Power Supply - Trane UniTrane Installation, Operation And Maintenance Manual

BACnet Device ID
The BACnet Device ID is required by the BACnet network.
Each device must have a unique number from 001 to
4094302.
Figure 66. BACnet device ID
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-B 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.
BACnet networks with a Tracer® SC system
controller
On BACnet networks with a Tracer® SC system controller,
the Device ID for the UC400-B controller is always soft set
by the system controller using the following scheme
illustrated below.
Note: The BACnet Device ID is displayed as the Software
Device ID on the Tracer® TU Controller Settings
page in the Protocol group.
Figure 67 shows an example of BACnet link wiring with
multiple UC400-B controllers.
UNT-SVX07J-EN
Figure 67. Example of BACnet link wiring with multiple
UC400-B controllers
4 3 2 1
+
BACnet
Trane
BACnet
Terminator
Tracer SC UC400-B
Zone Sensor

Power Supply

Please read all of the warnings, cautions, and notices
below before proceeding with this section.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
CAUTION
Personal Injury and Equipment Damage!
After installation, make sure to check that the 24 Vac
transformer is grounded through the controller. Failure
to check could result in personal injury and/or damage
to equipment. Measure the voltage between chassis
ground and any ground terminal on the UC400-B
controller. Expected result: Vac £ 4.0 V
NOTICE:
Avoid Equipment Damage!
Sharing 24 Vac power between controllers could cause
equipment damage.
A separate transformer is recommended for each UC400-
B controller. The line input to the transformer must be
equipped with a circuit breaker sized to handle the
maximum transformer line current.
If a single transformer is shared by multiple UC400-B
controllers:
• The transformer must have sufficient capacity.
• Polarity must be maintained for every UC400-B
controller powered by the transformer.
Installation - Controllers
1 2 3 4
4 3 2 1 4 3 2 1 1 2 3 4 3 2 1 2 3 4
4 3 2 1 4 1
24VDC Gnd 24VDC Gnd
24VDC Gnd
1 2 3 4 BACnet BACnet
1 2 3 4 1 2 3 4
IMC IMC IMC
UC400-B UC400-B
Zone Sensor Zone Sensor
4 3 2 1
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87