ABB 500ITM02 1HDF930712X010 Temperature Measurement Module

I. Positioning and Applications

• Series Affiliation: Intelligent Temperature Measurement Module of ABB AC 500 series PLC, primarily used for temperature data acquisition and processing in industrial fields. It supports access to various temperature sensors and is suitable for automation systems requiring high-precision temperature monitoring (such as chemical, metallurgical, HVAC, etc.).
• Core Functions:

• Real-time acquisition of temperature sensor signals (RTD, TC, etc.), conversion to digital quantities, and transmission to PLC controllers.

• Supports temperature compensation, linearization processing, and fault diagnosis to ensure accuracy and reliability of measurement data.

• Can be connected to the AC 500 system as an independent module or interconnected with other devices via communication interfaces.

II. Technical Parameters and Characteristics

1. Input Channels and Sensor Support

• Channel Quantity: 8 analog input channels, supporting differential or single-ended input.

• Sensor Types:

• RTD: Pt100, Pt1000, Ni100, Ni1000, etc. (supporting 2/3/4-wire connection).

• TC: Types K, J, T, E, N, S, R, B.

• Others: 0-10V voltage signals, 4-20mA current signals (requiring software parameter configuration).

2. Measurement Accuracy and Range

• Accuracy: ±0.1% (RTD), ±0.5℃ (TC, under 25℃ reference temperature).

• Temperature Range:

• RTD (Pt100): -200℃ ~ +850℃.

• Thermocouple (Type K): -200℃ ~ +1372℃.

3. Electrical and Environmental Characteristics

• Power Supply: 24VDC (±20%), power consumption ≤5W.

• Isolation: Electrical isolation between channels (500V AC/1min), with strong anti-interference capability.

• Mounting Method: 35mm DIN rail mounting, supporting vertical/horizontal installation.

• Operating Temperature: -25℃ ~ +60℃, humidity 5%~95% (non-condensing).

III. Functional Features and Technical Highlights

Intelligent Diagnosis and Compensation

• Supports open-circuit detection, short-circuit detection, and sensor fault alarms (such as over-temperature, out-of-range).

• Built-in cold junction compensation (for thermocouples) and linearization algorithms to reduce measurement errors.

Communication and Data Processing

• Real-time communication with AC 500 CPU via backplane bus, data update cycle ≤1ms (full channels).

• Supports conversion of temperature data to engineering units (℃/℉) and direct mapping to PLC memory addresses.

Configuration Flexibility

• Each channel can be independently configured for sensor type, filtering parameters (low-pass filtering), and alarm thresholds.

• Supports hot-swapping, allowing module replacement without power-off for easy maintenance.

IV. Application Scenarios

Industrial Temperature Monitoring Systems

• In chemical reactors, monitor material temperature via Pt100 RTD and real-time control heating/cooling systems.

• In metallurgical furnaces, collect furnace temperature data using Type K thermocouples and link with PLC for closed-loop temperature control.

HVAC and Energy Management

• In air conditioning systems, monitor supply/return air temperature to optimize energy consumption control.

• In thermal pipe networks, achieve heat distribution and leakage detection through multi-point temperature acquisition.

Process Automation

• Real-time temperature monitoring of food processing equipment (such as sterilizers) to ensure process parameters meet standards.

• Temperature data acquisition and recording for freeze dryers and incubators in the pharmaceutical industry.

V. Interfaces and Wiring

1. Hardware Interface Layout

• Signal Interface: 20-pin terminal block, supporting screw or spring terminal connections for sensor cables.

• Communication Interface: Backplane bus interface, inserted into the CPU rack or expansion rack of AC 500 series PLC.

2. Typical Wiring Examples

• Pt100 (4-wire): Connect the 4 wires of RTD to the module's measurement terminals (e.g., A+, A-, B+, B-) without additional reference resistors.

• Type K Thermocouple: Positive pole connected to "+" terminal, negative pole to "-" terminal; cold junction compensation terminals (C+, C-) need to connect compensation wires or ground.

VI. Configuration and Debugging

1. Software Tools

• Use ABB Control Builder AC 500 for module configuration:

• Define channel sensor types, measurement ranges, filtering coefficients, and alarm parameters.

• Map temperature data to PLC's I/O addresses or data blocks (DB).

2. Status Diagnosis

• Indicator Lights:

• Power (green): Illuminates when power is normal.

• Run (green): Flashes when the module is operating.

• Error (red): Illuminates in case of sensor failures or communication anomalies.

• Fault Troubleshooting: View channel status logs via Control Builder to locate issues such as open circuits and over-temperature, and check wiring and sensor compatibility.

VII. Comparison with Similar Modules (vs. 500ITM01, 500ITM03)

VIII. Conclusion

• Strong Compatibility: Supports all types of temperature sensors, adapting to measurement needs in different industrial scenarios.

• Accuracy and Reliability: Electrical isolation design and built-in compensation algorithms ensure stable measurement in harsh environments.

• Flexible Configuration: Independent channel parameter setting and hot-swapping function facilitate system expansion and maintenance.