Installation - Controllers
UNT-SVX07E-EN
75
Tracer UC400 Controller
This section provides information about wiring the UC400
controller.
Note:
For more detailed information, refer to:
•
BAS-SVX20C-EN Tracer UC400 Programmable
Controller Installation, Operation, and Maintenance
manual
Note:
For Wireless Communication Interface (WCI) see
the following reference documents:
•
BAS-SVX40A-EN - Wireless Comm Installation,
Operation and Maintenance manual
•
BAS-SVX55A-EN - Wireless Comm Network Design
Best Practices Guide
Communication Wire Specifications
All wiring must comply with the National Electrical Code
(NEC™)
and local electrical codes.
Field-supplied BACnet MS/TP link wiring must be installed
in compliance with NEC and local codes. The wire must be
low-capacitance, 18-gauge, stranded, tinned-copper,
shielded, twisted-pair.
Note:
For more details, refer to Wiring Guide: Unit
Controller Wiring for the Tracer SC™ System
Controller (BAS-SVN03D-EN, or the most recent
revision).
General Wiring Guidelines
To connect wires to the UC400 controller or the expansion
modules:
1.
Strip the wires to expose 0.28 inch (7 mm) of bare wire.
2. Insert the wire into a terminal connector.
3. Tighten the terminal screw to 0.5 to 0.6 N-m (71 to
85 ozf-in or 4.4 to 5.3 lbf-in.).
4. Tug on the wires after tightening the screws to ensure
all wires are secure as shown on the right.
Setting the Address
The rotary address dials on the UC400 controller serve one
or two purposes depending upon the network: they are
always used for the MAC Address, which is sometimes all
or part of the BACnet Device ID (See
Figure 66
).
Use a 1/8 inch (3.2 mm) flathead screwdriver to set rotary
address dials. Dials rotate in either direction.
MAC Address
The MAC Address is required by the RS-485
communication protocol on which BACnet operates. A
UC400 controller can use a MAC Address from 001 to 120.
Important:
Each device on the link must have a unique
MAC Address/Device ID. The controller
rotary addresses should be sequentially set,
with no gaps in the numbering, starting with
001 on each link (for example 001, 002, 003,
004 and so on). A duplicate address or a 000
address setting will interrupt
communications and cause the Tracer SC
device installation process to fail.
BACnet Device ID
The BACnet Device ID is required by the BACnet network.
Each device must have a unique number from 001 to
4094302. See
Figure 67
.
BACnet networks without a Tracer SC system
controller
On BACnet networks without a Tracer SC system
controller, the Device ID can be assigned one of two ways:
•
It can be the same number as the MAC Address,
determined by the rotary address dials on the UC400
controller. For example, if the rotary address dials are
set to 042, both the MAC Address and the BACnet
Device ID are 042.
•
It can be soft set using the Tracer TU service tool. If the
BACnet Device ID is set using the Tracer TU service
tool, the rotary address dials only affect the MAC
Address, they do not affect the BACnet Device ID.
Figure 65.
Connecting wires to terminal
Figure 66.
Setting rotary address dials
VAC
24
XFRM
BI
4
AO1
BI
5
AO2
UI
1
UI
2
P
1
P
2
C
NC
NO
BO3
C
NC
NO
BO2
C
NC
NO
BO1
RELAYS
ADDRESS
TRIAC SUPPLY
TRIACS
A
BO9
BO8
BO7
BO6
BO5
BO4
A
B
B
TX
RX
LINK IMC
SERVICE
SERVICE TOOL
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
BO1 BO2 BO3
BO4 BO5 BO6 BO7 BO8 BO9
1 2
3
45
67
8
9
0
x10
IMC
1
1
3
45
67
1 2
3
45
67
8
9
0
x100
8
9
0
x1
