Installation Instructions

CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
31 EN0B-0085 IE10 R0420
Connection to a CP-IO Bus Powered by a Same Transformer
Fig. 22. Connection (L < 3 m) of RS485 interface 4 to a CP-IO 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.
— NOTES: N = max. 9 modules. The mode switch of the integrated termination resistor of the final CP-DIO (CP-
DIO #N) must be set to “ON.” If the last module is CP-EXPIO, the end of line resistor must be included.
— For communication cable lengths, transmission speeds, and termination, see “General Information on the
RS485 Standard” section on page 7. For capacity restrictions, see “Connection to CP-IO Bus” section on
page 10. For fusing, see “Fusing” section on page 11.
CP-DIO/EXPIO #1
110VAC/230VAC
24VAC
F1
FGND
24V0
24V~
L < 3m
CP-DIO/EXPIO #N
FGND
485-
485+
N24 VAC
S24 VAC
FGND
FGND
485-
485+
N24 VAC
S24 VAC
FGND
R T
R T
TX
5V
GND
Isolaon
Barrier
RX
5V_ISO
~
0
-
+
GND_ISO
RS485-
RS485+
FGND
GND
CPO-PC400-W/CPO-PC400-UW