Omicron CMC 356, Reference Manual

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Connections and Interfaces
35
5.2.2 Ethernet Ports ETH1 and ETH2
The NET-1C board’s two PoE ( P ower o ver E thernet) ports ETH1 and ETH2
are standard 10/100Base-TX (twisted pair) Ethernet ports. They support
auto crossing (auto MDI/MDIX). This means you can use a standard cable
or a cross-over Ethernet patch cable.
Since the CMC test set can be controlled over a network, any distance
between the controlling computer and the test set is possible. This enables
direct remote control of the CMC test set, e.g., for end-to-end testing.
The Ethernet ports also provide the basis for the processing of substation
protocols according to the IEC 61850 standard. They allow flexible
configurations, e.g., for separation of data traffic from different network
segments or segregation of substation protocol data and test set control
commands.
The green LED indicates a link connection to a PC or a network. The yellow
LED indicates active traffic (receiving or transmitting) on the cable.
For detailed technical data about the Ethernet ports, please refer to section
6.5, "Technical Data of the Communication Ports" on page 65.
5.2.3 ! Button
The ! button enables you to recover from unsuccessful software image
downloads or other emergency situations. To start a new software image
download, press the
! button with a pointed tool or a paper clip while
powering-up the CMC. In that case, the test set will not start as usual but
wait for a new software image download.
5.2.4 Associate Button
The Associate button has the following functions:
• Association with controlling computer
An Ethernet communication port enables you to communicate with any
CMC available on the network. This may lead to dangerous situations
where a user accidentally connects to a device located on a desk of
somebody else, emitting unsafe voltages and endangering the person
working there.
Note: If your Ethernet ports ETH1 and ETH2 look different, i.e., ETH2 is
the connector version of Fast Ethernet over optical fiber, you have a NET-1
board installed in your test set. Refer to chapter 6.5, "Technical Data of the
Communication Ports" on page 65 for further information.
!
Associate