SC904T1-001-01

SC904T1-001-01 is a Pacific Scientific standard unit in the SC900 Servo Drives series. Its command interface accepts analog or incremental digital signals for motion control. It has no separate communications interface, so setup is performed through the analog or incremental digital connection. The PWM frequency is 20 kHz, supporting controlled power delivery to the motor.

The drive provides 15 A of continuous output current, including 15.0 A under 25ºC convection conditions. Continuous output power is 4.5 kW, including 4.5 kW at 240 V three-phase input and 25ºC convection. Peak output current is 30 A from zero to peak, and peak output power is 9 kW at 240 VAC, providing short-duration capacity for acceleration and transient loads. The nominal DC bus voltage is 320 VDC, while the power stage operates at 97% efficiency.

The supported line-to-line motor inductance ranges from a minimum of 1.0 mH to a maximum of 1 H; the separate minimum and maximum motor-inductance ratings are also 1.0 mH and 1 H. Motor cables can be up to 50 m long, allowing separation between the drive and motor. The integrated shunt regulator handles 125 W continuously and 12 kW at peak to dissipate regenerative energy.

Cooling is provided by a 120 VAC fan, and the cooling-fan supply requires 120 VAC at 60 Hz. This forced-air cooling removes heat generated during operation.