Schneider 140CPU67261 hot standby processor module
The Schneider 140CPU67261 is a Unity hot standby processor of the Modicon Quantum series. The detailed introduction is as follows:
Performance Parameters
Clock Frequency: 266MHz, ensuring efficient and reliable operation to handle complex automation tasks.
Memory: The internal RAM is 3072KB, of which 1536KB is for data storage. It can be expanded via a PCMCIA card, with the program memory expandable up to 7168KB and file storage up to 8MB.
I/O Capability: Supports unlimited discrete and analog I/O.
For Ethernet remote I/O, discrete I/O can reach up to 31 nodes with 28 slots per node.
For distributed I/O under Modbus Plus network, it supports 8,000 inputs and 8,000 outputs; remote I/O supports 31,744 inputs and 31,744 outputs.
For analog I/O under Modbus Plus network, it supports 500 inputs and 500 outputs; remote I/O supports 1,984 inputs and 1,984 outputs.
Instruction Execution Time:
Boolean instructions: 0.0525–0.075μs
Word instructions: 0.045–0.06μs
Fixed-point arithmetic instructions: 0.045–0.06μs
Floating-point instructions: 0.4–0.5μs
Execution speed: 15k instructions per millisecond when 65% are boolean instructions and 35% are numeric instructions; 20k instructions per millisecond when 100% are boolean instructions.
Hardware Configuration
Slots and Racks: Supports up to 16 slots, including 2 local racks. It can connect to 63 distributed I/O stations and 31 remote I/O stations, as well as 2 S908 remote I/O racks, 2 Ethernet Quantum remote I/O racks, or 2 Ethernet X80 remote I/O racks.
Communication Interfaces: Integrates 1 Modbus Plus interface, 1 Modbus interface, 1 USB interface, and 1 fiber interface with hot standby protocol. It also supports Ethernet router functions, providing 6 Ethernet TCP/IP connections, 6 Modbus Plus connections, 6 Profibus DP connections, etc., and supports multiple network protocols.
Functional Features
Hot Standby Function: Enables seamless takeover by the standby processor when the primary processor fails or requires maintenance, ensuring continuous and stable system operation.
Safety Features: Equipped with process control checking to ensure reliable system operation and reduce risks of system failures or security vulnerabilities.

Application FieldsIndustrial Automation
Used in various automated production lines, robot control systems, and intelligent warehousing. For example:
Precisely controls mechanical actions at each workstation in automotive manufacturing lines to achieve accurate component assembly.
Manages shelf handling robots and automatic sorting equipment in intelligent warehousing for efficient cargo storage and sorting.
Power System
Monitors the status of power equipment such as transformers and generators and enables remote control. For instance:
Real-time collects power parameters (voltage, current, power, etc.) in substations, sends alarm signals, and takes control measures promptly in case of anomalies to ensure stable power system operation.
Oil and Gas
Suitable for oil and gas extraction, transportation, and processing. It can:
Control wellhead equipment and pipeline valves to ensure safe extraction and transportation of oil and gas.
Precisely control complex processes in refineries and other sites to meet relevant safety standards.

Municipal Engineering
Applied in:
Metro train signal transmission systems to ensure safe and punctual operation.
Intelligent management of urban infrastructure, such as streetlight control and bus stop information release.
Real-time monitoring and control of water treatment equipment in sewage treatment plants and waterworks to ensure water quality and stable supply.
Energy Sector
Participates in the control system of generator sets in power plants to precisely regulate the power generation process, improving efficiency and stability.
Controls equipment like wind turbines and photovoltaic arrays in new energy fields (wind farms, solar power stations) to ensure stable new energy output.
Building Automation
Manages automation systems for large buildings, including:
Air conditioning, elevator control, and lighting systems to improve energy efficiency, living comfort, and create intelligent building environments.
Chemical Industry
Precisely controls key equipment such as reactors and distillation columns in chemical production, real-time monitors parameters (temperature, pressure, liquid level, etc.), and ensures: