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Description

The PDU receives 3-phase 380–480 VAC input and distributes power to the test bench’s DC power supplies and amplifiers. It provides DC protection, monitoring, 24 V control power for the main contactor and bus bar boxes, and 12 V auxiliary power for amplifier control circuits. The PDU integrates with the E-Stop Module for safe Start/Stop operation and emergency shutdown.

It also features three DC chopper circuits to dissipate excess energy on power resistors in case of DC bus overvoltage.

Front Panel LED Indicators

• AC MAINS – AC input status

• 24 VDC ON – 24 V control power status

• DC BUS ON – DC bus active status

• CHOPPER ON – DC chopper operation status

PDU Features

• Main Power Terminals (L1, L2, L3, GND): Rated up to 60 A for the 3-phase AC input.

• AC_OUT Connectors: Supply AC power to the Itech DC power supplies (see Note 1).

• DC_IN Connectors: Accept DC power from the DC power supplies (see Note 1).

• DC_OUT Connectors: Distribute DC power to the OP8110 amplifiers (see Note 1).

• AUX Connectors: Provide 12 VDC auxiliary power to the OP8110 amplifiers.

• P1 Connector: Interface to the E-Stop module for Start/Stop and emergency shutdown.

• Internal AC Supply: 100–240 VAC entry module powers the internal 12 V and 24 V power supplies.

• Maximum Rated Voltage: 500 V to ground.

Note 1: The PDU supports power distribution to up to three ITECH DC power supplies and can deliver the corresponding DC output to up to three OP8110-6 amplifiers.

Simplified Schematic Diagram

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