AC500e Communication Modules | ABB CMA33
Manufacturer: ABB
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Part Number: CMA33
Condition：New with Original Package
Product Type: Communication Modules
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB CMA33 AC500e Communication Module
The ABB CMA33, also cataloged as the CMA33 Communication Module, operates as a dedicated hardware component for serial and fieldbus communication routing within AC500e CompactPlus PLC platforms. Powered by an onboard 64-bit ARM Cortex-A53 processor with 1 GB RAM and 8 GB Flash memory, the module executes high-throughput protocol conversion across Modbus RTU, Modbus TCP/IP, Ethernet/IP, and PROFIBUS networks. Physical interfaces include Ethernet, RS-485, CAN, and PROFIBUS ports, supporting fieldbus data exchange and real-time controller interaction compiled via standard IEC 61131-3 programming environments.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CMA33 |
| Brand | ABB |
| Origin | Sweden |
| Weight | 0.5 kg |
| Dimensions | 130 mm x 100 mm x 70 mm |
| Operating Temp | Standard Industrial Range |
| Power Consumption | Standard Backplane Bus Draw |
| Module Type | CompactPlus AC500e Communication Module |
| Processor | 64-bit ARM Cortex-A53 |
| Onboard Memory | 1 GB RAM, 8 GB Flash |
| Physical Interfaces | Ethernet, RS-485, CAN, PROFIBUS |
| Supported Protocols | Modbus RTU, Modbus TCP/IP, Ethernet/IP, PROFIBUS |
| Programming Languages | ST, LD, FBD (IEC 61131-3) |
| Certifications | CE, UL, CSA |
Backplane Bus Communication Velocity and Deterministic Networks
The module establishes high-speed communication channels across the internal AC500e backplane bus, utilizing the 64-bit ARM Cortex-A53 processor to maintain deterministic network execution. By managing protocol translation off-board, the unit minimizes scan time impact on the main processing unit while maintaining firmware flash compatibility across network nodes. The integrated Ethernet/IP, PROFIBUS, and Modbus stacks process incoming fieldbus packets with minimal transmission latency, enabling high I/O density scaling and synchronization across distributed automation networks.
Frequently Asked Questions
Q: How does the module manage multiple protocol execution simultaneously without causing processing delays?
A: The onboard 64-bit ARM Cortex-A53 CPU dedicatedly processes protocol stacks in firmware memory, offloading network translation cycles from the primary PLC CPU backplane.
Q: What are the backplane integration requirements for mounting the module into an AC500e base unit?
A: The module slots directly into the designated expansion slot on the AC500e CompactPlus base terminal unit, establishing internal bus contact and receiving power directly through the backplane connections.
Q: Which shielding practices must be applied to the RS-485 and PROFIBUS serial ports to prevent signal degradation?
A: All serial communications cables require twisted-pair shielded construction with cable screens terminated directly to the functional earth ground bar using short, low-impedance grounding clamps.
Field Installation Guidelines
Mount the module on a standard 35 mm DIN rail inside a protective industrial panel. Align the backplane connector with the AC500e base terminal unit and press firmly until the locking mechanism clicks into place. Maintain a minimum clearance of 50 mm above and below the housing to facilitate passive convection cooling through the enclosure vents.
Connect fieldbus cables—including Ethernet, RS-485, CAN, and PROFIBUS—using strain-relieved connectors. Keep serial data lines physically separated from high-voltage AC power wiring to prevent electromagnetic interference. Ground all cable shields at the panel entry point using ground clamps connected directly to the functional earth rail before applying power to the system rack.