KMC MEP-7852

Actuator: Proportional, Failsafe, 24VAC/VDC, 320 in-lbs

Direct-Coupled ControlSet Actuators, Proportional 2-10 VDC with Feedback (320 in-lb)

These powerful, efficient, durable, direct-coupled actuators provide tri-state or proportional control for large control dampers or valves in HVAC systems. A minimum torque of 180 or 320 in-lb. is available over the 94° angular rotation. Capacitor-driven fail-safe models provide efficient operation with switchselectable fail direction.

The proportional actuator models accept a 2–10 VDC or 4–20 mA control signal input from a thermostat, controller, or building automation system. “Anti-jitter” circuitry significantly reduces hunting and needless wear (from unnecessary miniscule position changes caused by undamped analog input signals) on the actuator and valve packing or damper components. A user-initiated, auto-mapping feature provides more precise equipment control by reassigning the (2–10 VDC or 4–20 mA) input signal range over a reduced rotation range. These models also feature a switch-selectable, 1–5 or 2–10 VDC voltage feedback output that is proportional to the actuator position.

The tri-state models are designed for use with floating thermostats, controllers, or building automation systems. They feature an optional 10K ohm (±10%), three-wire potentiometer feedback output. Fail-safe models also allow two-position control as well.

All actuators mount directly on ⅜” up to 1.05” round or 5/16” up to ⅝” square shafts, eliminating the need for expensive and complicated linkages. A non-rotation bracket, to prevent lateral movement, is included with each actuator. A gear disengagement button allows manual positioning of the shaft without energizing the actuator. Removable terminals and ½” NPS conduit fittings make wiring easier. The actuators are protected against overloading and do not require end or limit switches.

Features:

• More powerful and less load-dependent (reduced spread between no-load and full-load timing) than earlier MEP-1200/7000/7700 series actuators they replace
• Proportional models include “anti-jitter” circuitry and optional auto-mapping of the full input signal range over a reduced actuator stroke
• Efficient, durable, capacitor-driven fail-safe option with switch-selectable direction provides consistent torque in both powered and fail-safe modes
• Potentiometer or voltage feedback option
• Removable terminals and ½” conduit fittings
• Direct mounting to standard shaft sizes, and a gear disengagement button for manual shaft positioning

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