Product Description:

The PMB31D-10116-02 is a brushless servomotor manufactured by Pacific Scientific for the PMB Brushless Servomotors series. It converts controlled drive current into commanded rotary motion, permitting accurate positioning of indexing tables, pick-and-place axes, and packaging rollers in distributed automation systems. The design combines permanent magnets, electronic commutation, and a compact housing so that the motor can be mounted close to the load and driven by a matched servo amplifier through its integrated feedback channel. This arrangement shortens mechanical linkages and improves dynamic response in high-cycle production equipment.

With a frame coded as NEMA Size 34, the motor measures 3.4 inches square across the mounting face, enabling direct replacement of stepper motors that share its bolt circle. A nominal stall requirement of 5.4 ARMS at the specified bus voltage is the continuous current the drive must supply without exceeding temperature limits. Position feedback is provided by a 4096 ppr incremental encoder, giving 12-bit resolution for fine velocity and position loops. Connection to the machine harness is made through flying leads with AMP connectors, so crimped plugs can be installed on-site without opening the motor housing. The integrated sensor is a digital encoder with commutation, which delivers incremental channels and six Hall signals to simplify alignment during power-up.

Overtemperature protection is supplied by a built-in PTC Thermistor, allowing the controller to inhibit current if winding heat rises beyond its calibrated threshold. The output shaft has a round profile, making it compatible with clamp-style couplings and timing-belt pulleys that do not require keyways. A stack length multiple of 1 indicates that this unit uses the shortest magnetic stack in the family. When operated from a 240 VAC bus, that short stack helps keep inertia low for fast acceleration.