PLS PLS-ML1200 How to use

1
Installer's
Reference Guide
PLS-ML1200
Electromagnetic Lock
Power-up turns on the electromagnet, which is attracted to
the steel armature plate, which is mounted on a door,
holding the door fast against unauthorized entry. When
power is turned off, the electromagnet releases the armature
plate, allowing the door to open.
TECHNICAL SPECIFICATIONS
PLS-ML1200
Power
Magnet Size
Armature Size
Holding Force
Current Drain
Voltage Tolerance
Housing Material
Operating Temperature Limits
Weight
12VDC / 24VDC
10.5 x 1.625 x 2.625 in. (268 x 42 x 67 mm)
7.25 x 0.625 x 2.375 in. (185 x 16 x 61 mm)
1200 lb. (545kg)
500mA @ 12VDC; 250mA @ 24VDC
± 10%
Aluminum
14° ~ 131°F (-10° ~ 55°C)
11 lb. (5.0kg)
Function Overview
Jamb
Door
Armature
Maglock
L-bracket

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Filler Plate.
More than 1
plate may be
required.
Standard
Mounting
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"Z" Bracket
For Inswing Doors
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"L" Bracket
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Fig.
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Sexnut tube
Sexnut
bolt
This side drill
16mm only
Drill an 8mm hole
thru door
Armature
Screw
Steel and
Rubber washers
(as needed)
Armature
HOLLOW METAL DOOR
Drill an 8mm hole thru door. From sexnut bolt side only,
enlarge the 8mm hole to 16mm. Drill an 8mm hole thru door. From sexnut bolt side of door, drill 12.7mm (1/2") hole, 25mm (1") in depth. Drill a 6.8mm dia. hole and tap for M8 x 1.25 thread.
Sexnut
bolt
Drill 12.7mm (1/2") Drill an 8mm hole
thru door
Armature
Screw
Armature
SOLID CORE DOOR
Armature Screw
Tap M8 x 1.25 Thread
REINFORCED DOOR
Armature
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Steel and Rubber
washers (as needed) Steel and Rubber
washers (as needed)
MOUNTING THE PLS-ML1200
I. Drill holes for the mounting and armature
plates (see fig. 1 and 2):
A. Fold mounting template on the dotted line.
B. Close the door. Locate the mounting
location on the door frame near the upper
free-moving corner of the door, as close to
the corner of the door frame as possible.
C. Hold or tape the template against the door
and frame.
D. Drill two holes in the door frame and
three holes in the door, as indicated on
the template.
NOTE: Filler plate, L-bracket or Z-bracket
(optional) may be required for the
electromagnet, depending on door
frame. See fig. 1.
II. Mount armature plate to the door using at
least two steel and one rubber washer (fig. 2):
NOTE: Actual installation varies according to
door type.
A. Put one rubber washer between two steel
washers, and place them over the armature
screw between the armature plate and the
door. This will allow the armature plate
to pivot slightly around the armature
screw to compensate for door
misalignment.
B. Tighten the sexnut bolt enough so the
armature plate can withstand the force of
someone attempting to break down the
door while the electromagnet is engaged.

3
Important:
Verify correct jumper settings before connecting
the lock to the input power. If 24VDC is used
with 12VDC setting, then lock may be damaged.
If 12VDC is used with 24VDC setting, then lock
will have much less holding force.
Fig. 3
Power Cable To
Magnet
INPUT
POWER
Control
Device
Power
Supply
+
-
+
-
Select Voltage
12VDC
Magnet is set to 12VDC
default operation as
supplied from factory.
Jump the two middle pins
for 24VDC operation.
24VDC
C. Do not tighten the armature plate against
the door. The plate must be able to pivot
around the armature screw.
D. Make sure the anti-spin guides are in the
two guidepin holes.
III. Screw the mounting plate to the door frame or
optional bracket:
A. Screw the two short self-tapping screws
in the slotted holes of the mounting plate
and adjust the position of the mounting
plate so that it and the armature plate
form a 90-degree angle.
B. Once the position is correct, use the long
self-tapping screws to permanently mount
the bracket.
C. Remove the two short screws.
IV. Drill the cable access hole.
V. Mount the electromagnet to the door frame
(fig. 1) — Use the Allen wrench to screw the
socket-head mounting screws through the
bottom of the electromagnet into the mounting
bracket.
VI. Connect the power leads (fig. 3):
A. Open the electromagnet.
B. Run two power leads from the power
supply through the cable access hole into
the electromagnet.
C. Connect the power leads to the terminal
block.
D. Close the electromagnet.
VII. Test the unit.
VIII. Insert the tamper caps into the mounting
screw access holes. This should be the last
step, as once the tamper caps are in place,
they will be difficult to remove.

4
NOTICE
The information and specifications printed in this manual are current at the time of publication. However, the PLS policy is one
of continual development and improvement. For this reason, PLS reserves the right to change specifications without notice.
PLS is also not responsible for misprints or typographical errors.
Copyright © 2003 PLS. All rights reserved. This material may not be reproduced or copied, in whole or in part, without the
written permission of PLS.
REGULAR MAINTENANCE
• Clean the contact surfaces of the electromagnet or armature plate with a soft cloth and non-abrasive, non-
corrosive cleaner.
• Apply a light coat of a silicon lubricant to prevent rust. Wipe away the excess.
• Check that the armature plate is securely attached to the door, yet can pivot slightly around the armature
screw.
• Check that the electromagnet is securely attached to the door frame.
TROUBLESHOOTING
Problem:
The door won't lock
The door locks, but can be
easily forced open
Door releases only after a
delay
Possible causes:
No power
Electromagnet and armature
plate are not making good,
close contact
Incorrect voltage setting
A secondary diode was
installed across the
electromagnet
Solutions:
• Check to make sure the wires are securely
tightened to the terminal block
• Check that the power supply is connected and
operating
• Make sure the lock switch is wired correctly
• Make sure the electromagnet and armature plate
are properly aligned
• Make sure the contact surfaces of the
electromagnet and armature plate are clean and
free from rust
• Check the power leads with a meter, and make sure
12VDC or 24VDC is present and that jumper
settings match actual power supply voltage. See
Fig. 3.
• The electromagnet comes with a metal oxide
varistor built in to prevent interference, so do not
install a secondary diode
WARRANTY:
PLS Electromagnetic Locks are warranted against defects in material and
workmanship while used in normal service for a period of one (1) year from the date of sale to the original
customer. Our obligation is limited to the repair or replacement of any defective part if the unit is returned,
transportation pre-paid, to PLS.