Description

ABB 07CR41 1SBP260020R1001

I. Functional Positioning and Application Scenarios

• Process Control: Automation of continuous production processes in chemical, petroleum, power, and other industries, such as closed-loop control of flow, temperature, and pressure.
• Logic Control: Sequential control in scenarios like mechanical manufacturing and wastewater treatment (e.g., motor start/stop and valve switching logic).
• Data Acquisition and Monitoring: Collaborates with SCADA systems to achieve real-time field data collection and communication with host computers.

II. Functional Features

High-performance Processing Capacity

• Equipped with a 16-bit processor running at 20MHz, supporting high-speed execution of PID control algorithms, logical operations, and data processing with a response time ≤10ms.
• Built-in 4MB program memory + 2MB data memory, capable of storing complex control programs (such as multi-variable decoupling control models) and historical data.

Flexible I/O Configuration

• Analog Input (AI): 8 channels, supporting signal types including 4-20mA, 0-10V, PT100 thermal resistors, and thermocouples (types K/J/T), with 12-bit accuracy.
• Analog Output (AO): 4 channels, outputting 4-20mA or 0-10V signals, supporting loads ≤500Ω.
• Digital Input (DI)/Digital Output (DO): 8 channels each. DI supports 24V DC level detection, and DO is relay output (250V AC/2A).

Multi-protocol Communication Capability

• Standard with RS-485 (Modbus RTU) and RS-232 interfaces, optional Ethernet (10/100Mbps) or Profibus DP interfaces.
• Enables data interaction with host computers (e.g., ABB Freelance, third-party PLCs) and intelligent instruments (e.g., pressure transmitters).

High-reliability Design

• Wide temperature range: -40°C to +70°C, adapting to high and low-temperature industrial environments (e.g., beside metallurgical furnaces, cold storage workshops).
• Electrical isolation: Optoelectronic isolation between I/O channels and CPU (isolation voltage ≥2500V AC), resistant to electromagnetic interference (compliant with EN 61000 standards).
• Redundancy support: Optional dual-power modules (24V DC redundant power supply) for automatic switching during faults, ensuring continuous system operation.

III. Technical Parameters

IV. Working Principle

Signal Acquisition and Processing Flow

• Input Stage: AI channels convert sensor signals (e.g., PT100 resistance from temperature sensors) into digital quantities through conditioning circuits (amplification, filtering), while DI channels detect the on/off status of switch signals.
• Computation Stage: The CPU processes input data according to preset programs (e.g., PID algorithms) to generate control quantities (e.g., valve opening commands).
• Output Stage: AO channels convert digital control quantities into analog signals to drive actuators (e.g., control valves), and DO channels control relay actions (e.g., motor start/stop).

Communication and System Integration

• Communicates with host computers via RS-485 or Ethernet interfaces, uploading real-time data (e.g., reactor temperature) and receiving control commands (e.g., setpoint modifications).
• Supports cascading with distributed I/O modules (e.g., ABB 07KT series) to expand system capacity (max. 128 I/O points).

V. Troubleshooting Guide

Power Abnormality

• Phenomenon: Power indicator (POWER LED) off, module unresponsive.
• Troubleshooting:
• Measure the voltage at the power terminals with a multimeter, ensuring it is within 20.4-27.6V DC.
• Check for loose power cables or blown fuses (if external fuses exist).
• For redundant power supplies, confirm automatic switching to the redundant supply after disconnecting the main power.

Abnormal Input Signals

• Phenomenon: Significant deviation between AI channel readings and actual sensor values; DI indicators do not change with switch actions.
• Troubleshooting:
• Measure sensor outputs (e.g., 4-20mA signals with a multimeter) to confirm sensor normality.
• Check input cables for short circuits/opens (e.g., correct three-wire connection of PT100).
• View channel calibration values via module diagnostic software and re-calibrate if necessary (e.g., AI channel zero/full-scale calibration).

Communication Interruption

• Phenomenon: Host computer cannot read module data; communication indicator (COM LED) flashes abnormally.
• Troubleshooting:
• Check communication cables (e.g., RS-485 wires for reverse connection, shield grounding).
• Confirm communication parameters (baud rate, data bits, parity) match the host computer (e.g., Modbus set to 9600bps/8N1).
• Replace the communication interface module (e.g., if the RS-485 interface chip fails, reconfigure the protocol after replacement).

Output Failure

• Phenomenon: No AO current output; DO relays do not actuate.
• Troubleshooting:
• Measure AO terminal voltage/current with a multimeter. If zero, check if module output enable is activated (via software configuration).
• For DO channels, manually short the output terminals. If the actuator acts, the relay contacts are damaged (replace the module).
• Check for load overload (e.g., AO output may be abnormal when load >500Ω).

VI. Typical Application Cases

Temperature Control of Chemical Reactors

• AI channels collect thermocouple temperature signals, the CPU runs PID algorithms to generate AO signals (4-20mA) to control heating valve opening, while DI monitors agitator motor status and DO controls alarm indicators.

Aeration Control in Wastewater Treatment

• Based on dissolved oxygen (DO) concentration collected by AI, automatically adjusts the frequency converter of the blower (AO outputs 0-10V) and communicates with the PLC via Profibus to upload data to the central control room.

VII. Comparison with Similar Products (vs ABB 07KT98C)