Honeywell ComfortPoint Open CPO-PC400-W Manual page 21

CONNECTION VIA RS485 INTERFACE 4
CPO-PC400-W/CPO-PC400-UW
Isola on
Barrier
GND
RS485-
RX
TX RS485+
5V
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.
110VAC/230VAC
24VAC
A
F1
*
~
*
0
FGND
GND_ISO
GND
-
R
T
+
5V_ISO
Fig. 12. Connection (A + C < 3 m) of RS485 interface 4 to a Panel Bus
CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
I/O Module #1
71
72
73
74
A+C = MAX.3 Meters
21
Panel Bus
Panel Bus
I/O Module #N
75 71
76 72
77 73
78 74
C
EN0B-0085 IE10 R0420
75
R
76 T
77
78