• PTC resistive soft-start technology eliminates nuisance tripping of fuses or breakers
• Six power supply options for optimal configuration of single and multi-axis systems
• Up to four drive axes can be used with one PA power supply, up to six with PA-LM logic-only power supply
• Separate inputs for logic and bus voltages allow communications to drive without the bus power applied (PA14, PA28, PA50, PA75 and PA85 models)

 Power Supply Sizing:

For drives operating from a separate power supply, the supply power output rating must equal or exceed the combined average power of all drives operating simultaneously. The average power of an individual drive amplifier is based on the power calculation of the A RMS torque and speed requirements for all “motoring” motion segments.

Power (Watts) = N (RPM) T / C (see table for unit definitions)

Considering motor and drive losses, as a general rule, for permanent magnet servos 1 kW of input power is needed for every 750 Watts of output power from the motor. This simple rule is not valid when running the motor at or near zero speed however. In this case I^2R losses may be a large percentage of the total input power, thus decreasing efficiency. Use our MOTIONEERING® application sizing and selection software to precisely calculate power supply sizing requirements.

PA Series Power Supplies