DSC 3.1-100-115V

The DSC 3.1-100-115V is a servo amplifier produced by Bosch Rexroth Indramat as part of the DSC Servo Amplifiers series. It supplies controlled motor current for industrial axes that demand rapid torque changes, linking a 115 VAC control supply with the common DC bus of multi-axis drive racks. By modulating its transistor bridge, the unit supports high-power positioning and process drives found in packaging lines, material-handling gantries, and printing equipment.

The power stage is energized by a control voltage of 115 VAC and operates from a DC bus held at 300 VDC ±15%. Under continuous duty, the amplifier delivers a nominal output of 70 A, while momentary overloads can reach 100 A and produce up to 30 kW of mechanical output, enabling acceleration of heavy loads without undersizing the motor. Average bleeder dissipation is 500 W, but the internal resistor can absorb regenerative peaks of 20 kW so the shared bus remains within limits during fast deceleration. Overall power consumption for logic and gate drives is 180 VA, and worst-case thermal loss inside the cabinet is limited to 470 W. A current-monitoring scale factor of 75 mV/A is provided through the test jack, allowing phase current to be checked with a standard voltmeter.

The amplifier is housed in an enclosure rated IP54, which resists airborne dust and tolerates ambient temperatures up to 40 °C. Internal components remain safe until the absolute maximum temperature of 55 °C is reached. Forced-air channels require a minimum clearance of 80 mm above and below the heat sink, and reliable operation is permitted at altitudes up to 1000 m without derating. The unit weighs 26 kg, so panel mounting should account for its mass as well as the peak bleeder load when sizing supports.