Pneumatic Connections M; Safety-Position - Siemens SIPART PS2 Zusatzbeschreibung

2.2.3 Pneumatic Connections
2.2.3.1Safety position
1. Single acting actuator with spring above
spring
up
down
up
2. Single acting actuator with spring below, outlet air points to below
spring
up
down
up
SIPART PS2 Zusatzbeschreibung
A5E00245544-03
see M-chapter-2.2.3
see M-chapter-2.2.3
The positioner goes after electrical or pneumatic power failure in a
defined safety position.
If communication fails a safety position is programmable.
Also if position feedback signal fails the positioner goes in a safety
position.
Two cases have to be distinguished
Outlet air
down
Outlet air
down
Zusatzbeschreibung/ Additional Specification
loss of
electric power
supply pressure
set point signal
position feedback signal
for 2. YAGL
loss of
electric power
supply pressure
set point signal
position feedback signal
for 2. YAGL
fail safe position
down
down
programmable
up down
33° 90°
fail safe position
up
up
programmable
up down
33° 90°
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