ABB CPU01+CPM01

1. Product Overview

The ABB CPU01+CPM01 1KHL160038R0004G is a modular combined product of the ABB AC 500 PLC series. This assembly consists of two core modules with independent functions:

• CPU01: Central Processing Unit module, responsible for system logical operation and program execution, undertaking the core control work of the entire PLC system.
• CPM01: Communication Processor Module, designed to build CS31 bus networks and realize high-speed data exchange between the CPU and remote I/O stations.

2. Technical Parameters

2.1 CPM01 Module Parameters

Parameter Item	Specification
Model	CPM01
Order Number	1KHL160038R0004G
Product Series	ABB AC 500 PLC
Communication Protocol	CS31 (ABB proprietary fieldbus)
Communication Rate	187.5 kbps (fixed)
Maximum Slave Stations	Supports up to 31 remote I/O stations (e.g., TB5xx/TB6xx series)
Transmission Distance	Maximum 1200 meters (with AWG22 shielded twisted pair cable)
Interface Type	RS-485, 2-wire half-duplex
Power Supply	Backplane power supply from CPU (+5V DC)
Operating Temperature	0°C to +55°C
Certifications	CE, UL, cUL

2.2 CS31 Communication System Parameters

Parameter Item	Specification
Communication Mode	Serial communication
Communication Standard	RS485 (twisted pair cable)
Communication Mechanism	Half-duplex (master-slave mode)
Communication Speed	187.5 baud
Transmission Control	CRC8 checksum
Maximum Remote Units	31 units
Maximum Bus Length	500 meters; maximum extended length of 2000 meters (via NCB module)
Bus Isolation Voltage	2kV optical isolation
Refresh Time	Minimum 2ms; typical 12ms for 31 remote units

3. Product Features

• High Integration: The module integrates multiple communication interfaces and supports diverse communication protocols, enabling convenient data interaction and connection with various industrial devices.
• Powerful Scalability: It supports distributed expansion through the CS31 bus interface and can be connected to multiple local expansion modules, adapting to industrial control scenarios of different scales and meeting diversified application requirements.
• High Reliability: Adopting advanced communication technology and optimized circuit design, the module delivers stable and reliable communication performance. The built-in CRC8 checksum mechanism effectively ensures data transmission security and accuracy.
• Simple Configuration: Parameters can be flexibly configured through professional programming software. Users can adjust communication parameters and interface modes according to actual on-site application demands.
• Online Programming: The system supports online modification and expansion of user programs without shutting down the operating system, improving debugging and maintenance efficiency.
• Clear Status Indication: Equipped with RUN (Operation), COM (Communication), and ERR (Error) LED indicator lights, which intuitively display the operating status of the equipment and facilitate rapid fault diagnosis and troubleshooting.

4. Structure and Composition

The ABB CPU01+CPM01 combined module is composed of two core functional modules and supporting accessories, with the specific composition as follows:

4.1 CPU01 (Processor Module)

• Undertakes the core control functions of the PLC system
• Executes user programs and processes system logical operations
• Manages and controls the overall operation of the entire control system

4.2 CPM01 (Communication Processor Module)

• Serves as the master station communication processor of the CS31 bus system
• Provides standard RS-485 interfaces for connecting remote I/O stations
• Realizes and manages data exchange between master and slave stations

4.3 Supporting Modules

• COM02: Auxiliary communication module (Part No.: 1KHL178025R0102U)
• AC 500 Main Rack: Professional module mounting carrier, occupying one standard I/O slot

5. Application Fields

Combined with its high stability, strong scalability and efficient communication performance, this module combination is widely used in the following industrial fields:

• Industrial Automation: Ideal for scenarios requiring remote monitoring, real-time data acquisition and automatic equipment control
• Marine Engineering: Applied in main engine alarm monitoring, equipment control and safety protection systems for ships
• Distributed Control System: Suitable for factory automated control as a core component of CS31 intelligent distributed automation system
• Remote I/O Expansion: Realizes wide-area distributed I/O control by matching with TB5xx/TB6xx series remote I/O stations
• Power and Energy Industry: Compatible with ABB PM500 series controllers for power system monitoring and control
• Crane and Offshore Engineering: Widely adopted in ABB Marine & Cranes standard application solutions

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