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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
FG
N
D
485-
485+
N24 V
A
C
S24 V
A
C
FG
N
D
24V0
24V~
FG
N
D
FG
N
D
485-
485+
N24 V
A
C
S24 V
A
C
FG
N
D
R
T
TX
5V
GND
Isolaon
Barrier
RX
5V_ISO
-
+
GND_ISO
RS485-
RS485+
*
~
0
*
FGND
GND
CPO-PC400-W/CPO-PC400-UW