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*941367-00*
941367-00
MEL 24/25 Series
Motorized Electric Latch Retraction
These instructions are for MEL conversion kits or MEL
devices with preinstalled motors.
Parts
MEL motor
assembly
MEL 6' cable with motor cable
MEL
cover plate
4-20 x ¹⁄₄" FHP screws (qty 2)
Do not discard
Motor cable
only
(114320)
(47269206)
MEL motor mounting
Installation Instructions
If MEL is preinstalled in the device:
Follow original device instruction up to the point
A.
where this end mounting bracket step has been
completed.
Mark and Prepare 2 Holes
a
c
Complete MEL wiring per steps 15-21 of this
B.
instruction.
Return to original device instruction at point you left
C.
off, and complete installation.
b
Metal/Metal/Métal
#25
#10-24
Wood/Madera/Bois
¹⁄₈" (3 mm) x 1" (25 mm)
Allegion Connect accessories available to order
106198 MEL-CON adapter cable with 8-pin connector
040069 MEL motor cable + MEL-CON adapter cable with 8-pin
connector
If installing the MEL conversion kit, follow
the instruction steps as written.
1 Remove end cap
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2 Remove device end mounting bracket from door
3 Slide back, remove and discard old cover plate
5 With device laying on a table or bench, remove the 2
screws that connect mechanism case to center case
Use long shank
screwdriver.
6 Unhook baseplate from center case
a. Slide back mechanism case about 2” to access hooking
parts.
b. Push bar guides will come loose and will need to be
reinstalled later.
c. Unhook baseplate from center case.
4 Remove center case cover and device from door
b
a
center
case
pushbar
guide
mechanism
case
baseplate
b
a
c
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7 Slide baseplate out of mechanism case
baseplate
8 Remove any existing dogging assembly
d.
e.
f. Slide m
32
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sticker
Use #1 Phillips
screwdriver
9 Secure motor assembly
a. Turn baseplate assembly upside down so pushpad is
resting on a at surface and motor mounting location is on
the left.
motor mounting
location
pushpad
b. Place motor in left hand with LED status sticker facing
toward you. Gently extend silver hook arm outward (about
Z\x”) until you meet some resistance, then hold.
b
LED
status
d. Set motor on at surface.
e. Push down rmly on baseplate so it bottoms out against
push pad.
f. While depressing baseplate, lift up motor assembly and
guide it along elongated baseplate slot until motor lip slips
over baseplate.
e
c. While tilting baseplate assembly away from you slightly,
move extended hook arm into position under baseplate. A
post will be hanging down from baseplate; the hook arm
should sit on the near side of that post. Rotate the motor
assembly to hook the arm over the baseplate axle pin that
is closest to the baseplate. Do not pull out on motor at this
step.
pin
post
f
Lip slips over baseplate
g. Release baseplate. Secure motor assembly with 2 small
self-tapping screws (provided).
90°
h. Turn baseplate and motor assembly right side up.
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10 Slide mechanism case onto baseplate
Insert pushbar guide ahead of motor
assembly and hold in place (a) while sliding
mechanism case onto baseplate (b)
a
b
11 Reconnect center case to baseplate via hooking parts
13 Reattach mechanism case to center case
Use long shank
screwdriver.
14 Reattach device to door
12 Insert remaining pushbar guide (nearest the center
case) and slide mechanism case against center case
a
b
x4
x2
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MEL Wiring and Conguration (page 1 of 3)
15 Complete wiring
If not wiring at this time, DO NOT DISCARD CABLE!
After installing device or conversion kit, if there is room, store the cable inside the mechanism
case until the electrical wiring occurs. Otherwise, store the cable in a designated location.
a. Drill wire access hole.
b. Route furnished 6’ MEL two-piece cable thru device end mounting bracket to connect MEL device to power transfer wires.
c. Plug cable connector into MEL motor.
d. Reinstall end mounting bracket.
e. Refer to table below to route proper gauge wires (from electric hinge, EPT, or door loop) to PS900-Series power supply.
⁵⁄₁₆"
⁵⁄₈"
Dia.
a
connect to power
transfer wires
b
PS900-Series power
supply with 900-Series
option board(s)
installed
end mounting bracket
c
d
MEL device used
with EPT, Electric
Hinge, or Door Loop
Distance
(one way)
200’ 18AWG
320’ 16AWG
500’ 14AWG
800’ 12AWG
Wire
Gauge
e
Power wires to MEL are not polarized.
MEL Electrical Load
Voltage: 24 VDC
Current: 1.0 A inrush (0.5 sec)
0.14 A holding
electric hinge shown
(an EPT or door loop
may also be used)
MEL exit
device
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MEL Wiring and Conguration (page 2 of 3)
WARNING
To avoid risk of electric shock, turn off AC power to power supply before
installing or wiring option board.
16 Conrm equipment compatibility
MEL is compatible with the following equipment (refer to individual instructions as needed):
• PS900-Series power supplies - PS902, PS904, PS906, PS914
• 900-Series option boards - 900-2RS, 900-4R, 900-4RL
17 Install 900-2RS, 4R, or 4RL option board(s) into power supply
Review Available 900 series Option
a
Board Mounting Locations (Gray)
Plug Option Board Cable into
b
any Available Option Connector
PS902
PS904
PS914
PS906
1
1 2
1
PS902
1 Board
Option 1
PS904, 914
2 Boards
Option 2
Option 1
1
Option 2
Option 1
c
Secure Board(s) with Screws
PS906
3 Boards
Option 3
WARNING
Fire alarm (FA) option board required if MEL is installed in fire exit hardware.
2
3
Notes:
1. 24 VDC output setting required when MEL device connected.
2. If installing board in location 2 or 3, rotate board 180˚.
3. Latchbolt retraction of (2) sequenced MEL devices requires more than 1 second to
complete.
4. When powering multiple components, verify that the amperage requirements of all
components combined does not exceed the power supply output rating.
76
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MEL Wiring and Conguration (page 3 of 3)
18 Connect input and output wires to option board (2RS shown)
Sequential Mode - Typical Wiring
Individual Mode - Typical Wiring
PS900
Series
Note:
Fail secure
output only
allowed if
approved by
Authority Having
Jurisdiction
PS900
Series
SC I1 01 I2 02 GND
120/240 VAC
50/60Hz
SC I1 01 I2 02 GND
2RS
Access
Control
Devices
120/240 VAC
50/60Hz
2RS
for
1 & 2
Access
Control
for
Device 2
Input I1 will activate both outputs
EPT-2/10
MEL Device 1
Input I1 will activate output 1
Input I2 will activate output 2
EPT-2/10
MEL Device 2
EPT-2/10
MEL Device 2
19 Check operation
a. Activate each input and verify all MEL devices operate properly.
b. If any device does not operate properly, see next page for troubleshooting.
Access
Control
for
Device 1
EPT-2/10
MEL Device 1
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MEL Troubleshooting
20 If necessary, troubleshoot operation (LED is only visible with the mechanism case removed)
Power at
the MEL
24 VDC
24 VDC low
29 VDC or
greater
13 VDC or
lower
0 VDC
*For information about adjusting exit devices, you can nd their installation instructions in the
support area at www.allegion.com/us or call Technical Services at 1-877-671-7011
MEL Response Condition/Solution
LED - solid green
Latchbolt - retracted
LED - solid red after latchbolt
attempts to retract multiple
times
LED - ashing green/red
Latchbolt - not retracted
LED - ashing green
Latchbolt - retracted
LED- ashing red
Latchbolt - will not retract
LED - o
Latchbolt - not retracted
Operation normal, latch retracted immediately
Latchbolt cannot fully retract mechanically
Remove power. Depress pushbar and make sure
latchbolt retracts and extends fully. If necessary,
disconnect any vertical rods or mortise lock from
device center case, and reapply power. If motor
holds, mechanical adjustments may be required
per the device instructions.*
Excessive tamper (while power applied, the
pushpad was pulled out at least 3 times)
Wait 15 seconds and latchbolt will retract again OR
remove and reapply power to clear condition.
Voltage low during latchbolt retraction
(latchbolt retracts at reduced force)
Wire length is too long, wire gauge is too small, or
power supply has poor regulation.
Input voltage is too high for proper operation
Wrong power supply, power supply defective.
Input voltage is too low for proper operation
Wrong power supply, power supply defective or not
set to the proper output voltage.
To set, remove AC power from power supply,
change power supply setting from 12 to 24 VDC,
then reapply AC power and verify proper operation.
No input voltage
Problem with the power supply, control switch, or
wiring.
LED
on Device
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21 Install MEL cover plate
Do not cut from recessed end of cover plate
recessed
area
Install this
end first
recessed end
back of new
MEL cover plate
back of old
cover plate
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22 Reinstall end cap
23 Reinstall center case cover
1110
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Warnings look like this:
Cautions look like this:
Warnings and Cautions
WARNING
Warnings indicate potentially hazardous conditions, which if not
avoided or corrected, may cause death or serious injury.
CAUTION
Cautions indicate potentially hazardous conditions, which if
not avoided or corrected, may cause minor or moderate injury.
Cautions may also warn against unsafe practices.
Notices look like this:
Directions look like this:
Notices indicate a condition
that may cause equipment
or property damage only.
Directions identify a step that
may or may not apply to your
product configuration. It also
may direct you to another
part of the instruction.
Customer Service Servicio al cliente Service à la clientèle
1-877-671-7011 www.allegion.com/us
© Allegion 2019
Printed in U.S.A.
941367-00 Rev. 03/19-a
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