Cashco Siemens PS2 I/P - Manual (Page 24)

Design and Functional Principle
24
SIPART PS2 Manual
A5E00074631-01
A
D
A
D
1
3 V
I W+
I
W-
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A1 A2
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+ y
U
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Zuluft
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Abluft
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p
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Abluft
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p
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A1 A2
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I I
HART
BE1
Micro-
controller
BE2
+24 V
+5 V
Exhaust air
Exhaust
air
Supply air
stroke
stroke
1 Motherboard with microcontroller and input circuit
2 Control panel with LC-display and momentary action switch
3 Piezo--valve unit, always built--in
4 Valve unit with double action positioner always built--in
5 Iy-module for positioner SIPART PS2
6 Alarm module for three alarm outputs and one digital input
7 SIA-module (Slot Initiator-Alarm-module)
8 Spring--loaded pneumatic actuator (single action)
9 Spring--loaded pneumatic actuator (double action)
Figure 2-9 Block diagram of the electro--pneumatic positioner, functional diagram
.
NOTE
Alarm module (6) and SIA module (7) can only be used alternatively.