

Regarding power dissipation, the 1391-T050DT isolation transformer has values of 50, 100, 150, 200, and 250 Watts at 20, 40, 60, 80, and 100% of its rated output respectively.

This isolation transformer weighs 100 pounds and has dimensions of 11 x 14 x 11 inches. The ambient air temperature around the 1391-T050DT isolation transformer needs to be maintained between 0 and 60 degrees Celsius, and the relative humidity should be kept within the range of 5 to 95% (non - condensing).