APPENDIX D — OPTIONAL BACNET COMMUNICATIONS WIRING (cont)

Fig. E — BT485 Terminator Installation

To install a BT485 terminator, push the BT485 terminator 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 — Recommen- dations are shown in Tables C and D. The wire jacket and UL

temperature rating specifications list two acceptable alterna- tives. 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 extremely low temperatures.

NOTE: Use the specified type of wire and cable for maximum signal integrity.

 

 

Table C — MS/TP Wiring Recommendations

 

 

 

 

 

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

 

Shielding

 

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 lb/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

 

LEGEND

 

 

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

 

 

104

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Carrier 30RAP010-060 specifications Table C MS/TP Wiring Recommendations, Specification Recommmendation, Awg, CL2P, Fep
Page 103 Page 105

30RAP010-060 specifications

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