ABB 1MRB150021RO116 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. 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. Comparison with Similar Modules (vs. 500ITM01, 500ITM03)