090-612 O (APR 09)
Page 11
FRICK® QUANTUM™ LX EVAPORATOR CONTROL PANEL
OPERATION – SERVICE
WIRING FOR COMMUNICATIONS
NOTE: Refer to the next sections entitled ZONE
CONFIGURATION CHART and EVAPORATOR SYSTEM
COMMUNICATIONS WIRING DIAGRAM, for additional
information about how the system is configured.
Interface Panel
Depending upon the number of Remote Panels
that have been installed, there could be up to
two different communications cables run to the
Interface Panel. One of these cables would feed
Remote I/O Panels 1 through 5, and a second
cable would feed Panels 6 through 10. The
incoming RS-485 communications cable(s) will be
a two-conductor, shielded type. Frick Controls
recommends the use of Belden #9841 or equal.
Wiring for 1 to 5 Remote Panels
For systems that have between 1 and 5
Remote Panels, use the following wiring
procedure:
â–¯ Open the panel door.
â–¯ On the inside of the enclosure door,
you will find the Quantumâ„¢ LX
controller, and a three position
terminal block, as shown here:
Notice that there are two wires that connect
from the left side of the terminal block, to
the Quantumâ„¢ LX at PL14 (Comm. 4). These
are the internal TX / RX communications
wires. You will be connecting the external
field communications wires to the other
(right) side of these terminals.
â–¯ Take the end of the incoming
communications cable, and strip
about 2 inches of insulation from
the end.
â–¯ Clip the shield wire back even with
the insulation, and either use heat
shrink tubing to cover the area, or
electrical tape. This will help to
ensure that any strands of the
shield that may be exposed don’t
come into contact with any live
voltage areas of the panel.
â–¯ Strip the end of each of the two
remaining conductors back about ¼
of an inch. Generally there are only
three color combinations available
depending on the type of cable
used. There will be either a black
and white/clear insulated wire, a
red and white/clear insulated wire,
or a red and black. Either way, one
of the wires should be black. Take
the black wire and insert it into the
top position of the terminal block
(labeled as –TX/RX).
â–¯ Take the remaining wire
(white/clear or red) and insert it
into the second position down from
the top of the terminal block
(labeled as +TX/RX).
â–¯ It is very important that the colors
of these wires follow this same
polarity scheme throughout the
daisy-chaining process to all panels.
â–¯ Refer to the Zone Configuration
Chart later in this guide to verify
dipswitch settings.
Wiring for 6 to 10 Remote Panels
NOTE: There are some earlier designed
systems that will not have the following
converter module. If you are planning to
expand an Evaporator system to 6 or more
Remote Panels, and you find that you DO
NOT have the module listed below, please
contact the Frick factory for instructions.
For systems that have Remote I/O Panels 6
through 10, use the following wiring
procedure:
â–¯ Open the panel door.
â–¯ Follow the same guidelines for
insulation and wire stripping as
described earlier.
â–¯ There is a DIN rail mounted below
the incoming power strip. On the
DIN rail is mounted a RS-232 to RS-
485 communications converter
Comm. 4 Location
+TX/RX
-TX/RX
N/C