ABB CMA132
I. Overview
The ABB CMA132 is a generator relay terminal board launched by ABB, which is part of the Advant DCS/800xA series control system. This product is mainly used to connect, isolate, and convert signals between generator protection relays and the central control system, ensuring the stable operation and reliable protection of generators. It plays a crucial role in power generation systems and is an important component for realizing generator monitoring, protection, and control functions.
II. Parameters
The main parameters of the ABB CMA132 include:
- Input voltage: 24 V DC ± 20%
- Input current: maximum 5 mA
- Output voltage: 0-10 V DC
- Output current: 4-20 mA DC
- Operating temperature range: -40℃ to +85℃
- Storage temperature range: -40℃ to +85℃
- Dimensions: 48×96 mm
- Installation method: Panel mounting
- Display: 4-digit LED
- Enclosure: IP65 (front panel)
- Communication protocol: Modbus RTU
- Input channels: 16
- Input types: Thermocouple, RTD, mV, mA, V, and potentiometer
- Resolution: 16-bit
- Isolation: 1500 VAC (between input channels and power supply)
- Power supply: 24 VDC or 48 VDC
- Power consumption: less than 25 W
- Weight: 1.2 kg
III. Product Features
- High reliability: Adopts industrial-grade design and high-quality materials to ensure stable operation even in harsh environments.
- Easy to use: Modular design, simple installation and configuration, allowing users to get started quickly.
- Powerful functions: Supports multiple protection and control functions to meet the needs of different application scenarios.
- Strong scalability: Supports the expansion of multiple functional modules to meet different application requirements.
- Rich communication interfaces: Supports communication protocols such as Modbus RTU, facilitating data interaction with other devices and systems.
- High safety: Equipped with safety monitoring functions to ensure the safety of personnel and equipment.
IV. Structure and Composition
The ABB CMA132 consists of multiple modules, including:
- Input module: Used to receive signals from the generator.
- Output module: Used to transmit control signals to the relevant actuators of the generator.
- Communication module: Supports communication protocols such as Modbus RTU to realize data exchange with the central control system.
- Power module: Provides 24 VDC or 48 VDC power supply for the entire module.
V. Application Fields
The ABB CMA132 is widely used in the following fields:
- Power plants: Used for generator protection and control.
- Substations: Used for monitoring and protection of power systems.
- Distribution networks: Used for the stable operation of power systems.
- Industrial control systems: Used for industrial automation and process control.

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