Module Description
Original instructions
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External Features
This illustration shows the external features of the 140CRA31908 module:
1 LED display
2 rotary switches
3 SERVICE port (ETH 1)
4 DEVICE NETWORK port (ETH 2)
5 DEVICE NETWORK port (ETH 3)
NOTE: The Ethernet ports are labeled on the front of the module.
Dust Cover
Insert dust covers into the unused Ethernet ports on the module:
External Port Descriptions
Two of the Ethernet ports allow implicit I/O exchanges with an M580 ePAC through the EIO network. (An implicit I/O exchange has a maximum frame size of 1,400 bytes.) You can use both Ethernet ports when you connect the 140CRA31908 module to an Ethernet main ring.
There is a maximum of 31 adapters in a single EIO network. For network topologies, refer to the Modicon M580 Hot Standby, System Planning Guide for Frequently Used Architectures.
The 140CRA31908 module has these 10/100 Base-T Ethernet ports:
Port
Description
SERVICE
The SERVICE port allows the diagnosis of Ethernet ports and provides access to external tools and devices (Control Expert, ConneXium Network Manager, HMI, etc.). The port supports these modes:
  • access port (default): This mode supports Ethernet communications.
  • port mirroring: In this mode, data traffic from one of the three other ports is copied to this port. This allows a connected management tool to monitor and analyze the port traffic.
  • disabled
NOTE:
  • You can configure the SERVICE port either on line or off line.
  • In port mirroring mode, the SERVICE port acts like a read-only port. That is, you cannot access devices (ping, connection to Control Expert, etc.) through the SERVICE port.
Refer to the SERVICE port configuration instructions.
DEVICE NETWORK
The DEVICE NETWORK copper port provides:
  • connections for remote I/O communications
  • cable redundancy (Ethernet ring)
CAUTION
ETHERNET CONNECTION NON-OPERATIONAL
Do not connect a device with a speed in excess of 100 Mbit/s to any adapter port.
Failure to follow these instructions can result in injury or equipment damage.
If you connect a device with a speed in excess of 100 Mbit/s, the Ethernet link may not be established between the device and the module through its port.