KMC MEP-4552 Spring-Return 45in-lb Actuator with Fail-Safe
These compact but powerful direct-coupled ControlSet® actuators provide two-position, tri-state, or proportional control for dampers or valves in HVAC systems. Efficient, durable, capacitor-driven fail-safe with switch-selectable direction provides consistent torque in both powered and fail-safe modes. A patented noise reducer provides whisper-quiet operation in both modes.
MEP-4xx2 proportional models accept either a 0–10 or 2–10 VDC control signal input from a thermostat, controller, or building automation system. “Antijitter” circuitry significantly reduces hunting and needless wear (from unnecessary miniscule position changes caused by undamped analog input signals) on the actuator, valve, or damper components. A user-initiated, auto-mapping feature provides more precise equipment control by reassigning the input signal range over a reduced rotation range. These models also feature a switch-selectable, 0–5 or 0–10 (or 1–5 or 2–10) VDC voltage feedback output that is proportional to the actuator position.
Efficient, durable, capacitor-driven fail-safe option with switch-selectable direction provides consistent torque in both powered and fail-safe modes
The fail-safe option, on proportional and tri-state models, can be turned off temporarily for testing purposes or permanently if desired
Proportional models include “anti-jitter” circuitry, optional auto-mapping of the full input signal range over a reduced actuator stroke, and switchselectable 0/1–5 or 0/2–10 VDC feedback
Connections are made with prewired 3-foot, 18 AWG cable(s) or fixed terminals that accept 12–26 AWG wiring (see Models on page 2)
Direct mounting to standard shaft sizes, gear disengagement button, and adjustable mechanical end stop