KMC Controls MEP-7800 User Manual
Mounting
INSERT
5"
8"
3"
3/8"
Conduit
fitting
plate
and red
plugs
Direct-Coupled ControlSet® Actuators (120/180/320 in-lb.)
Installation Guide
10 1/8"
HMO-4535 non-rotation
bracket (provided)
8"
Gear disengagement button
2-7/16"
MEP-7200/7500/7800 Series
1. Ensure that the damper can move freely through
its entire range of motion, and x any binding
before installing the actuator. Turn the damper
blade to its fully closed position.
2. Press and hold the gear disengagement buon
(see Illustration 1), rotate the actuator to the fully
closed position, and release the buon.
NOTE: Depending on the damper-seal design,
backing the actuator o its stop
approximately 5° may provide tight
damper shut-o.
3. Depending on the size of the shaft, use the
optional shaft insert as is, reverse it, or remove it.
Slide the actuator onto the shaft.
5"
4. Leaving a gap between the actuator and
mounting surface to prevent any binding, ngertighten the nuts on the V-bolt.
5. Insert the non-rotation bracket (supplied HMO-
4535) into the slot at the base of the actuator.
6. Secure the non-rotation bracket with two (2) #8
self-tapping screws.
NOTE: The two holes at the top of the actuator are
INSERT
Shaft insert
INSERT
Shaft insert
not for use in direct-coupled applications.
They are for remote mounting, such as with
the optional HLO-1020 Crank Arm Kit. (For
accessory information, see the MEP-7xxx
Position insert as
shown for 3/8"
to 9/16" round
shafts or 5/16"
to 3/8" square
shaft (1/2" round
shafts on center)
Illustration 1—Overview (Direct-Coupled Mounting)
Position insert as
shown for 5/8"
to 13/16" round
shafts or 1/2"
to 5/8" square
shafts (3/4"
round shafts on
center)
Remove insert
for 7/8" to
1.05" round
shafts (1.05"
round shafts
on center)
7. Evenly tighten the V-bolt nuts to 110 to 120 in-
8. Verify the operation of the actuator through its
NOTE: Before 2014, MEP-7xx2 proportional
Applications Guide.)
lb. while keeping the shaft insert centered and
square.
full rotational cycle.
models had 0–10 VDC inputs and 0–5 or
NOTE: The MEP-7200 series (120 in-lb.) was
discontinued. Use an MEP-75xx (180
in-lb.)—or, if less torque is required, an
0–10 VDC feedback. Starting in Jan. 2014,
they have 2–10 VDC inputs and 1–5 or
2–10 VDC feedback instead.
MEP-48xx (80 in-lb., non-fail-safe) or MEP49xx (90 in-lb., fail-safe) instead.
MEP-7200/7500/7800 Series 1 Installation Guide
Wiring (General)
24 VAC/VDC
Power In
Feedback
Potentiometer
(MEP-7xx3 only)
24 VAC/VDC
Power In
24 VAC/VDC
Power In
2–10 VDC Control Signal
4–20 mA Control Signal
1–5 or 2–10 VDC Feedback Signal
Control Signal Common
(MEP-7x52 Only)
Feedback
Potentiometer
(MEP-7xx3 only)
CW
CCW
CW
CCW
1. Loosen the screws on the tethered access cover
and remove the cover.
2. Slide the conduit ing plate out.
3. Using a utility knife or drill, cut the red plug
to accept wiring or replace the plug with an
application-specic ing.
NOTE: The red plugs (or similar ings) protect
the internal components from debris,
helping to ensure long actuator life.
4. Thread wires through the plugged opening and
connect to the terminal block according to the
appropriate model and options desired. (See
Illustrations 2 through 5.)
NOTE: For your convenience, the wiring terminal
block is removable.
NOTE: For two-position wiring on a fail-safe tri-
state actuator (see Illustration 5), choose
one of these (jumpered) rotation options:
1. For clockwise rotation when the 24 volt
circuit switch/contact is closed, jumper
the 24 VAC terminal to the CW terminal
and select CCW on the Fail switch. When
the circuit opens, the actuator rotates
fully counterclockwise.
2. For counterclockwise rotation when
the 24 volt circuit switch/contact is
closed, jumper the 24 VAC terminal to
the CCW terminal and select CW on the
Fail switch. When the switch opens, the
actuator rotates fully clockwise.
24 VAC/VDC
Power In
Control Signal Common
2–10 VDC Control Signal
4–20 mA Control Signal
1–5 or 2–10 VDC Feedback Signal
(MEP-7x52 Only)
Illustration 2—MEP-7xx2 Wiring (Proportional)
24 VAC/VDC
Power In
CW
CCW
Feedback
Potentiometer
(MEP-7xx3 only)
Illustration 3—MEP-7x01/7x03 Wiring (Tri-State, Non-Fail-Safe)
Feedback
Potentiometer
(MEP-7xx3 only)
24 VAC/VDC
Power In
CW
CCW
5. Reinstall the terminal block on the pins (if
removed) and the conduit ing plate.
6. For MEP-7xx2 (proportional) models, adjust the
Illustration 4—MEP-7x51/7x53 (Normal) Wiring
(Tri-State, Fail-Safe)
auto-mapping range reset, rotation direction,
and feedback voltage as needed. See Direction,
Feedback, & Auto-Mapping (Proportional MEP7xx2 Models) on page 3.
7. For MEP-7x5x models, adjust the fail-safe
(clockwise, counter-clockwise, or o) selector
24 VAC/VDC
Power In
Switch/Contact
Jumper
1
Feedback
Potentiometer
(MEP-7xx3 only)
2
2
1
switch, beside the terminal block, as needed.
NOTE: After initial connection or reconnection
to power (until the capacitors are fully
charged), fail-safe operation might be
delayed up to 20 seconds for the MEP725x/755x or up to 40 seconds for the MEP785x.
8. Reinstall the tethered cover and tighten the
screws.
MEP-7200/7500/7800 Series 2 Installation Guide
Illustration 5—MEP-7x51/7x53 Two-Position Wiring
(Tri-State, Fail-Safe)
Wiring (Master/Slave)
See the MEP-7xxx Applications Guide.
Loading...