P315MH422 Danaher
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The Danaher P315MH422 servo drive is part of the API Servo Drives series and features a 2-phase bipolar constant current drive topology with a chopper frequency of 20 kHz. It supports a maximum phase current of 8.2 amps per phase and provides a static torque of 2400 oz-in. The drive achieves a resolution up to 50,800 steps per revolution and can handle step pulse rates up to 1 MHz.
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Product Description:
The P315MH422 is a microstepping drive with an integral two-phase stepper motor manufactured by Danaher for the API Servo Drives series. It converts step-and-direction pulses from a motion controller into precisely regulated phase currents, allowing the motor shaft to index or position loads without mechanical gearing. The assembly combines the motor’s mechanical envelope with the driver electronics so that cabinet wiring is reduced and machine builders can mount a single unit on gantries, pick-and-place axes, or indexing tables in automated equipment.
Its current regulation loop switches at 20 kHz, a frequency high enough to push switching noise above the audible band while keeping current ripple low. The drive can deliver up to 8.2 A/phase, providing the headroom required for rapid acceleration. Microstepping granularity reaches 50,800 steps/rev, enabling smooth rotary motion and finer linear resolution when paired with leadscrews or belts. The pulse interface accepts command rates to 1 MHz, so even small step angles can be driven at high speed, and each pulse only needs a minimum width of 0.5 µs for reliable recognition by the logic input circuit.
At low torque settings the phase current can be reduced to 2.0 A/phase, limiting heat generation during dwell periods. The motor’s holding ability is characterized by a static torque of 2400 oz-in, allowing vertical or high-inertia loads to remain fixed when motion is stopped. Thermal protection engages if the internal sensor detects 140°F, preventing coil insulation damage. Control electronics are powered from a dedicated +5 VDC logic rail, isolating signal processing from the higher motor voltages. Additional power-saving features lower the drive current to 50% after a 1 s delay, which minimizes energy consumption when the axis is idle.
