The Allen-Bradley 1326AS-B330H-21-K3 Low Inertia Brushless Servo Motor is a high-performance AC motor designed for use with the Allen-Bradley 1394 motion system. It features a resolver-based system, offering low inertia, high acceleration, and impressive peak torque suited for most industrial applications. The motor’s neodymium-iron-boron rotors provide a high torque-to-inertia ratio, and it is housed in a TENV-class enclosure with an IP65 rating, making it suitable for harsh environments.
Key specifications include an AC input voltage of 460 Volts, a motor power of 0.9 kW, a stall current of 2.1 Amps (peaking at 6.0 Amps), and a rotor speed of 5370 RPM at 380 Volts (maximum 6500 RPM at 460 Volts AC). The motor's inertia is rated at 0.00009 Kg-m² (0.0008 lb-in-sec²).
The 1326AS-B330H-21-K3 provides continuous stall torque of 2.1 N-m (18 lb-in) with a peak torque of 5.6 N-m (50 lb-in). It has a winding torque constant of 1.04 N-m (9.2 lb-in) at 25°C. The motor also includes a 1.3-milliseconds mechanical time constant, a 2.34-milliseconds electrical time constant, and a thermal constant of 21 minutes, utilizing Class B thermal insulation.
For thermal protection, the motor features a 2.5-Amp normally closed thermal switch. It includes a robust resolver for precise position feedback, generating 1024 pulses per revolution (4096 counts per revolution) in an A Quad B encoder output. Additionally, it offers a holding brake option with a torque of 2.26 N-m (20 lb-in) and a 24V DC coil.
Constructed with an extruded aluminum housing for efficient heat dissipation, the motor has a 75 mm frame diameter and a 30 mm stack length, with an IEC-rated flange and key for versatile vertical mounting. It operates within a temperature range of 0 to 40°C (32 to 104°F) and can be stored in temperatures from -30 to 70°C (-22 to 158°F), with a relative humidity range of 5 to 95% non-condensing.
The motor weighs approximately 4.3 kg and has shipping dimensions of 93 x 246 x 89 mm. It meets CE and UL certification standards.
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