ABB CM5640-2ETH Ethernet Communication Module
Two independent Ethernet channels extend a compatible AC500 V3 CPU without adding a separate protocol processor.
Overview
CM5640-2ETH is an Ethernet port-extension module for ABB AC500 V3 processor modules. Its two RJ45 channels are independent rather than internally switched, and the protocol stacks continue to run in the controller CPU. This architecture expands physical network access while leaving the CPU communication limits in force.
Specs
| Manufacturer | ABB |
|---|---|
| Article Number | 1SAP176000R0080 |
| Product Family | AC500 V3 |
| Module Role | CPU Ethernet port extender |
| Ethernet Ports | 2 independent RJ45 channels |
| Physical Layer | 10/100Base-TX |
| Internal Switch | No |
| Transmission Rate | 10/100 Mbit/s with auto negotiation |
| Maximum Cable Length | 100 m at 100 Mbit/s |
| Supported Protocols | TCP/IP, UDP/IP, Modbus TCP, ICMP, DNS, SMTP, DHCP and PRP |
| Communication Bus | Dual-port RAM |
| Usable CPUs | PM56xx |
| Usable Terminal Bases | TB56xx |
| Supply Current | 47 mA per module at 24 V |
| Lifecycle | Active |
Features
- Adds two separately addressed Ethernet interfaces to a supported V3 processor installation.
- Keeps each port on its own subnet because the channels are not an onboard switch pair.
- Supports programming, online access and industrial Ethernet communication through the CPU.
- Provides five state indications and two rotary station-identification switches.
- Can support the licensed PRP option when the required firmware conditions are met.
Applications
- Separating a supervisory connection from a field Ethernet segment on one AC500 V3 CPU.
- Adding physical interfaces for Modbus TCP devices without changing the controller family.
- Providing dedicated service and machine-network paths that use different subnets.
- Supporting network architectures that require two independent copper Ethernet channels.
- Expanding an installed PM56xx system while keeping CPU communication capacity under review.
Lifecycle
- ABB lists the standard article in the Active lifecycle phase.
- The module extends ports but does not increase the processor communication limits or offload protocol execution.
- Place every CPU and module Ethernet interface in a non-overlapping subnet.
- Review CPU and coupler firmware before enabling newer functions such as PRP.
- Verify addressing, routing and application communication on both channels after installation.
FAQ
Are the two CM5640-2ETH ports internally switched?
No. ABB specifies two independent Ethernet channels, so each is configured as its own interface.
Does the module increase the CPU protocol capacity?
No. The same processor limits apply because the protocol stacks still run in the CPU.
Why must each interface use a different subnet?
The controller selects the route by the destination and subnet match; overlapping networks can make selection ambiguous.
Which processor generation is intended?
ABB specifies PM56xx V3 processors for this port-extension module.
Can the module provide Modbus TCP communication?
Yes, subject to the capabilities and limits of the connected V3 CPU project.
What should be tested after adding the module?
Confirm link status, unique subnet settings, route selection and data exchange on each channel.
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