Carrier Weathermaster 48P030-100 Controls, Start-Up, Operation, Service, And Troubleshooting page 245

Configure the BAS Port for BACnet MS/TP
Use the same baud rate and communication settings for all con-
trollers on the network segment. The UPC Open controller is fixed
at 8 data bits, No Parity, and 1 Stop bit for this protocol's commu-
nications.
If the UPC Open controller has been wired for power, pull the
screw terminal connector from the controller's power terminals la-
beled Gnd and HOT. The controller reads the DIP Switches and
jumpers each time power is applied to it.
Set the BAS Port DIP switch DS3 to "enable." Set the BAS Port
DIP switch DS4 to "E1-485." Set the BMS Protocol DIP switches
DS8 through DS5 to "MSTP." See Table AQ.
Table AQ — SW3 Protocol Switch Settings
for MS/TP
DS8 DS7 DS6
Off Off Off
Verify that the EIA-485 jumpers below the CCN Port are set to
EIA-485 and 2W.
The example in Fig. AB shows the BAS Port DIP Switches set for
76.8k (Carrier default) and MS/TP.
Fig. AB — DIP Switches
Set the BAS Port DIP Switches DS2 and DS1 for the appropriate
communications speed of the MS/TP network (9600, 19.2k,
38.4k, or 76.8k bps). See Fig. AB and Table AR.
APPENDIX G — UPC OPEN CONTROLLER (CONT)
DS5 DS4 DS3
Off On Off
Fig. AC — Network Wiring
Table AR — Baud Selection Table
BAUD RATE
9,600
19,200
38,400
76,800
Wiring the UPC Open Controller to the MS/TP
Network
The UPC Open controller communicates using BACnet on an
MS/TP network 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 daisy-
chain configuration. Wire specifications for the cable are 22 AWG
(American Wire Gauge) 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 net-
work segment to add bias and prevent signal distortions due to
echoing. See Fig. AA, AC, and AD.
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
module status report. Use Field assistant to set up the
UPC, then perform a Modstat using the i-Vu tools Field
Assistant.
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.
245
DS2 DS1
Off Off
On Off
Off On
On On
®