Allen Bradley 1326AB-B740C-21

The 1326AB-B740C-21 servo motor from the Allen-Bradley 1326AB Torque Plus series is a 2200 RPM servo motor designed to operate at 460 or 380 Volts AC. Features available on 1326AB servo motors like this one include absolute encoder or resolver-based feedback, an IP 67 level of protection, high-voltage windings, an advanced magnet design, a sinusoidal 4-pole design offering high torque at high speeds, and smart motor options for simple commissioning. With a 194-millimeter frame diameter, the 1326AB-B740C-21 servo motor is capable of delivering 2200 RPM at 460 Volts AC and 1800 RPM at 380 Volts AC. The magnet stack length and bolt center measurement for the servo motor are 40 millimeters and 215 millimeters, respectively. The servo motor comes with the resolver-based feedback option and the IEC 72-1 metric flange with a keyway.

Performance specifications for the 1326AB-B740C-21 servo motor include 8.7 kilowatts of output, 469 pounds on an inch of rated torque, and 0.29 lb-in-s2 of rotor inertia. When used in conjunction with an Allen-Bradley AM75 axis module, the motor has 1122 pounds on an inch of peak stall torque and 50 Amps of peak stall current. When used in conjunction with an AM50 axis module, the motor has 745 pounds on an inch of peak stall torque and 33.2 Amps of peak stall current. The mechanical time constant is 6.1 milliseconds and the electrical time constant is 14.3 milliseconds. Thermal specifications for the 1326AB-B740C-21 servo motor include 104 degrees Fahrenheit of recommended maximum ambient temperature, an H insulation class, and a 60-minute thermal time constant. The motor weighs approximately 170 pounds. Specifications for the winding on the motor include 11.35 millihenry inductance, 0.61 Ohms of terminal resistance, 193.1 Volts / 1000 RPM voltage constant, and 26.4 pounds on an inch/Amp torque constant. To prevent injury and equipment damage, the servo motor’s brake should not be energized more than 90 times per hour when it is used as a parking brake.