ABB CM579-PNIO PROFINET IO Controller Module
A two-port real-time PROFINET controller manages remote I/O stations through an integrated Ethernet switch.
Product Profile
CM579-PNIO adds the PROFINET IO controller role to an ABB AC500 installation. Its two RJ45 ports form an integrated switch, allowing the module to coordinate remote I/O devices over a real-time industrial Ethernet network. Firmware generation and Automation Builder version are important parts of configuration management.
Technical Data
| Manufacturer | ABB |
|---|---|
| Article Number | 1SAP170901R0101 |
| Product Family | AC500 |
| Network Role | PROFINET IO RT controller |
| Bus Connection | 2 RJ45 ports, PNIO1 and PNIO2 |
| Switch | Integrated 2-port switch |
| Ethernet | 100BASE-TX, 100 Mbit/s full duplex |
| Transfer Method | Ethernet II / IEEE 802.3 |
| Maximum Segment Length | 100 m |
| Maximum Remote I/O Stations | 128 |
| Minimum Bus Cycle | 1 ms |
| Conformance Class | CC A |
| Protocol Services | RTC class 1, RTA, DCP and CL-RPC; later firmware also supports LLDP and SNMP |
| Usable Terminal Bases | All TB56xx except TB5600 |
| Typical Current Consumption | 85 mA from the 24 V DC terminal-base supply |
| Lifecycle | Active |
System Role
- Operates as the PROFINET controller that establishes cyclic real-time I/O connections.
- Uses its integrated switch to provide two network attachment points.
- Supports discovery, configuration and acyclic communication alongside cyclic data exchange.
- Coordinates alarms that the controller application must evaluate.
- Connects distributed standard or safety I/O according to the engineered AC500 architecture.
Compatibility
- Select a supported TB56xx terminal base other than TB5600.
- Match the module firmware to the Automation Builder and CPU firmware generation.
- Projects created before the newer communication-stack generation may require a manual upgrade.
- Use the standard article unless the separate CM579-PNIO-XC environmental variant is specified.
- Validate device names, update times, topology and alarm handling in the complete controller project.
Applications
- PROFINET remote-I/O control in AC500 machine and process systems.
- Distributed I/O architectures using standard or engineered safety stations.
- Real-time field communication with up to the documented controller station limit.
- Replacement of an installed controller module with the same article and validated firmware path.
- Network modernization projects that preserve the AC500 control platform.
FAQ
Which PROFINET role does CM579-PNIO provide?
It is the IO controller that manages configured remote devices, not a PROFINET device module.
Are PNIO1 and PNIO2 independent subnets?
No. They belong to the integrated two-port switch for the controller network.
Why must firmware be checked before project download?
Supported communication stacks and project upgrade behavior depend on the Automation Builder and CPU firmware generation.
How many remote stations can the controller manage?
ABB specifies a maximum of 128 remote I/O stations for the module.
What should the application do with PROFINET alarms?
The controller program must include the required handling for process, diagnostic and module events.
Which commissioning checks confirm the network is ready?
Verify device names, topology, cycle settings, diagnostics, alarms and cyclic I/O exchange.
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