Communication Interfaces; Rotary Switches; Led Description And Operation - Trane Ascend ACS 140 Installation, Operation And Maintenance Manual

Figure 20. UC800 wiring locations and connection
ports
2 3 4 5
6
1 1 1
1. Rotary Switches for setting BACnet® MAC address
or MODBUS® ID.
2. LINK for BACnet® MS/TP, or MODBUS® Slave (two
terminals, ±). Field wired if used.
3. LINK for BACnet® MS/TP, or MODBUS® Slave (two
terminals, ±). Field wired if used.
4. Machine bus for existing machine LLIDs (IPC3
Tracer bus). IPC3 Bus: used for LonTalk® using LCI-
C.
AC-SVX002D-EN
6
7
8
9 9 9
0 0 0
- - -
0
-
5. Power (210 mA at 24 Vdc) and ground terminations
(same bus as Item 4). Factory wired.
6. Modbus connection to AFD.
7. Marquee LED power and UC800 Status indicator
(refer to the table in "LED Description and
Operation," p. 45).
8. Status LEDs for the BAS link, MBus link, and IMC
link.
9. USB device Type B connection for the service tool
(Tracer® TU).
10. The Ethernet connection can only be used with the
Tracer® AdaptiView™ display.
11. USB Host (not used).

Communication Interfaces

There are four connections on the UC800 that support
the communication interfaces listed. Refer to the figure
in "Wiring and Port Descriptions," p. 44
locations of each of these ports.
• BACnet® MS/TP
• MODBUS® Slave
• LonTalk® using LCI-C (from the IPC3 bus)

Rotary Switches

There are three rotary switches on the front of the
UC800 controller. Use these switches to define a three-
digit address when the UC800 is installed in a BACnet®
or MODBUS® system (e.g., 107, 127, etc.).
N N o o t t e e : : Valid addresses are 001 to 127 for BACnet® and
001 to 247 for MODBUS®.

LED Description and Operation

There are ten LEDs on the front of the UC800. The
following figure shows the locations of each LED and
the following table describes their behavior in specific
instances.
C C o o n n t t r r o o l l s s
for the
45