Siemens SQX82.03U Teknik Talimatlar - Sayfa 4

Kontrolör Siemens SQX82.03U için çevrimiçi göz atın veya pdf Teknik Talimatlar indirin. Siemens SQX82.03U 8 sayfaları. Sax electronic valve actuator. non-spring return, 24 vac, 3-position control.

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Siemens SQX82.03U Teknik Talimatlar
Technical Instructions
Document Number 155-507
April 5, 2012
Components

Operation

Page 4
The actuator accepts a 24 Vac control signal to Y1, which causes the actuator's stem
retainer to move toward the valve (extend). A 24 Vac control signal to Y2 causes the
actuator's stem retainer to move toward the actuator (retract). The stroke travel is
proportional to the length of time the signal is applied.
When power is turned off or in the event of a power failure, the actuator maintains its
position.
In the 3-position (floating) actuators, deviation occurs (See Figure 1):
• after several positioning signals Y1 and Y2 in the same direction since the stroke
movement starts with a delay of 50 ms.
• when positioning signals Y1 and Y2 are active for less than 50 ms since the stroke
movement cannot be made in that case.
A
B
Calculated
Actual
position
position
Accurate position feedback is made possible with the help of a potentiometer.
Figure 1. Three-position (Floating) Actuator Deviation.
Flowrite™ 599 Series SAX Electronic Valve Actuator
Non-spring Return, 24 Vac 3-position (Floating) Control
Manual adjuster (with slide switch)
A
Wiring knockouts
B
Position indication
C
Status indication (SAX61.03U only)
D
Housing cover
E
Valve stem coupling
F
Yoke
G
Valve neck coupling
H
C
Y1
Positioning
Positioning signals
time [ms]
(power applied)
Y2
0
No power
applied
Siemens Industry, Inc.