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Avoiding Noise
Avoid running communication wires or sensor input wires
next to AC power wires or the controller’s relay output
wires. These can be sources of noise that can affect signal
quality . Common sources of noise are:
Spark igniters
Radio transmitters
Variable speed drives
Electric motors (> 1hp)
Generators
Relays
Transformers
Other electronic modules
Induction heaters
Video display devices
Lamp dimmers
Fluorescent lights
Parallel runs with power lines
Large contactors,
(i.e., motor starters)
ARC156 Wiring Specifications
Below are the specifications for ARC156 wiring. The wire
jacket and UL temperature rating specifications list two
acceptable alternatives . Halar has a higher temperature
rating and a tougher outer jacket than SmokeGard, and it is
appropriate for use in applications where you are concerned
about abrasion . Halar is also less likely to crack in extremely
low temperatures .
NOTE:
Use the specified type of wire and
cable for maximum signal integrity .
Communications Wiring
ARC156 Specifications
Description
Single twisted pair, low capacitance (12pF), CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable
Conductor
22 AWG (7x30) stranded copper (tin plated)
0.030 in. (0.762 mm) O.D.
NOTE:
24 AWG can be used for segments <200 ft. (6.7 m).
Insulation
Foamed FEP
0.015 in. (0.381 mm) wall
0.060 in. (1.524 mm) O.D.
Color code
Black/white
Twist lay
2 in. (50.8 mm) lay on pair
6 twists/foot (20 twists/meter) nominal
Shielding
Aluminum/Mylar shield with 24 AWG (7x32) TC drain wire
Jacket
SmokeGard
(SmokeGard PVC)
0.021 in. (0.5334 mm) wall
0.175 in. (4.445 mm) O.D.
Halar
®
(ECTFE)
0.010 in. (0.254 mm) wall
0.144 in. (3.6576 mm) O.D.
DC resistance
15.2 Ohms/1000 feet (50 Ohms/km) nominal
Capacitance
12.5 pF/ft (41 pF/meter) nominal conductor to conductor
Characteristic impedance
100 Ohms nominal
Weight
12 lbs./1000 feet (17.9 kg/km)
UL temperature rating
SmokeGard
167°F (75°C)
Halar
-40 to 302°F (-40 to 150°C)
Voltage
300 Vac, power limited
Listing
UL: NEC CL2P, or better
WARNING/ADVERTISSEMENT
For field installation of Port 1
communication wiring, installer must
use:
•
ARC-156 communication wire
• single-twisted pair
• shielded with drain
•
low capacitance (12.5 pF/ft)
• 22AWG
This conductor must be daisy chained
from the CoolLogic Controller to each
chiller module.
Maximum separation of low voltage
communication and high voltage
power wiring is required.
The communication cable must be
installed in its own conduit. Routing
must enter and exit the low voltage
section of the control box where the
controller is located and should not
be ran parallel to, or any closer than,
6 inches from any high voltage AC or
DC wiring either inside or outside of
the machinery compartment.
(See IOM or contact ClimaCool for
complete specification.)
Pour l’installation sur place du
câblage de communication du port 1,
l’installateur doit utiliser:
•
le câble de communication ARC-156
• Paire à simple torsion
• blindée avec drain
•
faible capacité (12.5 pF/ft)
• 22AWG
Ce conducteur doit être connecté en
guirlande du contrôleur CoolLogic à
chaque module de refroidissement.
Le fil doit être installé dans son propre
conduit. L’acheminement doit entrer
et sortir de la section basse tension
du boîtier de commande où se trouve
le contrôleur et ne peut pas circuler
à moins de 6 à 8 pouces de tout
câblage de tension CA à l’intérieur
ou à l’extérieur du compartiment des
machines.
(Voir l’IOM ou contacter ClimaCool
pour les spécifications complètes.)
Summary of Contents for CLIMACOOL UCR 30
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