Description
Product Overview
The Pacific Scientific PMA240-1150B-02 is a brushless servo motor in the PMA series, designed for closed-loop motion control in industrial machinery. It converts electrical energy from a compatible servo drive into controlled rotary motion for positioning, indexing, and speed-regulated applications. The motor has a 70 mm square frame and a stack-length code of 4. Its compact mounting footprint can be useful in automated machinery where space, acceleration response, and repeatable shaft positioning must be considered together.
This configuration includes a 24 V holding brake and a keyed shaft. The brake is intended to hold the shaft when properly applied; it should not be treated as a dynamic stopping brake unless the manufacturer’s documentation explicitly permits that duty. The keyed shaft provides a positive mechanical interface for a compatible coupling or pulley. Product references report continuous stall torque of 2.6 Nm and peak torque of 9.6 Nm, but actual usable torque depends on speed, drive current limits, thermal conditions, and duty cycle.
For maintenance and procurement teams, the Pacific Scientific PMA240-1150B-02 should be matched to the installed drive and feedback system before a replacement is approved. Confirm the motor winding, sensor type, connector pinout, brake voltage, shaft dimensions, and mounting pattern. The model is listed as an older or obsolete product by some suppliers, so availability and condition may vary. Do not assume that a motor with the same frame size or a similar PMA designation is electrically interchangeable. Confirm actual condition with supplier and request nameplate photographs and functional-test records when sourcing used or refurbished stock.
Product Introduction
The Pacific Scientific PMA240-1150B-02 is a brushless servo motor for industrial motion-control systems. It features a 70 mm frame, a keyed shaft, an installed sensor, and a 24 V holding brake.
It is intended for use with a compatible servo drive and feedback configuration. Before replacing an existing motor, verify electrical ratings, sensor compatibility, connector wiring, mounting dimensions, and brake requirements against the original equipment documentation.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Pacific Scientific |
| Model | PMA240-1150B-02 |
| Product type | Brushless servo motor |
| Series | PMA |
| Frame size | 70 mm square |
| Stack length | 4 |
| Winding | Factory-assigned; verify motor nameplate and datasheet |
| Continuous stall torque | 2.6 Nm, reported |
| Peak torque | 9.6 Nm, reported |
| Holding brake | Yes |
| Brake voltage | 24 V |
| Shaft configuration | Closed keyway, key fitted |
| Shaft standard | DIN 42955 N listed in some product references; verify exact shaft specification |
| Feedback sensor | Installed; exact sensor type unverified |
| Connectors | 6PP power / 17PSO feedback, as listed |
| Rotor inertia | Approximately (0.072 \times 10^{-3}\ kg·m^2), reported |
| Weight | Approximately 3.5 kg |
| Rated speed | Not verified for this exact configuration |
| Supply voltage | Verify the winding and compatible drive documentation |
| Protection rating | Not verified |
| Installation | Flange mounting; confirm dimensional drawing |
| Condition | Confirm actual condition with supplier |
Specifications are based on available product references rather than a verified manufacturer datasheet for the exact unit. Confirm torque-speed curves, winding ratings, feedback type, and brake details before engineering approval.
PMA240-1150B-02
Related Products
The following models are related Pacific Scientific PMA brushless servo motors. They are comparison candidates only, not confirmed direct replacements.
| Model | Description |
|---|---|
| PMA240-1150B-02 | Target motor; 70 mm frame, keyed shaft, 24 V brake. |
| PMA23B-00114-00 | PMA-series brushless servo motor with a 70 mm frame. |
| PMA23C-01100-00 | PMA-series brushless servo motor with a 70 mm frame and 24 V brake listed. |
| PMA24C-00100-00 | PMA-series motor with a different winding specification. |
| PMA24D-00100-00 | PMA-series motor variant with a different winding designation. |
Before substituting another motor, compare the drive’s supported motor data, torque-speed characteristics, encoder or sensor interface, shaft and flange dimensions, and brake requirements.
Frequently Asked Questions
Q1: Can the PMA240-1150B-02 be hot-swapped?
Do not assume hot-swap capability. Isolate the servo drive and follow the machine’s lockout and stored-energy procedures before disconnecting motor power, feedback, or brake wiring.
Q2: Does this motor require specific drive parameters?
Yes. The compatible drive must support the motor’s winding, feedback device, current requirements, and control mode. Load the correct motor data and verify feedback polarity and commutation according to the drive manufacturer’s commissioning procedure.
Q3: Is the holding brake rated at 24 V?
Available references identify a 24 V brake. Confirm the brake’s rated voltage, current, wiring, and release behavior from the exact motor documentation. Do not use the brake for repeated dynamic stopping unless its specifications permit it.
Q4: Can another 70 mm servo motor replace it?
Not based on frame size alone. A replacement must match or be engineered for the winding, torque and speed requirements, feedback interface, shaft geometry, mounting pattern, and brake function.
Q5: Could replacing the motor affect machine position or stored parameters?
Yes. A motor replacement can require drive configuration checks, feedback verification, and machine homing or position-reference procedures. Preserve the original drive parameters and validate the axis before returning it to production.
Q6: How can condition and authenticity be checked?
Request clear nameplate photographs, the complete model code, connector and shaft photographs, and any available inspection or test report. Confirm whether the unit is new, used, repaired, or refurbished; the part number alone does not establish its condition.
Q7: What should be inspected before installation?
Check shaft keyway condition, bearings, flange and mounting surfaces, connector pins, feedback wiring, brake operation, and insulation according to the applicable service procedure. Investigate shaft play, abnormal noise, or inconsistent feedback before installing the motor on a production-critical axis.
