General Characteristics; Field Bus Options - Carel pCO3 Technical Leaflet

GENERAL CHARACTERISTICS

pCO is a microprocessor-based electronic controller compatible in both hardware and software terms with
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the pCO family. Developed by REHAU in compliance with the European RoHS directives, it provides a solution
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for many applications in the air-conditioning and refrigeration sectors. It ensures absolute versatility, allowing
specific products to be created to customer request.
pCO runs the control program, and is fitted with the set of terminals required for connection to the devices
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(compressors, fans...). The program and the parameters are saved to FLASH-MEMORY and E
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 also allows connection to the pLAN (pCO Local Area Network) and can be connected, as well as to
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other pCO controllers, to all the other controllers in the pCO sistema and all the pGD family terminals. All the
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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
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 controller. The power supply to the µ pCO
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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
powering more than one pCO
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

Field Bus options

optically isolated 485
tLAN
Belimo MPbus
modem
CAN hydronic
BMS options
CANbus PCOS00HBB0
485/Modbus PCOS004850
modem PCO100MDM0
Ethernet board PCO1000WB0
LonWorks
LonWorks
LonWorks
+05C003290 - 1.5 - 09.09.2008
board connected in the pLAN network, make sure that the references G and G0
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PCO100FD10
PCO100TLN0
PCO100MPB0
PCOS00FD20
PCOS00HBF0
FTT10
FTT10
standard chiller profile
controller and terminal (or pCO
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PCO10000F0
PCO10001F0
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prom, ensuring they
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.
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controllers and
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. If
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english
.
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