55
BACnet* Communication Option Wiring —
The
BACnet Communication option uses the UPC Open controller.
The controller communicates using BACnet on an MS/TP net-
work segment communications at 9600 bps, 19.2 kbps, 38.4
kbps, or 76.8 kbps.
Wire the controllers on an MS/TP network segment in a dai-
sy-chain configuration. Wire specifications for the cable are
22 AWG (American Wire Gage) or 24 AWG, low-capacitance,
twisted, stranded, shielded copper wire. The maximum length
is 2000 ft.
Install a BT485 terminator on the first and last controller on
a network segment to add bias and prevent signal distortions
due to echoing. See Fig. 35-37.
To wire the UPC Open controller to the BAS (Building Au-
tomation System) 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 current-
ly connected.
5. Verify communication with the network by viewing a
module 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 — Recommen-
dations are shown in Tables 25 and 26. 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.
S
UCTION
ACCE
SS
PORT
Fig. 34 — Suction Access Port (Sizes 018-030 Shown)
*
Sponsored
b
y ASHRAE (American Society of Heating, Refrigerat-
ing, and Air-Conditioning Engineers).
Summary of Contents for AQUASNAP 30RAP010-150
Page 12: ...12 Fig 9A Unit Rigging Label Detail 010 060 Sizes a30 4916 ...
Page 14: ...14 a30 5733 Fig 10 Dimensions 30RAP010 and 015 Units ...
Page 15: ...15 a30 5734 Fig 11 Dimensions 30RAP018 030 Units ...
Page 16: ...16 a30 5735 Fig 12 Dimensions 30RAP035 060 Units ...
Page 17: ...17 Fig 13 Dimensions 30RAP070 090 Units a30 5731 ...
Page 18: ...18 Fig 14 Dimensions 30RAP100 115 Units a30 5730 ...
Page 19: ...19 a30 5732 Fig 15 Dimensions 30RAP130 150 Units ...
Page 54: ...54 Fig 33 Typical Main Power and Control Connections a30 5514 ...
Page 71: ......