P315-L Danaher
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The Danaher P315-L is a 2-phase bipolar MOSFET chopper drive in the API Servo Drives series. It accepts an AC input voltage between 90 and 135 VAC and supports a maximum output current of 6.2 Amps per phase. The P315-L features a 20 kHz fixed chopper frequency and an overtemperature trip at 140 degrees Fahrenheit.
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Product Description:
The P315-L is a two-phase bipolar MOSFET chopper drive produced by Danaher within the API Servo Drives series. It converts fixed AC power and low-level logic commands into controlled motor current so that stepper axes in pick-and-place stations, labeling heads, or indexing tables can be positioned accurately and repeatably in industrial automation. The DB-25 command connector draws only 15 mA, allowing most PLC high-speed outputs to drive it directly without an intermediate interface.
The drive accepts a nominal single-phase supply ranging from 90 VAC to 135 VAC, providing flexibility when cabinet transformers deliver different line voltages. Inside the unit, a fixed chopping frequency of 20 kHz modulates the two half-bridges; this ultrasonic rate minimizes audible noise while keeping current ripple low. Programmable phase current ranges from 6.2 A per phase down to 0.2 A per phase, allowing the output to be matched to the connected motor. For thermal relief during dwell periods, the automatic current reduction feature cuts the commanded value to 50% after the motor becomes idle, lowering heat generation while retaining holding torque. Fault signaling uses an open-collector output with a current capacity of 60 mA for connection to common control circuits.
A dedicated logic rail of +5 VDC powers the optically isolated inputs, and the host control supply must provide at least 100 mA. Pulse command capability extends to 1 MHz when the incoming edge width exceeds 0.5 µs, enabling fine microstep resolution at high shaft speeds. If the internal heat sink reaches 140 °F (60 °C), the overtemperature circuit trips, initiates a controlled shutdown, and activates the fault line. The fault output supports control voltages from 5 VDC through 24 VDC, allowing it to work with 12 V systems and industrial field I/O blocks. These electrical interfaces separate the low-voltage command path from the motor power stage, helping protect connected control equipment from switching noise. The automatic shutdown response prevents continued operation after the drive exceeds its permitted internal temperature.
