Liebert OpenComms, Installation & User Manual

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Installation
17
USER CONNECTIONS FOR OPENCOMMS NIC
Since the OpenComms NIC can use simultaneous connections,
Up to 3 user connections are may be required: a permanent
network connection, a Modbus 485 connection and a temporary
serial connection for configuration/setup.
Confer with the network administrator or other responsible party
for arranging a network drop to the Liebert equipment. The
OpenComms Network card communicates via standard 10baseT
Ethernet network connection. Route the 10baseT cable to the
Liebert unit and connect to J3, the RJ45 jack on the interface
card. The OpenComms Network card will operate with any
10baseT Ethernet, regardless of operating system used.
The Modbus 485 connection will use the terminals marked
“Repeater.” (TB2) The Modbus server uses RTU protocol and
will allow for a maximum of 32 units on 4000ft. of wire on a
common line. EIA-485 repeaters may be necessary in order to
accommodate additional units or cable length. Point availability
may be referenced in the document, “NIC Reference Library,”
which may be downloaded at
www.liebert.com under the
OpenComms product family.
A serial connection to the interface card is necessary for
configuration and setup, but does not need to be permanently
installed. Using a DB9F-DB9F null-modem serial cable,
connect the “DTE Serial Port” P18 to an ASCII terminal or
computer running terminal emulation application. Proceed to
configuration as detailed in Section 3. Disconnect the serial
connection when configuration is completed.
Hyperterminal®
and Procomm® are examples of terminal emulation applications
running on Microsoft Windows® operating systems. All
trademarks are property of their respective owners.