Power Supply; Pv Control Unit - ascon M3 Series User Manual

2.3.1 POWER SUPPLY

Switching power supply with mul-
tiple isolation and internal PTC
• 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
included PTC
L
1
Supply
2
N
B
2.3.2 PV CONTROL INPUT
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-
min.) (line 20 Ω/lead
eter (1mm 2
maximum resistance)
• When using a 2 wires system, use
always cables of the same diam-
eter (1,5mm 2
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
(1°F).
R1 + R2 must be <320Ω
min.) and put a
R1
R2
2 - Electrical connections
B
5
6
wire resistance
150Ω max
5
B
For 3 wires only
6
b
Maximum
resistance/line 20 Ω
12
A
5
A
Use wires of the
same length and
6
B
2
1.5 mm size.
Maximum
12
resistance/line 20 Ω
A
11