CPO-PC400-W/CPO-PC400-UW HVAC CONTROLLER
9 EN0B-0085 IE10 R0420
A max. of 16 Panel Bus I/O modules can be connected to 
one Panel Bus. The current consumption of the individual 
Panel Bus I/O modules varies according to model. For 
more information on Panel Bus I/O modules, see 
“Technical Literature” section on page 40. 
Connection to BACnet MSTP Bus 
The CPO-PC400-W/CPO-PC400-UW can communicate 
with other controllers, e.g., CPO Unitary Controllers, CPO-
VAV2A, CP-VAV, CPO-R Series, CP-SPC, and CPO-DIO 
through BACnet MSTP Buses.
The current consumption of the individual BACnet Bus 
devices varies according to model. For more information on 
BACnet Bus devices, see “Technical Literature” section on 
page 40.
Connection to Field Buses 
The CPO-PC400-W/CPO-PC400-UW can communicate 
with ComfortPoint
TM 
Open Field Bus Adapters.
There are four ComfortPoint
TM
 Open Field Bus Adapters to 
choose from (see Table 15 on page 9).
Fig. 2. CPO-FBA Dimensions (mm)
A max. of 31 FBAs can be connected to one Field Bus. Each 
CPO-FBA-1A has a current consumption of 213 mA. The 
total current consumption of the max. number of FBAs per 
Field Bus thus amounts to 31 x 213 mA = 6603 mA. 
Fusing: See “Fusing” section on page 11. 
For more information on Field Bus Adapters, see “Technical 
Literature” section on page 40
Connection to Modbus RTU 
The CPO-PC400-W/CPO-PC400-UW can communicate 
with power meters, and NXL Inverters through Modbus. 
Fusing: See “Fusing” section on page 11. 
The current consumption of the individual Modbus devices 
varies according to model. For more information on 
Modbus devices, see “Technical Literature” section on 
page 40.
XF824  Pluggable 
RO 
module 
–  6(b)  –  6 
XFR824  Pluggable 
RO 
module 
–  6(b)  6  6 
XFR825  Pluggable 
floating 
output 
module 
–  3  3  3 
pairs 
CPO-IO830A/
XF830A/
XFU830A
Mixed I/O 
module 
20  14  –  18 
(a) In addition to Ring LED and Service LED
(b) Changeover outputs 
Table 14. Panel I/O modules
Name
Descripti
on
Input
Output
Manual Overrides
Status LEDs (a)
Table 15. ComfortPoint
TM
 Open Field Bus Adapters
Model
Universal 
Inputs
Digital 
Outputs
Analog 
Outputs
CPO-FBA-1A  2  --  2 
CPO-FBA-2A  2  2   
CPO-FBA-3A  2  1  1 
CPO-FBA-4A  4  --  --