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Figure 16, Communication Wiring
NOTE: A fourth chiller, Chiller D would be connected to chiller C same as chiller C to chiller B.
Table 11, Address DIP Switch Settings for Controllers Using pLAN.
Chiller
NOTES:
1. Up to four single or dual compressors can be interconnected.
2. The Operator Interface Touch Screen (OITS) setting is not a DIP switch setting. The OITS
3. Six Binary Switches: Up is 'On', indicated by '1'. Down is 'Off', indicated by '0'.
D-EIMWC00804-14EN
P
485
UCM
OPDR
C
B A
BLU/WHT
WHT/BLU
SHIELD
(+) (-)
J11 Port
UNIT CONTROL
Comp 1
(1)
Controller
Controller
1
A
100000
9
B
100100
17
C
100010
25
D
100110
address is selected by selecting the 'service' set screen. Then, with the Technician level
password active, select the 'pLAN Comm' button. Buttons A(7), B(15), C(23), D(31) will
appear in the middle of the screen, then select the letter for the OITS address for the chiller
that it is on. Then close the screen. Note that A is the default setting from the factory.
Centrifugal Chillers
J10
P
PORT
J11 PORT
UNIT CONTROL
Comp 2
Unit
Controller
2
5
010000
101000
10
13
010100
101100
18
21
010010
101010
26
29
010110
101110
PIGTAIL
P
P
485
UCM
OPDR
A
C
B
UNIT CONTROL
BLU/WHT
WHT/BLU
SHIELD
Chiller B
(-)
(+)
Chiller C
Operator
Reserved
Interface (2)
6
7
011000
111000
14
15
011100
111100
22
23
011010
111010
30
31
011110
111110
Chiller A
J10 J11
Reserved
8
000100
16
000010
24
000110
32
000001
35
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