160
To wire the UPC Open controller to the BAS network:
1. Pull the screw terminal connector from the controller's BAS
Port.
2. Check the communications wiring for shorts and grounds.
3. Connect the communications wiring to the BAS port’s screw
terminals labeled Net +, Net -, and Shield.
NOTE: Use the same polarity throughout the network segment.
4. Insert the power screw terminal connector into the UPC
Open controller's power terminals if they are not currently
connected.
5. Verify communication with the network by viewing a mod-
ule status report. To perform a module status report using the
BACview keypad/display unit, press and hold the “FN” key
then press the “.” Key.
To install a BT485 terminator, push the BT485 on to the BT485
connector located near the BACnet connector.
NOTE: The BT485 terminator has no polarity associated with it.
To order a BT485 terminator, consult Commercial Products i-Vu
®
Open Control System Master Prices.
MS/TP WIRING RECOMMENDATIONS
Recommendations are shown in Tables 13 and 14. The wire jacket
and UL temperature rating specifications list two acceptable alter-
natives. The Halar specification has a higher temperature rating
and a tougher outer jacket than the SmokeGard specification, and
it is appropriate for use in applications where the user is concerned
about abrasion. The Halar jacket is also less likely to crack in ex-
tremely low temperatures.
NOTE: Use the specified type of wire and cable for maximum sig-
nal integrity.
Table 13 — MS/TP Wiring Recommendations
LEGEND
SPECIFICATION RECOMMMENDATION
Cable Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable
Conductor 22 or 24 AWG stranded copper (tin plated)
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
Sh
ielding Aluminum/Mylar shield with 24 AWG TC drain wire
Jacket
SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) O.D.
Halar Jacket (E-CTFE) 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 l
b/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
AWG — American Wire Gage
CL2P — Class 2 Plenum Cable
DC — Direct Current
FEP — Fluorinated Ethylene Polymer
NEC — National Electrical Code
O.D. — Outside Diameter
TC — Tinned Copper
UL — Underwriters Laboratories
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