ABB YT204001-KA/5 YPQ201A Main CPU Control Board

Product Description

YT204001-KA/5, designated type YPQ201A, is ABB legacy rack-mounted master processor board, widely deployed in older medium/high power drive systems and industrial automation control racks.

It executes core control algorithms, processes field I/O signals, communicates with auxiliary boards via backplane bus, and manages system monitoring, fault diagnosis and protection logic. 

Equipped with multi-channel parallel backplane connectors, on-board power conversion circuit and memory chips, conformal coated PCB to resist dust, humidity and vibration. 

It is an obsolete critical replacement spare for paper, metallurgy and power plant ABB drive control cabinets.

Technical Specifications

Model: YT204001-KA/5, Type Code: YPQ201A

Brand: ABB, Origin: Sweden

Function: Main CPU & System Control Logic Board

Power Supply: Powered via rack backplane DC bus

Backplane Interface: Multi-way standard parallel slot connectors

Onboard Circuit: Integrated DC-DC power module, EPROM firmware storage, signal conditioning circuit

Supported System: ABB legacy modular drive control rack series

Operating Temperature: 0℃ ~ +55℃ full load

Storage Temperature: -40℃ ~ +70℃

Humidity: 5%–95% non-condensing, conformal coated PCB

Protection Class: IP20, cabinet internal rack installation only

Mounting: Standard plug-in slot installation inside control rack

Dimension: Approx. 305 × 255 × 30 mm

Net Weight: Approx. 0.7kg

Certifications: CE, industrial EMC compliance

Key Features

Central master control unit, undertakes main operation logic, speed regulation and protection sequence for the whole drive system.

Built-in firmware storage area, supports program parameter storage and system startup operation.

High-speed backplane parallel bus realizes real-time data exchange with I/O boards, signal acquisition boards and power interface boards.

Comprehensive hardware fault detection circuit, monitors board power, communication and signal abnormalities and outputs fault alarm signals.

Industrial anti-vibration PCB layout and anti-corrosion coating, adapts to continuous running heavy industry control room environments.

Direct one-to-one replacement for same revision YT204001-KA series boards; revision suffix /5 indicates hardware version variant.

Mature classic hardware platform, widely matched with ABB large DC drives and older AC drive control systems.

Complete multi-layer protection logic including overcurrent, overvoltage, overheat interlock to safeguard power unit and motor equipment.