Phoenix Contact QUINT4-PS/12-24DC/24DC/1.3/SC Manual page 19

7.4 Block diagram
Figure 6 Block diagram
1.1
+
1.2
-
Key
Symbol Designation
Surge protection (diode) with filter
Inrush current limitation
Switching transistor and main transmitter
(electrically isolating)
Secondary rectification and smoothing
Filter
Optocoupler (electrically isolating)
Additional regulatory protection against
surge voltage
OVP
110257_en_00
OVP
SIG
C
Symbol Designation
Auxiliary converter (electrically isolating)
Microcontroller
C
PNP transistor switch output
Rotary selector switch
SIG
Signal/display LEDs
Potentiometer output voltage
QUINT4-PS/12-24DC/24DC/1.3/SC
2.1
+
2.2
-
2.3
-
3.1
SIG
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