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CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
EN0B-0085 IE10 R0420
18
CONNECTION EXAMPLES
Connection to Panel Bus I/O Modules Powered by a Separate Transformer
This configuration has the advantage of allowing the CPO-PC400-W/CPO-PC400-UW and the Panel Bus I/O modules to
be installed in (several) different wiring cabinets – as long as the max. permissible length of A + C ≤ 3 m is maintained.
This same configuration can also be extended, with multiple transformers powering Panel Bus I/O modules installed in
multiple wiring cabinets for a total of max. 16 Panel Bus I/O modules.
CONNECTION VIA RS485 INTERFACES 1, 2, OR 3
Fig. 9. Connection (L > 3m) of RS485 interfaces 1, 2, or 3 (RS485 interface 1 shown) to a Panel Bus
TX
5V
GND
Panel Bus
I/O Module #1
Isolaon
Barrier
RX
5V_ISO
GND_ISO
R
S
485+
R
S
485-
R
T
110VAC/230VAC
24VAC
Panel Bus
I/O Module #N
24VAC
110VAC/230VAC
F1
F2
71
72
73
75
76
77
78
71
72
73
74
75
76
77
78
L > 3m
C
A
A+C = MAX.30 Meters
CPO-PC400-W/CPO-PC400-UW
24V~
24V0
FG
N
D
CH1+
CH1-
GND1
74
R
T