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SC935NN-001-01 Pacific Scientific

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Internal Product Review

The SC935NN-001-01 is a Pacific Scientific SC900 servo drive with convection cooling and 97% power stage efficiency. Support for analog, incremental digital, or serial command and RS-232/485 communications gives the drive strong integration flexibility in coordinated motion systems. Peak output power to 18.0 kW highlights the unit’s capability in demanding servo applications.

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Product Description:

Pacific Scientific manufactures the SC935NN-001-01 as part of its SC900 Servo Drives series. This servo drive works as the power and control stage for a matched brushless motor, regulating current and velocity so the axis can follow commanded motion with stable response. It is intended for automated assembly, packaging, and material-handling equipment where repeatable starts, stops, and speed changes are required. The unit is offered as a standard model and operates from a 240 VAC three-phase supply.

The command interface accepts analog, incremental digital, or serial commands, while built-in communications use RS-232/485 serial links for setup and real-time diagnostics. With external forced-air cooling at ambient temperatures up to 50 °C, the power section can supply a continuous output of 30.0 A, which corresponds to 9.0 kW when the incoming line is 240 V three phase. For rapid acceleration or transient load events, the drive can deliver up to 60.0 A peak current for short intervals. This output allows the amplifier to support brief overload demand without interrupting normal closed-loop motion. IGBT switching and current-mode regulation help maintain phase balance and reduce torque ripple during operation.

The drive can accommodate motor windings from 0.5 H down to 0.5 mH, allowing it to work with both high-inductance torque motors and low-inductance high-speed servo motors. The housing does not use an internal fan, so heat is removed through the convection-cooled enclosure with the aid of cabinet airflow around the chassis. Even under that cooling arrangement, the power stage operates at 97% efficiency, which helps limit heat loss inside the cabinet and reduce wasted input power. Its peak power capacity reaches 18.0 kW for brief overload demand during acceleration and other short high-load events. This operating range gives the drive flexibility when paired with motors that have different electrical characteristics and duty cycles.

Command Interface
Analog, Incremental Digital, or Serial Command
Communications
RS-232/485 Serial
Continuous Output Current (50°C Forced Air)
30.0 A
Continuous Output Power(240V 3ph 50°C Forced Air)
9.0 kW
Cooling Type
No fan, convection cooled
Firmware Type
Standard
Maximum Motor Inductance (l-l)
0.5 H
Minimum Motor Inductance (l-l)
0.5 mH
Peak Output Current (0-p)
60.0 A
Peak Output Power @ 240 VAC
18.0 kW
Power Stage Efficiency
97%
Product Family
SC900 Servo Drive
Software Type
Base Servo Software
Unit Type
Standard Unit

Frequently Asked Questions about SC935NN-001-01:

Q: What types of command interfaces are supported by the SC935NN-001-01?

A: The SC935NN-001-01 servo drive can be controlled via analog, incremental digital, or serial command interfaces.

Q: What communication protocols does the SC935NN-001-01 support?

A: This unit offers RS-232/485 serial communication for reliable connectivity with control systems.

Q: What is the continuous output power of the SC935NN-001-01 at 240V 3-phase?

A: With forced air cooling at 50°C, it delivers a continuous output power of 9.0 kW.

Q: How is the SC935NN-001-01 servo drive cooled?

A: The SC935NN-001-01 operates without a fan, relying on convection cooling.

Q: What is the power stage efficiency of the SC935NN-001-01?

A: This drive achieves a power stage efficiency of 97%, ensuring minimal energy losses during operation.

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