229
APPENDIX F — UPC OPEN CONTROLLER
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
communications.
If the UPC Open controller has been wired for power, pull the
screw terminal connector from the controller's power terminals
labeled 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 AJ.
Table AJ — SW3 Protocol Switch Settings
for MS/TP
Verify that the EIA-485 jumpers below the CCN Port are set to
EIA-485 and 2W.
The example in Fig. I shows the BAS Port DIP Switches set for
76.8k (Carrier default) and MS/TP.
Fig. I — DIP Switches
Set the BAS Port DIP Switches DS2 and DS1 for the appropri-
ate communications speed of the MS/TP network (9600, 19.2k,
38.4k, or 76.8k bps). See Fig. I and Table AK.
Table AK — Baud Selection Table
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 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. H, J, and K.
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. 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 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.
Fig. J — Network Wiring
DS8DS7DS6DS5DS4DS3
Off Off Off Off On Off
BAUD RATE DS2 DS1
9,600 Off Off
19,200 On Off
38,400 Off On
76,800 On On
To Next Page
Loading...
