Carel c.pCO, User Manual, Page: 18 / 64

18
ENG
c.pCO sis tem a + 0300057EN re l. 1.2 - 29.05.2017
J3 Disp
+Vterm
L H
J4 FBus J5 CAN
J3 Disp J4 FBus J6 BMS
+Vterm
J3 Disp J4 FBus
J6 BMS
+Vterm
G G0 G G0 G G0
24 Vac
L N
230 Vac
24 Vac
L N
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G G0
J25 BMS2J26 FBus2
J11 pLAN
c.pCO
G
G0
Fig. 4.e
The procedure for earthing the shield is described in the corresponding
paragraph.
Case 2: multiple boards connected to a Master/Slave network powered
by different transformers (with G0 not earthed); this is a typical application
of multiple boards inside different electrical panels. If the network is more
than 100 m long, the 120 Ω, ¼ W terminating resistor is required.
J3 Disp
+Vterm
L H
J4 FBus J5 CAN J3 Disp J4 FBus J6 BMS
+Vterm
J3 Disp J4 FBus J6 BMS
+Vterm
G G0 G G0 G G0
230 Vac
24 Vac
L N
230 Vac
24 Vac
L N
230 Vac
24 Vac
L N
R = 1 20 Ω
R = 1 20 Ω
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G G0
230 Vac
24 Vac
L N
230 Vac
24 Vac
L N
230 Vac
24 Vac
L N
R = 1 20 Ω
R = 1 20 Ω
Fig. 4.f
Important: the earth connection (if any) should be made only on
one point of the earth line (same earthing terminal for all controllers).
The procedure for earthing the shield is described in the corresponding
paragraph.
O ptically-isolated serial port
This is the case of serial ONE - BMS1, serial TWO - Fieldbus 1 and the built-
in ports serials THREE and FOUR on optically-isolated models. Regardless
of the type of power supply or earthing, use a 3-wire shielded cable
connected as shown in the figure. If the network is more than 100 m
long, the terminating resistor is required.
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G
G0
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
G G0
R = 1 20 Ω
R = 1 20 Ω
Power
supply
Fig. 4.g
The procedure for earthing the shield is described in the corresponding
paragraph.
P rocedure for earthing the shield
The shield of the serial cable is earthed differently according to the
length, as shown in the figure (where A=FBus terminal, B=BMS terminal).
Case 1: distance between controllers less than 0.3 m: earth only one end
of the cable.
L < 300 mm
L < 300 mm
A B B
Fig. 4.h
Case 2: distance between controllers greater than 0.3 m: two possibilities.
- earth one end with a bridge between the shields
L > 300 mm
L > 300 mm
A B B
Fig. 4.i
- earth both ends of the cable (no bridge between shields).
L > 300 mm
L > 300 mm
A B B
Fig. 4.j