ABB LM80.A
1. Product Overview
The ABB LM80.A is a high-precision loop display and control module designed by the ABB Group for its Advant OCS Open Control System. In process automation systems, this module plays a key role as a "local control expert," specifically providing independent single-loop or dual-loop process control and display functions.
Integrating high-precision process signal processing, advanced PID control algorithms, and a clear two-line LCD display, the ABB LM80.A module enables continuous process variable monitoring, accurate control calculations, and intuitive local operation display. It supports multiple input signal types, including analog inputs, thermocouples (TC), resistance temperature detectors (RTD), and millivolt signals, while offering various control output methods such as analog outputs and relay outputs.
2. Product Specifications
Product Model: LM80.A
Manufacturer: ABB
Product Type: Loop Display and Control Module
Display Type: Two-line LCD display with backlight
Display Accuracy: ±0.2% of span
Control Loops: 1 or 2 independent PID control loops
Input Signals: 4-20mA, 0-10V, TC (J, K, T, E), RTD (Pt100, Ni100), mV
Output Signals: 4-20mA, 0-10V, relay contacts (2A/250VAC)
Power Supply Voltage: 24VDC (19.2-31.2VDC) or 100-240VAC (85-264VAC)
Power Consumption: Maximum 5W
Operating Temperature: -10°C to +55°C
Storage Temperature: -25°C to +70°C
Protection Rating: IP54 (front panel)
Installation Method: Panel cutout installation (92×92mm)
Certifications: CE, UL, cULus
3. Structure and Composition
The ABB LM80.A module features a robust plastic housing design. Its front panel is equipped with a high-contrast two-line LCD display (16 characters per line), four function buttons, and multiple status indicators. The display can simultaneously show process variables (PV), setpoints (SP), and output values (OUT), and supports bar graph display.
Internally, the module is built on a high-performance microprocessor architecture, including precision analog input processing circuits, high-precision A/D converters, digital signal processors (DSP, used for PID calculations), output drive circuits, and power management units. The input processing circuit includes a programmable signal conditioner to adapt to various sensor types; the A/D converter provides 16-bit resolution; the DSP runs advanced PID control algorithms; and the output drive circuit provides isolated analog or relay outputs.
The module connects to on-site sensors and actuators via terminal blocks at the rear, supporting both screw terminal and spring terminal connection methods.
5. Application Fields
The ABB LM80.A module is widely used in industrial process fields that require local display and control:
In HVAC (Heating, Ventilation, and Air Conditioning) systems: Used for temperature and humidity control.
In water treatment systems: Used for pH value and flow control.
In the food and beverage industry: Used for fermenter temperature control.
In plastic machinery: Used for extruder temperature control.
In heat treatment equipment: Used for furnace temperature control.
In environmental monitoring stations: Used for multi-parameter collection and display.
It is an ideal choice for any occasion that requires independent loop control combined with local display.
6. Installation and Maintenance
6.1 Pre-Installation Preparation
Before installing the ABB LM80.A module:
Confirm that the installation environment meets the temperature and humidity requirements.
Prepare an appropriate panel cutout (92×92mm) and ensure the installation location is easy for observation and operation.
Check that the power supply voltage meets the module’s requirements and prepare suitable power cables.
Verify that the sensor and actuator models match the module’s input and output types.
6.2 Maintenance Recommendations
Regularly clean the front panel to maintain clear display.
Check if terminal blocks are tight to prevent poor contact.
Regularly calibrate input and output accuracy to ensure accurate measurement and control.
Use the front-panel self-diagnostic function to check the module status and promptly identify and handle abnormalities.
When replacing the module: First disconnect the power supply, record the current parameter settings, remove the old module after disconnecting the wiring. After installing the new module, restore the parameter settings and verify that the functions are normal.
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If you would like to learn more about our products and services, please feel free to contact us at any time!
Sales Manager : Jinny
Email : sales1@xrjdcs.com
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