Description

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, ventilation, and air conditioning (HVAC) applications. Description 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 SPECIFICATION Temperature Ambient operating -10~+50℃ at 5~95% r.h. Ambient storage -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