Brochure

MEP-75xx/78xx fail-safe or non-fail-safe actuators are
designed to regulate large air dampers and valves.
• Models offer 180 or 320 in-lb. of torque.
• Proportional models accept a 2–10 VDC or 4–20
mA control signal input. These models also have
“anti-jitter” circuitry, auto-mapping, and switch-
selectable, feedback voltage output.
• Some tri-state models have a 10K ohm
potentiometer feedback output. Tri-state models
with fail-safe can optionally be wired for two-
position operation.
• Adjustable single or dual SPDT auxiliary switches
can also be field-installed on any model.
• All models have built-in overload protection,
eliminating the need for end or limit switches.
MEP-40xx/48xx non-fail-safe actuators are designed
to regulate smaller control air dampers, VAV terminal
units, and valves.
• Despite their compact size, these direct-coupled
actuators provide a minimum torque of 40 or 80 in-
lb. (available over its 95° angular rotation), making
them ideal for places where space is at a premium.
• Proportional models accept a 2–10 VDC control
signal input from a thermostat or controller.
“Anti-jitter” circuitry significantly reduces hunting
and needless wear on the actuator and valve or
damper components (from unnecessary miniscule
position changes caused by undamped analog
input signals). A user-initiated, auto-mapping
feature provides more precise equipment control
by reassigning the input signal range over the
desired reduced rotation range. A 1–5 or 2–10 VDC
(switch-selectable) feedback voltage output is
proportional to the actuator position.
• Tri-state/two-position models are designed for use
with floating thermostats or controllers.
• A fully adjustable built-in auxiliary switch, for remote
position indication or controller and equipment
interface, is available on selected models.
More Information
• For more information
about these actuators
(including those
mounted on VEB-
43/46/53/56 and
VEF-53/56 valves),
see their respective
data sheets. All these
documents and more
information can be
downloaded from the
award-winning KMC
Controls web site
(kmccontrols.com).
• See also the video
“When Failure Is
not an Option: The
Evolution of Fail-
Safe Actuators” at
youtube.com/user/
kmccontrols.
MEP-4001
MEP-42xx/45xx/49xx fail-safe actuators add these
options.
• Torques of 25, 45, or 90 in-lb. are available.
• MEP-4xx1 tri-state/two-position (three-wire) models
are designed for use with floating thermostats or
controllers.
• MEP-4xx4/4xx5 two-position (two-wire) models are
available in 24 VAC/VDC or 100–240 VAC models.
• Up to two auxiliary switches are available.
• MEP-4201/4501/4901 tri-state/two-position actuators
offer similar features but without fail-safe.
MEP-7852
MEP-4252