Installation Instructions

CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
EN0B-0085 IE10 R0420 30
Connection to a CP-IO Bus Powered by the Separate Transformer
Fig. 21. Connection (L > 3 m) of RS485 interface 4 to a CP-IO Bus
NOTES:
— N = max. 16 CP-EXPIO modules or 16 CP-DIO modules (or a mixture thereof). The mode switch of the inte-
grated termination resistor of the final CP-DIO (CP-DIO #N) must be set to “ON.” The CP-EXPIO module sup-
ports the addressing from address 0 to 15. Therefore, it supports 16 modules per channel. 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
R T
110VAC/230VAC
24VAC
F1
L > 3m
CP-DIO/EXPIO #N
24VAC
F2
110VAC/230VAC
FGND
485-
485+
N24 VAC
S24 VAC
FGND
24V0 24V~
FGND
FGND
485-
485+
N24 VAC
S24 VAC
FGND
R T
TX
5V
GND
Isolaon
Barrier
RX
5V_ISO
-
+
GND_ISO
RS485-
RS485+
*
~
0
*
FGND
GND
CPO-PC400-W/CPO-PC400-UW