SC722A-001-PM72036 Pacific Scientific
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The SC722A-001-PM72036 is a servo controller produced by Pacific Scientific and belongs to the SC720 Command Controllers series. It features a continuous output current of 3.8 A and a peak output current of 7.5 A, with continuous rated torque of 43 lb-in and a peak stall torque of 84 lb-in. The controller supports analog command input, uses a torque/velocity control type, and weighs 13 lbs.
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Product Description:
The SC722A-001-PM72036 belongs to the SC720 Command Controllers series produced by Pacific Scientific. As a torque and velocity controller, it regulates three-phase servo motors in closed-loop automation cells and converts analog reference signals into controlled armature current. Within an industrial motion system, it balances torque and velocity so that axes track set points with positional accuracy suitable for packaging, material handling, and similar motion tasks.
This controller accepts an analog command, and the input channel presents 50 kΩ impedance to the sourcing device, minimizing loading on PLC or sensor outputs. Inside the unit, a resolver-based encoder emulator supplies 1024 ppr feedback to the drive for commutation and error monitoring. Continuous operation is supported at 3.8 A armature current, producing 43 lb-in of rated torque when paired with the recommended motor. A high-frequency current loop works against the winding’s 69.0 mH line-to-line inductance to stabilize flux, while proportional control keeps accuracy within ±22 arcmin.
During peak transients, the controller can deliver 7.5 A and drive a motor to the 84 lb-in stall limit without losing stability. On a 240 Vac three-phase supply, its continuous power reaches 1.1 kW, while bursts up to 2.2 kW cover acceleration. Pulse-width modulation runs at 20 kHz, reducing noise and improving current resolution at the rated speed of 1000 rpm. Complementary metrics include a 12-bit RDC channel for position conversion, a motor inertia match point of 1.55 × 10⁻³ kg·m², and a weight of 13 lbs. The unit is cataloged within the 720 Series product group, and its encoder emulator supplies quadrature lines to simplify retrofit work. It can also close torque and velocity loops while sending discrete fault information to higher-level logic during operation.
Frequently Asked Questions about SC722A-001-PM72036:
Q: What is the positional accuracy specification of the SC722A-001-PM72036 controller?
A: The SC722A-001-PM72036 achieves a positional accuracy of ±22 arcminutes for precise motion control applications.
Q: What is the continuous output current provided by the SC722A-001-PM72036?
A: This model has a continuous output current rating of 3.8 A for stable and consistent operation.
Q: What is the peak stall torque of the SC722A-001-PM72036 controller?
A: The controller offers a peak stall torque of 84 lb-in, enabling it to handle demanding applications that require high torque for short periods.
Q: What type of command input does the SC722A-001-PM72036 accept?
A: The input command type for this unit is analog, supporting flexible integration with analog control systems.
Q: What is the continuous output power of the SC722A-001-PM72036 at 240 Vac, 3-phase?
A: This controller outputs a continuous power of 1.1 kW when operating at 240 Vac with a 3-phase supply.
