EN0B-0808GE02R0999
ML7421A,B
Electric Linear ValveActuators
GENERAL
TheML7421A,BElectric Linear ValveActuators permit
modulating control on the basis of an analog output. The
direction of movement is reversible bymeans of an internal
selector plug.
They operateHoneywell’s standard valves in heating, venti-
lation, and air conditioning (HVAC) applications.
FEATURES
•
Easyandquick installation
•
No separate linkage required
•
No adjustments
•
Force limiting end switches
•
Manual operator
•
Synchronousmotor
•
Corrosion resistant design
•
Selectable 0...10Vdcor 2...10Vdc/
0...20mAor 4...20mA input signal
•
Position feedback signal
•
Direct or reverse acting adjustable
•
Strokepositionon signal failure selectable
•
Maintenance free
SPECIFICATIONS
TemperatureLimits
Ambient operating limits
-10 to+50 °C
at 5 to 95% rh
Ambient storage limits
-40 to+70 °C
at 5 to 95% rh
Medium valve temperature Max. +150 °C (220 °Cwith
HighTemperatureKit)
Safety
Protection class
II as per EN60730-1
Protection standard
IP54 as per EN60529
Flame retardant housing V0 as per UL94, withmetal
cable gland
Noise level
≤
45 dB(A)
Signals
Input range
Y= 0(2)...10Vdc, 0(4)...20mA
Input impedance
for voltage
R
i
= 100 k
Ω
formA
R
i
= 500
Ω
Signal source output
impedance
Max. 1 k
Ω
Output voltage range
Position: 2...10Vdc
Output load
Max. 1mA
Wiring
Wiring terminals
1.5mm
2
Cable entry
PG13.5 (1/2'') andPG11;
knock-out can be enlarged to
PG16
Material
Cover
ABS-FR
Yoke andBase
Aluminum diecast
Weight
2.0 kg
Dimensions
seeFig. 2.
SPECIFICATIONDATA
