QUANTUM™ LX EVAPORATOR CONTROL PANEL
OPERATION
090.610-O (DEC 12)
Page 11
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 confi gured.
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 in-
coming 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 Re-
mote Panels, use the following wiring pro-
cedure:
▯ Open the panel door.
▯ On the inside of the enclosure
door, you will fi nd the Quantum™
controller, and a communica-
tions terminal block. Notice that
there are two wires that connect
from the left side of the terminal
block, to the Quantum™ (Comm.
4). These are the internal TX / RX
communications wires. You will be
connecting the external fi eld com-
munications wires to the other
(right) side of these terminals.
▯ Take the end of the incoming com-
munications cable, and strip about
2 inches of insulation from the end.
▯ 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 en-
sure that any strands of the shield
that may be exposed don’t come
into contact with any live voltage
areas of the panel.
▯ Strip the end of each of the two re-
maining 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).
▯ 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).
▯ It is very important that the colors
of these wires follow this same po-
larity scheme throughout the dai-
sy-chaining process to all panels.
▯ Refer to the Zone Confi guration
Chart later in this guide to verify
dipswitch settings.
Wiring for 6 to 10 Remote Panels
For systems that have Remote I/O Panels 6
through 10, use the following wiring proce-
dure:
▯ Open the panel door.
▯ Follow the same guidelines for in-
sulation and wire stripping as de-
scribed earlier.
▯ For Q5 board installation, skip
this step. On controllers that have
the Q4 board, there is a DIN rail
mounted below the incoming pow-
er strip. On the DIN rail is mounted
a RS-232 to RS-485 communica-
tions converter module (Comm. 3),
and a power supply. Both of these
components have been pre-wired
at the factory. All that is left to do
is connect the fi eld connections.
Refer to the following pictorial for
connections:
TX/RX+ TX/RX-
▯ For Q5 board units, skip this step.