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Source Mode Operation

5.17 Polyphase Function

The IT7900P series power supplies implement the frequency-locked and phase-

locked function between power supplies through the digital IO interface or

System bus interface, which achieve 6 phase& 12 phase power output.

This power supply provides two ways to achieve multi-phase functionality:

⚫ One is to connect the System bus interface between instruments directly

through fiber optic cable, no other connection is needed, the wiring is simple

and convenient, this wiring method requires customers to purchase fiber

optic module and fiber optic cable separately.

⚫ The other is via a digital IO interface, which requires no additional

accessories and the instrument is connected by default.

Take the simulated 6-phase power supply as an example, and introduce the

multi-phase function application method.

5.17.1 Connecting the DUT

When two IT7900P power supplies are combined in multiple phases, the outputs

ABC are connected separately and the N wires of the two IT7900P power

supplies need to be connected together as six-phase N wire terminals. The

wiring schematic is shown below.

5.17.2 Connecting the System Bus Method

The two IT7900P power supplies are connected via the outer ring interfaces TX

and RX in the System bus. Fiber optic connection method customers need to

purchase fiber optic modules and fiber cables.

Connect the System Bus as shown in the diagram below for fiber optic

communication between instruments.

1. Insert the fiber optic module into the hole corresponding to TX RX.

ITech IT7900P Series User Manual

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