ABB CMA126 Overview

The ABB CMA126 is an industrial automation interface card (or control module) in the ABB CMA series, designed to provide reliable signal acquisition and communication within control systems such as PLCs and DCSs.

Key Features and Functions

Multi-Protocol Compatibility:
Supports common industrial communication protocols such as Modbus, Profibus, CAN, RS-485, and Ethernet, enabling seamless interoperability among devices from different manufacturers.

Analog/Digital I/O:
Offers high-precision analog inputs (-10 V to +10 V) and digital input/output channels for real-time acquisition of process variables such as temperature, pressure, and flow.

Redundant Design:
Utilizes a 1B1 redundancy structure, allowing redundancy for the CPU, memory, and power supply to enhance overall system reliability.

Compact and Robust:
Measuring approximately 155 mm × 155 mm × 2.5 mm and weighing around 0.2 kg, the module operates reliably within a –20 °C to +70 °C temperature range, suitable for long-term use in harsh industrial environments.

Fast Response:
Response time is less than 100 ms, meeting the requirements of high-speed control applications.

Typical Applications

Process Control Systems
(e.g., chemical, oil & gas, pharmaceutical industries) — for monitoring and regulating devices such as valves, pumps, and heat exchangers.

Machine Control and Robotics Systems
Used for acquiring real-time parameters like position, speed, and force.

Test and Measurement Platforms
Provides high-accuracy analog signal acquisition for precise data analysis.

Technical Specifications

Summary

By integrating high-performance I/O capabilities and multi-protocol communication support, the ABB CMA126 delivers reliable, fast, and flexible signal acquisition and data transmission for industrial automation systems. It serves as a key interface solution from ABB in both process control and machine control applications.