4
“pCO compact” +050003343 - 1.3 - 12.09.2016
ENG
1.2 Installation
Mechanical fastening
The pCO compact is installed on a DIN rail. To fasten the unit to the DIN rail, press it lightly against the rail. The rear tabs will click
into place, locking the unit to the rail. Removing the unit is just as simple, using a screwdriver through the release slot to lever
and lift the tabs. The tabs are kept in the locked position by springs.
1.3 Power supply
The power supply is connected between G and G0, with G0 clamp connected to earth (PE). For AC installation, use a 30 VA
class II safety transformer, output voltage 24 Vac, supplying one pCO compact controller only.
If supplying multiple pCO compact controllers with the same transformer, the rated power of the latter must be n x 30 VA,
where “n” is the number of controllers being supplied by the transformer, regardless of the version of controller.
• The power supply to the pCO compact controller and terminal (or series of pCO compact controllers and terminals)
should be separate from the power supply to the other electrical devices (contactors and other electromechanical
components) inside the electrical panel.
• A 250 V (5x20) 800 mAT fuse must be installed in the power supply line of the controller and a 50 mAT - 250 V (5x20) must
be installed in the power supply of SYNC clamp (only for 48 Vdc power supply). The power supply is functionally
insulated from the rest of the I/O circuit, including the serial connections.
• The power cable should be wound twice around a ferrite (i.e. KITAGAWA part no. RI 18-28-10 - CAREL code 0907877AXX).
• The synchronicity line (SYNC) must be supplied by a class 2 safety transformer with 24 Vac output using the two pins on
terminal “J2” called SYNC.
If the controller has a 24 Vac power supply, this can also be used to supply the SYNC signal. It is necessary to follow exactly
the wiring connection in fig. 4.b.
If, on the other hand, the controller has a DC power supply 48 Vdc (36 Vmin…72 Vmax), the SYNC connection must be
supplied by a special transformer (at least 1 VA) connecting the 24 Vac output to the two SYNC pin. In this case, it
must be protected by a 250 V 50 mAT fuse (follow the Fig. 4.c).
• To make the power supply connection to terminal J1, use a cable with a minimum cross-section of 1mm
2
.
1.4 BMS serial options
item code description
1 Modbus®/CAREL RS485 PCOS004850 opto-isolated RS485 serial
2 LON PCO10000F0 LON FTT10 serial
3 Ethernet™ BACnet™ / SNMP /Modbus® PCO1000WB0 Ethernet™ serial
4 BACnet™ RS485 PCO1000BA0 BACnet™ MS/TP 485 serial
5 RS232 PCO100MDM0 RS232 serial
6 CANbus PCOS00HBB0 CANbus for slave serial port (BMS)
7 KONNEX PCOS00KXB0 KONNEX serial BMS port
Tab. 1.b
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