ABB CMA121 Communication Module
Description
ABB CMA121 Communication Module is a high-speed control network module designed for the System 800xA and AC 800M controller platforms, providing mission-critical network resilience for real-time process control systems.
| Specification | Value |
|---|---|
| Brand | ABB |
| Model | CMA121 |
| Communication Ports | Dual isolated 10/100 Mbps Ethernet ports |
| Communication Protocol | ABB deterministic CI854 protocol |
| Working Voltage | 220V |
| Output Frequency | 50Hz |
| Certification | CE |
| Origin | Switzerland |
Key Features:
- Supports star or ring redundant topologies with hardware-accelerated failover for uninterrupted data flow
- Seamless integration with Control Builder M software for real-time monitoring of communication status, port traffic, and fault history
- No external power or configuration tools required; automatically inherits network parameters from host CPU on power-up
- Supports hot swap for online replacement without disrupting other controller functions
Applications:
- Continuous process industries including petrochemical, power generation, metallurgy and mining, and water treatment
- Backbone communication link connecting remote I/O stations to central controllers in distributed control systems (DCS)
- Modernization upgrade projects for ABB Bailey INFI 90 or early Advant OCS systems
Related Models:
- ABB CMA120
- ABB CMA130
- ABB NPBA-12