Carel srl: pCO Stage Controller
page 24
CONNECTION OF THE INPUTS
Digital inputs
•
from ID1 to ID10, 24V~ 50/60 Hz or 24 V
•
ID11 and ID12, 230V~ or 24V~ max. 50/60 Hz
24V
IDCMn
NC Contact
IDn
G0
G
AVSS o "-"
+24
24V~
Fig. 19 (for pCO terminal block, see Fig. 18)
Note: do not connect any additional devices to the inputs Idn (e.g. relay coils for remoting the signal to other
instruments).
The pressure switch of the general high pressure/antifreeze must be connected in series to all the other lock
contacts of the circuit 1 devices, partializations included (see
Fig. 30
). Unlike the other device lock contacts,
the contact of the device no. 11 is either 230 Vac or 24 Vac; therefore it can not be connected in series to the
pressure switch of high general pressure / antifreeze. The device no. 11 is locked however by general high
pressure switch / antifreeze (see
Fig. 30
).
Analog inputs
•
from B1 to B4 for probes NTC Carel
•
B5 and B6 for active-voltage probes (0÷1V
) or current probes (4÷20 mA) selectable by jumper
Types of probes that can be connected to the analog inputs
Output active temperature probes (3-wire probes)
Temperature NTC Carel probes (2-wire probes)
NTC Carel Probe
AVSS
Bn
pCO terminal block
Fig. 21
The two cables of the NTC probes are equivalent because they have no polarity. Therefore it is not necessary to
comply with a special order when connecting them to the terminal block.
Pressure probes (2-wire probes)
+24(J1-2)
Bn
pCO terminal block
SPKn000000 probe
Fig. 22
Note: at the te24 a maximum of 80 mA is available.
Configuration of the B5 and B6 analog inputs
ID11R
Contact NC
ID11
230V~
+24 (J1/2)
Bn
AVSS
pCO terminal block
Probe contact
a
c
b
7
+
7
8
H
11
9
M
9
Fig. 20
NOTE: the +24 terminal can supply max. 80mA.
Temperature Probes
SST00A00/1 (a)
SST00A0420 (a)
Temperature NTC C.AR.EL. probes
NTC0150000
NTC0350000
NTC015W000
NTC030W000
NTC060W000
NTC0600A00
NTC120W000
SSWNTC0000
SSDNTC0000
Pressure probes
SPK1000000 (-0.5÷7bar)
SPK2500000 (0÷25bar)
SPK3000000 (0÷30bar)
Bn
⇒
White wire = pressure active output
+24 Vdc
⇒
Brown wire = power supply