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EA-1 User Manual
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commands directly using the HTTP protocol. As for the Telnet connection, the host device is the “client” and the EA-1
device is the “server”. Details are listed later on in this document.
UDP:
For situations where Telnet is not available (for example - working with some PLCs) another option is to connect to
the device using a UDP connection. A special protocol is defined for working with UDP, see details below in the
section "Details of User Commands”.
USB Virtual COM Port:
A Mini-B USB connector is provided on the EA-1 device in addition to the RJ-45, to allow customers to connect to the
device separately from the Ethernet for configuration purposes. This connection can be used to query or set the IP
address for the first time, or to switch between dynamic and static IP address modes. For example, if the user is not
certain of the IP address of the device and therefore cannot connect via the Ethernet connector, they have the
option to connect via the USB port and query the IP address in an independent way from the Ethernet.
More details of using this connection are added below together with the basic configuration information.
This type of connection is supported also by the “
OphirEthernetApp”
software supplied with the device.
Ethernet Cables and Ground Connections to EA-1 Device:
See Appendix 3 below for information on what type of Ethernet cables are recommended to be used with the EA-1
device, and for information on issues of grounding and isolation.