The ML7421A / ML7421B actuators are designed for modulating control, accepting 0(2)...10v or 4...20mA input signal, and providing feedback signal 2...10 Vdc only. They operate Honeywell’s standard valves in heating, venti lation, and air conditioning (HVAC) applications.

FEATURE • Easy and quick installation • No separate linkage and adjustments required • Low power consumption and maintenance-free • Self-adaption function • Force-limiting end stops • Manual operation knob • 0(2)~10 Vdc input and 2~10 Vdc position feedback • Direct/ Reverse action adjustable • Selectable stroke position when signal failure • Corrosion-resistant design

SPECIFICATIONS
 

Temperature Limits
Ambient operating limits	-10~+50 ℃ at 5~95% r.h.
Ambient storage limits	-40...+70 °C at 5...95% r.h.
Medium temperature	150 °C max. (220 °C with High-Temperature kit)
Signals
Signal input	y=0(2)~10 Vdc or 4~20 mA
Input impedance	for voltage Ri=100 KΩ for mA Ri=500Ω
Position feedback signal	x=2~10Vdc
Output impedance	1 KΩ max.
Output load	1 mA max.
Safety
Protection	class III as per EN60730-1
Protection standard	IP54 as per EN60529
Flame retardant	housing V0 as per UL94 (with metal cable gland)
Material
Cover	ABS-FR
Yoke and Base	Aluminum die-cast