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YF – Function
no function fully open closed
Connections Transfer
Forced control input
YF
5/14
Siemens Modulating control valves with magnetic actuators, PN16 CA1N4455en
Building Technologies 2012-10-23
X
G0
Y
YM
X
G
Y
X
YF
G0
G
Y
YM
G
YF
YM
YF
G0
4455Z10
100 %
0 %
Y
0 % 100 %
100 %
0 %
Y
0 % 100 %
Y
0 % 100 %
100 %
0 %
A AB
A ABA AB
V
V V
Function
• YF not connected
• valve will follow the Y-signal
• YF connected to G
• valve will fully open control
path A  AB
• YF connected to G0
• valve will close control path
A  AB
S
ignal priority 1.
Hand wheel position MANUAL (open) or OFF (close)
2. Forced control signal YF
3. Signal input Y
The MX..461.. and MX..461..P magnetic valves are
factory-calibrated at 0 % and 100 % stroke.
When commissioning the valves, however,
(especially under extreme conditions of use) there
may still be some leakage via control path A → AB
with a 0 % stroke control signal (DC 0 V, DC 2 V or
DC 4 mA).
In this case, the valve can be recalibrated simply
and quickly:
1. Hand wheel [2] in AUTO-position
2. Use a pointed implement (ø 2 mm) to operate the
button in the opening [3] once
3. While recalibration is in progress, the LED [5] is
flashing green for approximately 10 seconds.
The valve will be briefly closed and fully opened.
If the electronics module is replaced, the valve’s
electronics must be recalibrated. For that, the hand
wheel must be set to AUTO.
Calibration