4.12.5 Electrical Accessories - Siemens Acvatix SAX Series Basic Documentation

Auxiliary switch
ASC10.51
Application example:
Potentiometer
ASZ7.5/..
Flow characteristic
ASZ7.5/135
101 Ohm at n ominal stroke/
angular rotation
R = 0 + 1.01 Ohm x nominal
stroke/nominal angular rotatio
R = 0 + 5.03 Ohm x stroke (mm)
SAX..
R = 0 + 1.06 Ohm x rotary angle (°)
SAL..
48 / 60
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Building Technologies

4.12.5 Electrical accessories

The auxiliary switch ASC10.51 switches on or off when a certain position is
reached. The switching point can be set between 0...100%.
Switching point for S1–S2 and
S1–S3 cannot be set separately.
If S1–S2 is open then S1–S3 is
closed.
W hen using an auxiliary switch, position feedback can trigger an automatic stop of
the circulating pump in the end position "Fully closed".
Potentiometer ASZ7.5/.. (1000 Ω, 200 Ω,
135 Ω) delivers an ohmic value to the
controller giving the exact position of th
actuator (continuous position feedback). A
slip clutch prevents damage to the potentio
meter in the mechanical end positions. This
is also used for accurate balancing of the
potentiometer in the fully closed position.
The end values of the potentiometers refer to the maximum stroke / maximum
angular rotation of the actuators. For this reason, the resulting values in operati
deviate, depending on the type of valve used in combination with the actuator. The
potentiometer's starting point can be very accurately adjusted during installation
(refer page 25).
nominal 149 Ohm at n
angular rotation
R = 0 + 1.49 Ohm x nominal
n (%) stroke/nominal angular rotatio
R = 0 + 7.46 Ohm x stroke (mm)
R = 0 + 1.57 Ohm x rotary angle (°)
Actuator position in relation to nominal stroke/nominal angular rotat n [%]
Actuators SAX.., SAL.. for valves
Functions and control
e
-
Ohmic value between P2-P1 increases
with stroke H or rotation, ohmic value
between P2-P3 decreases.
ASZ7.5/200
ominal stroke/ nominal
n (%)
Adjustable switching point
ASZ7.5/1000
746 Ohm at nominal stroke/ nominal
angular rotation
R = 0 + 7.46 Ohm x nominal
stroke/nominal angular rotatio
R = 0 + 37.3 Ohm x stroke (mm)
R = 0 + 7.84 Ohm x rotary angle (°)
io
CE1P4040en
on
n (%)
22.12.2010