ABB 1MRB150020R0712 Temperature Measurement Module

I. Positioning and Applications

• Series Affiliation: Temperature Measurement Module of ABB AC 500 series PLC, used for acquiring temperature signals from industrial sites and converting them into digital values. It is a core component for temperature monitoring in scenarios such as process control and energy management.
• Core Functions:

• Connects to temperature sensors (TC, RTD, etc.) to achieve high-precision temperature measurement within the range of -200°C to +1820°C.

• Supports multi-channel synchronous acquisition, adapting to temperature monitoring requirements of equipment such as heating furnaces, reactors, and HVAC systems.

II. Technical Parameters and Characteristics

1. Hardware Specifications

• Channel Quantity: 8 analog input channels (supporting mixed configuration of thermocouples or RTDs).

• Sensor Types:

• Thermocouples: Types K, J, T, E, R, S, B, N, etc.

• RTDs: Pt100, Pt1000, Ni100, Ni1000 (supporting 2/3/4-wire connections).

• Measurement Accuracy: ±0.1% FS (typical for RTD mode), ±1°C (for thermocouple mode).

• Sampling Frequency: ≥100 Hz per channel, supporting high-speed temperature change monitoring.

2. Electrical Characteristics

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

• Isolation: Electrical isolation between channels (500 VAC), isolation between power supply and signals, with strong anti-interference capability.

• Wiring Method: Removable terminal blocks (spring-loaded or screw-type), supporting hot-swapping (requires system parameter configuration).

3. Environmental Parameters

• Operating Temperature: -25°C to +60°C, humidity 5%–95% (non-condensing).

III. Functional Highlights and Technical Features

1. Signal Processing and Calibration

• Linearization Compensation: Built-in thermocouple and RTD reference tables for automatic temperature-resistance/voltage signal conversion without external calculations.

• Self-Calibration Function: Supports hardware zero-point and full-scale calibration, automatically correcting drift errors periodically to ensure long-term measurement accuracy.

• Break Detection: Real-time monitoring of sensor loop disconnections, with configurable alarm thresholds and fault output modes.

2. Communication and Configuration

• Bus Interface: Communicates with the CPU module via the AC 500 backplane bus, supporting real-time data transmission (update cycle ≤1 ms).

• Parameter Configuration: Uses ABB Control Builder AC 500 software to set parameters such as sensor type, filtering time constant, and alarm thresholds.

• Data Format: Outputs 16-bit or 32-bit temperature values (engineering units, e.g., °C or °F), supporting floating-point conversion.

3. Safety and Diagnosis

• Fault Indication: Integrated LED indicators on the module panel (Power, Run, Error, Channel Fault) for intuitive status display.

• Safety Mechanism: Supports output hold (Hold) or preset value (Freeze) during faults to prevent equipment damage from abnormal temperatures.

IV. Comparison with Similar Modules (500MTM01, 500MTM10)

V. Configuration and Debugging Essentials

1. Software Tools

• Completed via Control Builder AC 500:

• Hardware configuration (defining module address, channel type);

• Temperature range mapping (e.g., -50°C~+150°C corresponding to digital values 0~32767);

• Alarm configuration (upper limit, lower limit, rate-of-change alarm).

2. Calibration Process

• Perform zero-point calibration (connect to a 0°C reference source) and full-scale calibration (connect to a known temperature point) via software during initial use or periodically (recommended annually).

3. Fault Troubleshooting

• If the Error light is on, check the channel fault code via software (e.g., 0x01 indicates disconnection, 0x02 indicates out-of-range).