090-020 CS (FEB 09)
Page 6
FRICK® QUANTUM™ LX COMPRESSOR CONTROL PANEL
COMMUNICATIONS SETUP
ETHERNET AND NETWORKING
DESCRIPTION
Frick® Controls uses Ethernet as the primary method
of connecting one or multiple Quantum™ LX panels to
a common computer network. In the past, this
interconnection would have been done by serial
protocol wiring, such as RS-232/422/485. But with the
capabilities of today’s technology, Ethernet is the
quickest and most efficient way of providing this
interconnectivity.
Whereas the old serial communications methods
(RS232, etc.) were slow by today’s standards (kilobits
per second transmission speed), Ethernet is available
in two speeds: 10 Mbps and 100 Mbps.
NOTE: For connection examples, refer to the
section of this manual entitled Q
uantum™ LX
Local Ethernet Configurations
and
Quantum™ LX
Ethernet Network Configurations.
Ethernet is a data and information sharing system. To
put it simply, it is a method of connecting one
computer to many others on a common network. This
network can consist of both hardwired connections,
and wireless devices, hence the name
ETHERNET
.
Any Windows or Linux based computer is capable of
accessing this network. All that is needed is either a
modem, USB port, or an Ethernet port. These devices
provide the necessary point of connection for one
end (branch) of the connection (a home computer for
instance). The other point that completes the
connection is usually provided by an
I
nternet
S
ervice
P
rovider (or
ISP
). The Internet Service Provider
usually has a very large network router, or means of
bring in many individual connections. The router then
assigns a discrete and individual address to each
connection (much like a street address). This address
is known as an Internet Protocol address (IP). The IP
address consists of a series of 4 to 12 digits, and is
normally transparent to the end user.
For those individuals familiar with using the internet,
they are familiar that every time they activate their
web browser (the software that allows your computer
to connect), there is an address bar that appears near
the top of the screen. This address bar is where you
would enter the IP address of the computer or
network that you would like to communicate with. To
make this simpler, these numeric IP addresses are
also coded to allow alpha-numeric names to be
masked over them, so that rather than having to
enter an address of 216.27.61.137, you can simply
enter in
www.jci.com
, as an example. Although the
actual process is more detailed and complicated than
this basic explanation, the end result is that most of
the work is being done invisibly.
The following write up describes how to set up the
Quantum™ LX to do this
behind the scenes
work, so
that it can communicate both at the Internet level,
and at a local Ethernet level.
CABLING
Each Quantum™ LX Ethernet connection must be
individually cabled (known as a
homerun
) direct from
a switch or computer. Unlike RS422/485
communications which allowed for cable daisy-
chaining, Ethernet connections do not allow this.
This type of cabling is designed to handle the 100-
Mbps speed needed by Ethernet. Both ends of each
cable must have an RJ-45 connector attached. The
RJ-45 connector looks similar to the RJ-11 connector
on the end of a telephone cord but is slightly larger
(and not compatible). You can buy Cat 5 cables in
predetermined lengths with the connectors already
attached (for short runs), or you can buy the cable in
rolls, cut it to length and install the RJ-45 connectors
to the ends (up to 100 meters per each cable run).
Although Frick® Controls recommends the use of
shielded, twisted pair Cat 5 cable, if the cable is not
properly constructed and tested, it can actually be
more detrimental to the network than unshielded
cable. As long as all of the cables that are used have
been properly constructed AND tested, either
shielded or unshielded are acceptable. This is mostly
due to the excellent (electrical) noise immunity that is
inherent with Ethernet componentry.
NOTE: Follow standard networking procedures
for the interconnections of all components. For
individual cable runs in excess of 300 feet (~100
meters), a
Switch
/
Hub
must be used for each
additional run.
Cabling Do’s and Don’ts
–
Frick® Controls
recommends the following guidelines when installing
and using CAT 5 Ethernet cable:
Do:
Do run all cables in a star (homerun)
configuration.
Do keep all individual cable lengths
under 300 feet. If greater distances are
needed, use a switch/hub every 300
feet.
Do ensure that the twists of the wire
pairs within the cable are maintained
from end to end.
Do make gradual bends in the cable.
Keep each bend radius over one inch.
Do keep all cables tie wrapped neatly.