EVCO S.p.A. c-pro 3 | Hardware manual ver. 2.0 | Code 114CP3E204
page 35 of 86
ANALOG INPUTS
Analog inputs.
Each analog input is configurable via configuration parameter for PTC / NTC / Pt 1000 probes / 0-20 mA / 4-20 mA / 0-5 V ratiometric /
0-10 V transducers.
Terminal Meaning
AI1 analog input 1
AI2 analog input 2
AI3 analog input 3
GND ground
+5V power supply 0-5 V ratiometric transducers (5 VDC, 40 mA max.)
+24V power supply 0-20 mA / 4-20 mA / 0-10 V transducers (24 VDC, 120 mA max.)
The maximum length of the connecting cables of the analog inputs and the one of the power supply of the transducers is
100 m (328 ft).
The expansion incorporates a restorable thermal protection of the power supplies against the short circuit and the overload.
For the settings about the analog inputs look at chapter 6 “CONFIGURATION”.
PROG
Port to update the firmware of the instrument.
POWER SUPPLY
Power supply.
Terminal Meaning
V≅
power supply expansion (24 VAC / 20... 40 VDC)
V≅
power supply expansion (24 VAC / 20... 40 VDC)
The maximum length of the connecting cables of the power supply of the expansion is 30 m (98 ft).
Protect the power supply with a fuse rated 0.8A-T 250 V.
If the expansion is powered in direct current, one will not have to respect the polarity of the power supply voltage.
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