Installation Instructions

CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
19 EN0B-0085 IE10 R0420
CONNECTION VIA RS485 INTERFACE 4
Fig. 10. Connection (L > 3 m) of RS485 interface 4 to a Panel Bus
NOTES:
— * The 24V~ and 24V0 terminals at RS485-4 Interface have an automatic resetting fuse protection. For more
information, see “Wireless Connectivity” section on page 15.
— N = max. 16 modules.
— For communication cable lengths, transmission speeds, and termination see “General Information on the
RS485 Standard” section on page 7. For fusing, see “Fusing” section on page 11.
C
Panel Bus
I/O Module #1
FGND
R
T
110VAC/230VAC
24VAC
Panel Bus
I/O Module #N
F1
71
72
73
74
75
76
77
78
71
72
73
74
75
76
77
78
R
T
A+C = MAX.30 Meters
24VAC
A
L > 3m
24V~
24V0
FGND
GND
0
F2
110VAC/230VAC
TX
5V
GND
Isolaon
Barrier
RX
5V_ISO
-
+
GND_ISO
RS485-
RS485+
*
*
~
CPO-PC400-W/CPO-PC400-UW