PLC PN-173123 Inverter Circuit Board

Frequently asked questions
Q:What is the PLC PN-173123?
A:The PN-173123 is an internal inverter printed circuit board (PCB) used in compatible PLC industrial drive equipment. It serves as a replacement electronic assembly during equipment maintenance.

Q:Is the PN-173123 a complete drive?
A:No. The PN-173123 is an internal circuit board rather than a complete variable frequency drive. It is installed inside compatible equipment as one of the electronic assemblies.

Q:Where is the PN-173123 installed?
A:The board is installed inside a compatible PLC drive and is connected to other internal assemblies as part of the drive electronics.

Description

The PLC PN-173123 is an inverter circuit board used as a replacement component in compatible industrial drive systems. It forms part of the internal electronic assembly responsible for signal processing and communication between the control section and the power stage of the drive. Installed inside the drive enclosure, the PN-173123 works together with associated control boards and power modules to support normal inverter operation. As an internal PCB assembly, it is intended for maintenance and replacement of existing equipment rather than external installation. The PN-173123 is commonly supplied as a spare part for repairing compatible PLC drive systems. Replacing a damaged board with the correct part number helps restore normal equipment operation while maintaining compatibility with the original hardware configuration.

Parameter

Model: PN-173123 Inverter Circuit Board
Typical Power Range: 75 kW thyristor-based drive systems
Main DC Output: 24 VDC (for core control circuits)
Power Conversion: AC-to-DC rectification with multi-channel isolated output
Total Output Power: ≤ 150 W
Auxiliary DC Outputs: 15 VDC / ±12 VDC (for sensors, logic, and gate drives)

Application areas

The PN-173123 is an industrial inverter/gate trigger circuit board utilized within high-power PowerFlex variable frequency drive (VFD) systems, its primary application areas include:

• Industrial Motor Speed Regulation: Integrated into the power architecture of heavy-duty PowerFlex 753 and PowerFlex 755 drives to regulate motor speed, torque, and acceleration curves.
• High-Power Inverter Section Switching: Functions as the dedicated gate drive and firing circuitry required to cleanly switch thyristor (SCR) power electronics within industrial power sections.
• Heavy Industrial Duty Resiliency: Built to withstand high electromagnetic interference (EMI) and electrical noise commonly generated by large-scale variable frequency motor control centers.

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