Product Description:

The 403 is a DC servo amplifier built by Copley Controls for the DC Servo Amplifiers series. Acting as a power interface, it modulates a direct-current bus in response to command inputs so that a DC servo motor receives precisely regulated current. This function enables motion controllers to attain repeatable speed and position in pick-and-place modules, conveyor indexing tables, and other automated machinery that depends on tight servo loops. Because the device integrates easily on low-voltage supply rails and offers feedback monitoring, it simplifies panel integration where multiple axes share the same control architecture.

Its continuous armature current of ±5 A supports sustained mechanical loads without derating, and this current provides a continuous electrical output of 250 W at the rated bus voltage. When the application demands rapid acceleration, the output stage can reach ±50 V. The voltage is synthesized by a carrier that switches at 25 kHz to minimize ripple and audible noise. A closed-loop bandwidth of 2.5 kHz lets the amplifier correct current errors within microseconds, so position controllers can maintain accuracy during fast reversals and load disturbances.

For short bursts, the power section supplies up to ±10 A, providing momentary output peaks of up to 500 W for high-inertia starts. The electronics accept unregulated supplies from 18 V to 55 VDC, allowing the same module to operate from battery stacks or shared DC links. An onboard sensor forces a shutdown at 70 °C, protecting the MOSFETs before their thermal limits are exceeded. Startup is delayed by 50 ms so the logic rails can stabilize, and a 2 A/V current-monitor pin supports oscilloscope diagnostics. Digital inputs recognize a high state above 2.5 V and a low state below 1.0 V. The 3.27 × 4.75 × 1.28 in footprint and 0.52 lb mass minimize enclosure space and weight.