Siemens Acvatix SAX Series User Manual

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Siemens Actuators SAX.., SAY.., SAV.., SAL.. for valves CE1P4040en
Building Technologies Functions and control 2018-12-05
4.5 Acting direction and flow characteristic
The selection of changeover of acting direction and characteristic with the DIL
switches of the function module AZX61.1 depends on the type of actuator (with or
without fail safe function) and the associated type of valve (valve characteristic,
push to open, pull to open).
When the positioning signal increases (DC 0…10 V, DC 4…20 mA, 0...1000 Ω), the
objective is to have the valve’s volumetric flow V rising, but to fully open the valve,
V = 100% (NO = normally open), or to fully close it, V = 0% (NC = normally closed)
in the event of a power failure.
DIL
switches
Acting
direction
Direct Reverse
Flow
characteristic
Linear
Equal-
percentage
Linear
Equal-
percentage
Without fail
safe
function
No power
applied
Maintains the position
4.6 Position Feedback U
The position feedback U (DC 0...10 V) is always proportional to stroke H of the
actuator’s stem.
Actuator
Positioning signal Y, Z
Actuator
Position feedback U
log = equal-
percentage
lin = linear

Siemens Acvatix SAX Series Specifications

General

Brand	Siemens
Model	Acvatix SAX Series
Category	Controller
Language	English