Seco-Larm SD-993B-SS User Manual

Installation Manual

SECO-LARM

SD-993B-SS

Electric Shear Lock

• Concealed security for remote access and
exit control of aluminum and steel doors
or gates.

• Smaller size for use with most metal
door jambs.

• Zinc-plated magnet and armature,
aluminum anodized housing.

• Works with sliding, single-action, and
double-action (swing-through) doors
and gates.

• Use with an optional digital keypad for
keyless high security.

• Spring-loaded locking bolts and magnetic
bond holds doors securely in place with
approximately 1,500 pounds (680kg) of
shear holding force.

• Fail-safe operation (unlocks if power
is lost).

Bracket kits for SD-993B-SS

Contact your SECO-LARM sales
rep for infomation about
optional bracket kits.

• SD-993S-SB
Surface­mounting kit.

• SD-993S-UB
U-bracket kit
for glass.

See the last page of the
manual for a copy of the
bracket installation manual.

—

—

• Armature plate adjusts to compensate for
gaps between door and frame.

Specifications:

Holding force 1,500 lbs. (680 kg.)

1

Magnet housing dimensions (faceplate) 7
Armature assembly dimensions (faceplate)
Power 420mA @ 12VDC, 210mA @ 24VDC.
Door gap Max. 1/16” (2mm).

IMPORTANT — IT IS THE RESPONSIBILITY OF THE END USER AND THE
DEALER/INSTALLER TO ENSURE THIS UNIT IS MOUNTED IN ACCORDANCE
WITH ALL LOCAL FIRE AND OTHER SAFETY REGULATIONS. THIS UNIT IS
NOT FIRE-RATED.

IMPORTANT — SOME METHOD, SUCH AS A RELAY, MUST BE USED TO
ENSURE DOORS PROTECTED BY THIS UNIT CAN BE OPENED IN CASE OF
AN EMERGENCY.

/8” x 13/16” x 11/16” (180 x 30 x 27 mm).

71/8” x 13/16” x 15/8” (180 x 30 x 42 mm).

ELECTRIC SHEAR LOCK Installation Manual

MOUNTING LOCATION (see Fig. 1)

1. Top of door — Mount here for best results, as this allows flexibility against direct
attacks against the door. Mount close to the corner opposite the hinges.

2. Middle of door, opposite the hinges — This works well in most situations. If
mounting is required here, mount halfway up the door for greatest strength. Add
extra springs to the armature assembly (see Fig. 4).

3. Bottom of door — Not recommended, as dirt buildup could affect operation.

INSTALLATION NOTE

Install the magnet assembly into the door frame before installing the armature assembly
into the door. The magnet assembly requires space to run wires, as well as space for the
recessed portion of the unit. However, make sure that the position selected for the
magnet assembly leaves enough room in the door to install the armature assembly.

INSTALLATION — CUT THE DOOR FRAME (see Fig. 2)

1. Find the center line:
a. Close the door and let it rest naturally.

b. Use a pencil to trace the position of the outside face of the door on the door

frame. If mounting on the top of the door, this line should be near the top corner
away from the door hinges. Leave enough room to mount the magnet assembly
in the door. If mounting on the side of the door, this line should be drawn near
the center of the door, but not near any physical locking mechanisms.

c. Measure the width of the door, then draw a line on the door frame parallel to

the first line at that distance. These two lines will show where the door rests
relative to the door frame when it is closed.

d. Measure and trace a line between these two lines. This is the door frame center

line.

e.

IMPORTANT — Make sure the place you choose to mount the magnet assembly is

clear of obstructions and door adjustment bolts before making any cuts. Allow
enough room inside the door frame at both ends of the magnet assembly to
install the mounting tabs.

2. Tape the door frame template to the door frame, lining the template’s door frame
center line with the door center line you just drew.

3. (For hollow metal door frames)

a. Cut out the rectangular piece of metal as shown on the door frame template.
b. Drill the four holes (two on each end) as shown on the door frame template.
c. Using the included metal screws, mount the mounting tabs.
d. Run the wires.

4. (For wood door frames)

a. Rout or cut a 1

of the magnet assembly as shown in the door frame template.

b. Rout a

c. Run the wires.

3

/16” (5mm) deep, 5/8” x 13/16” (17 x 30 mm) hole at each end of the cavity.

1

/16”(27mm) deep, 513/16” x 13/16” (147 x 30 mm) hole for the cavity

SECO-LARM U.S.A., Inc.Page 2

Magnet

ELECTRIC SHEAR LOCK Installation Manual

7-1/8” (180mm)

6-7/16” (164mm)

Assembly

Armature
Assembly

Fig. 1 -Preferred mounting locations

Top of door - BEST

Middle of door ­GOOD

Note: Add extra
springs for vertical
mount (see Fig. 4)

7-1/8” (180mm)

6-7/16” (164mm)

Fig. 2 -Preparing the mounting positions

Width
of door

Door
center
line

Outside of
door when
closed

5/8”

5/8”

(16mm)

(16mm)

1-3/16”

(30mm)

1-3/16”

(30mm)

Bottom mounting not
suggested

Parts List:

1 x Magnet assembly
1 x Armature assembly
4 x Spacers
2 x Springs (for use

when the SD-993B-SS

is mounted vertically)
16 x Metal screws
1 x Hex wrench

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