428546-YIM-C-1110
YCCS System Manager and Zone Coordinator Installation Instructions
8
Communication Bus
Determining the System Manager Address Switch
The System Manager address switch is always set to 0;
therefore, you do
not
need to determine the System
Manager address.
Determining the Zone Coordinator Bus Address
The Bus address switch sets a unique address for this
controller on the System Communication Bus. The
default address setting is 255 (all ON). You must change
the default address.
Set consecutive addresses 8-17 for Zone Coordinator on
the System Communication Bus. Use sequential
addressing with no gaps in the device address range to
ensure best Bus performance. Table 5 and Figure 7 show
System Communication Bus address switch settings.
Powering On the System Manager and Zone
Coordinator
After applying 24 VAC power, the controllers require
approximately 2 minutes to start up and become
operational. Startup is completed and the controllers are
operational when the home screen appears. The green
RUN LED appears and is on steady.
Disconnecting Power from the System Manager
and Zone Coordinator
The System Manager and Zone Coordinator have no
backup battery power. When the 24 VAC power supply is
disconnected or lost, the controllers are nonoperational.
End-of-Line (EOL) Terminations
Daisy-chained RS485 protocol networks require End-of-
Line (EOL) termination to reduce interference.
Interference is caused by signal reflection that occurs
when data transmissions reach the end of a bus segment
and bounce back (Figure 8). The high baud rates on
Master-Slave/Token-Passing (MS/TP) bus applications
require robust EOL termination and strict adherence to
the EOL termination rules.
Figure 6: Zone Coordinator
Address Switch Detail
8 7 6 5 4 3 2 1
ON
OFF
Front
View from bottom of
Zone Coordinator
Address Switch 255
(All switches shown in
OFF position)
12
8
64
32
16
8
4
2
1
FI
G:Z
C
_sw
tc
h
Figure 7: Zone Coordinator
Address Switch Settings
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 8
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
12
8
Address 9
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 10
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
12
8
Address 11
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 12
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 13
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
12
8
Address 14
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 15
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 16
8 7 6 5 4 3 2 1
ON
OFF
1
2
4
8
16
32
64
128
Address 17
F
IG:
Z
C
_s
w
tc
h_s
et
s
Table 5: System Communication Bus Address
Summary
Address
Description
8–17
Zone Coordinator on the System
Communication Bus
IMPORTANT:
Wait for the controller to complete
the startup sequence and the RUN LED to appear
before initiating other actions.
No EOL = No Signal Cushioning
(Bounce Back and Noise)
No
EOL
EOL
EOL Provides Signal
Cushioning (No Bounce Back)
FI
G
:in
tr
fr
nc
Figure 8: Interference
