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+05C003290 - 1.5 - 09.09.2008
GENERAL CHARACTERISTICS
pCO
3
is a microprocessor-based electronic controller compatible in both hardware and software terms with
the pCO
2
family. Developed by REHAU in compliance with the European RoHS directives, it provides a solution
for many applications in the air-conditioning and refrigeration sectors. It ensures absolute versatility, allowing
specific products to be created to customer request.
pCO
3
runs the control program, and is fitted with the set of terminals required for connection to the devices
(compressors, fans…). The program and the parameters are saved to FLASH-MEMORY and E
2
prom, ensuring they
are stored even in the event of power failures (without requiring a backup battery).
The program can be loaded using a PC (28.8 kbps and 115.2 kbps) or the special programming key.
pCO
3
also allows connection to the pLAN (pCO Local Area Network) and can be connected, as well as to
other pCO
3
controllers, to all the other controllers in the pCO sistema and all the pGD family terminals. All the
controllers in the pLAN can exchange information (variables, digital or analogue, depending on the application
software used) at high transmission speed. Up to 32 units can be connected, including pCO controllers and
terminals, so as to share the information effectively.
The connection to the supervisor/telemaintenance serial line, via the REHAU or Modbus™ communication
protocol over the RS485 standard, is performed by inserting an optional serial board in the pCO
3
.
Other optional cards can be used to connect to a supervisor via standards other than RS485. Finally, the serial
field bus interface, using the optional board, ensures connection to the field devices controlled (for example:
valves, pCOe I/O expansions, electronic valve drivers...).
Versions available:
• SMALL, MEDIUM, LARGE, EXTRALARGE N.O. and EXTRALARGE N.C.;
• with or without Built-In terminal;
• with additional flash memory and optically-isolated pLAN;
• with or without solid state relay (SSR) digital outputs.
Note: the application software can be downloaded to the flash memory using the smart key PCOS00AKY0, see
Fig. 6; or a PC using the USB-485 adapter “CVSTDUTLF0” and the “WINLOAD32” program, to be ordered from
REHAU.
Power supply
A Class II safety transformer with a minimum rating of 50 VA must be used in the installation to supply
just one pCO
3
controller. The power supply to the µ pCO
3
controller and terminal (or pCO
3
controllers and
terminals) should be separated from the power supply to the other electrical devices (contactors and other
electromechanical components) inside the electrical panel. If the secondary of the transformer is earthed, make
sure that the earth wire is connected to terminal G0. This is true for all the devices connected to the pCO
3
. If
powering more than one pCO
3
board connected in the pLAN network, make sure that the references G and G0
are observed (the reference G0 must be maintained for all the boards).
If using the pLAN network and for further explanations and information, please refer to the REHAU manual pCO
3
.
Field Bus options
optically isolated 485 PCO100FD10
tLAN
PCO100TLN0
Belimo MPbus
PCO100MPB0
modem
PCOS00FD20
CAN hydronic
PCOS00HBF0
BMS options
CANbus
PCOS00HBB0
485/Modbus
PCOS004850
modem
PCO100MDM0
Ethernet board
PCO1000WB0
LonWorks
LonWorks
FTT10
PCO10000F0
LonWorks
FTT10
standard chiller profile
PCO10001F0
english