DSC 3.1-150-115V

The DSC 3.1-150-115V is a servo amplifier manufactured by Bosch Rexroth Indramat for the DSC Servo Amplifiers series. As a power interface between motion controllers and servomotors, it converts power from a regulated DC link into controlled phase current so automated machinery can execute precise torque, speed, or positioning commands on packaging lines, gantry axes, and other industrial drives. The unit also manages regenerative energy and sensor feedback to maintain stable operation across a wide duty range.

Continuous motor demand is supported by an output current of 75 A from a nominal bus of 300 VDC, providing steady power to the connected axis. For brief overloads, the amplifier supplies 130 A and raises shaft power to 39 kW before protective timing limits the output to prevent damage to power components. The control circuitry draws 180 VA, which keeps auxiliary power requirements low. Regenerative braking energy is routed to an internal bleeder that dissipates 500 W on average and up to 20 kW during rapid stops, while total thermal losses are limited to 510 W. Current sensing uses an Imess scale factor of 50 mV/A. Velocity feedback is accepted through a ±10 VDC tachometer or 0/5 V TTL encoder signals, allowing the use of analog or digital speed loops.

Thermal safeguards shut down the drive when the ambient temperature reaches 55 °C, the heat sink temperature rises above 85 °C, or the motor’s stator sensor reports 105 °C. These limits correspond with the dissipation ceiling and help prevent insulation damage. Operation is rated at altitudes up to 1000 m, beyond which derating is necessary because lower air density reduces cooling performance. The 26 kg housing bolts to a backplane for secure cabinet installation. A finned baseplate transfers heat into the surrounding cabinet airflow, which must be sufficient to carry the generated heat away from the amplifier.