11
2 - Electrical connections
2.3.1 POWER SUPPLY
B
Switching power supply with mul-
tiple isolation and internal fuse
• Standard version:
nominal voltage:
100 - 240V~ (- 15% + 10%)
Frequency 50/60Hz
• Low Voltage version:
Nominal voltage:
24V
~ (- 25% + 12%)
Frequency 50/60Hz
or 24V– (- 15% + 25%)
• Power consumption 2.6W max
2.3.2 PV CONTROL INPUT
B
A For L-J-K-S-T thermocouple type
• Connect the wires with the
polarity as shown
• Use always compensation cable
of the correct type for the ther-
mocouple used
• The shield, if present, must be
connected to a proper earth.
B For Pt100 resistance
thermometer
• If a 3 wires system is used, use
always cables of the same diam-
eter (1mm
2
min.) (line 20 Ω/lead
maximum resistance)
• When using a 2 wires system, use
always cables of the same diam-
eter (1,5mm
2
min.) and put a
jumper between terminals 5 and 6
C For ∆T (2x RTD Pt100) Special
A When the distance between
the controller and the sensor
is 15 mt. using a cable of 1.5
mm
2
diameter, produces an
error on the measure of 1°C.
R1 + R2 must be <320Ω
wire resistance
150Ω max
For 3 wires only
20 Ω/lead maxi-
mum resistance
Use wires of the
same length and
1.5 mm
2
size.
20 Ω/lead maxi-
mum resistance.
