Assa Abloy Securitron TSB Manual

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Securitron®TSB
Touch Sense Bar
Installation & Operating Instructions
Mounting Hole Marking
1 PLAN AND MARK the mounting hole positions. Be
sure that you have the correct length bar for the door.
2 REMOVE the screws that secure the end caps on both
ends of the bar. If it appears that the bar is longer than
it should be for the door, see Cutting Instructions.
3 MAKE NOTE which end has the sensor (circuit board)
in it. This is the end that should be mounted on
the hinge side for easiest wire exit from the door.
A template located at the end of this instruction
manual has been provided, although it is generally
preferable to hold the bar in position and use it as a
“self-template.” The templates are particularly valuable
if door preparation is to be done in advance. In setting
your mounting holes, there are three concerns:
• They must be level or the bar will be tilted.
• They must be the correct distance apart.
• They must be correctly placed “left/right” on the door.
Leveling is best done by use of a carpenter’s level.
If one is not available, measure from the mounting
hole positions on each edge of the door to the
door bottom. This is not as effective as it assumes
that the door is level which is not always true.
NOTE: In general, US building codes require the height of
the bar above the door bottom to be between 30" and 44".
If the bar is used as its own template, you
will automatically get correct separation
between the mounting holes.
NOTE: If you use the templates, there is a line drawn
on each template which must line up with the outer
edge of the plastic end pieces on the bar. After you’ve
mounted the templates, hold up the bar to make sure
the end piece lines up to get the correct distance.
Left/right placement on the door is an important
point. In most installations, the bar should be centered
on the door. This produces the most attractive result.
However, if the door has a vertical door stop on the
edge that swings open, you may need to shift the bar
somewhat towards the hinge side to avoid scraping
the stop when the door opens. You should always
experimentally position the bar on the door and
open the door to see that there is no interference.
Finally, if the installation is on an aluminum frame glass
door, make sure you don’t position the bar so that the
mounting screws go into the glass. On standard doors,
keeping the mounting holes at least 3/4" (19 mm)
from the inner edge of the aluminum will be safe.
Description
Securitron TSB is an exit device for doors secured by magnetic
locks. The assembly consists of an aluminum bar available in
lengths to fit on standard U.S. door openings: (36", 42", and 48"),
Polycarbonate end pieces to mount the bar on the door, and
an electronic touch sensor mounted within the bar. Fasteners
for metal doors are included. For through door mounting,
please call factory for a no-charge Securitron TSB-TDM kit.
NOTE: that US type or metric fasteners are supplied depending of the version of the bar
which has been ordered. The metric version part numbers include the suffix: “M”.
When the bar is touched, a relay in the sensor is tripped, releasing the lock. The
bar’s sensitivity is adjustable. In the unlikely event of sensor failure, a push switch
is mounted on the back side of the bar. Depressing the switch has the same
effect as activating the sensor by touch and therefore represents built in safety
redundancy. The Securitron TSB cannot be used outside in rain conditions.
As the Securitron TSB is normally used to allow egress on an
electrically secured door, make sure that you are complying with
applicable building codes for your area. Check with your local
building department and/or fire prevention department.
Recommended Tools
• Medium, Small Phillips Drivers
• Drill Motor
• 1/4", 3/8", 1/8" Drill Bits
• Wire Cutter/Stripper
• Volt/Ohm Meter
• Crimp Connectors And Pliers

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Mounting Hole Drilling
There are three different procedures
depending on the door type.
Hollow Metal Doors employ supplied machine screws
and “blind nut” fasteners. This method leaves the outside
of the door unaffected. Longer machine screws and sex
bolts may be used on hollow or solid wood doors, solid
metal doors, or chalk filled fire doors, the Securitron
TSB-TDM kit for this type of mounting can be ordered
from the factory at no-charge. With this method, the
sex bolt heads do show from the outside of the door.
NOTE: The Securitron Touch Sense Bar may not be used on a fire
rated door that requires a fire rated latch (the Securitron TSB
has no latch), but sometimes fire doors are used on openings
where a fire rated barrier is not required, because the customer
has selected this door type for other reasons (such as solidity).
Another method is to use wood screws (not supplied) on
a solid wood door. By “solid wood”, we mean hardwood
interior rather than pressed wood as the wood needs
enough structural integrity to hold wood screws. This
method is strong and simple and has the advantage of not
showing sex bolts heads from the outside of the door.
HOLLOW METAL DOORS
• DRILL four 3/8" [9.5 mm] diameter holes only
deep enough to get through the inner side of
the door — not completely through the door.
FOR THROUGH BOLT MOUNTING
ON VARIOUS DOOR TYPES
• DRILL four 1/4" [6 mm] holes completely through the
door. For this type of installation (which may also be
elected for a solid wood door) you will be using screws
and finishing sex bolts suitable for a 1-3/4" [44 mm]
thick door supplied in the Securitron TSB-TDM kit.
Nearly all North American commercial doors are this
thickness. If the doors you are working on are different,
you will have to purchase different length screws or
apply some spacing techniques (described later).
FOR A SOLID WOOD DOOR
• You may elect to mount the bar with wood
screws (not furnished). We recommend 2-3/4"
[70 mm)] #14 wood screws with a hex, pan,
oval or round head. DRILL four 3/16" [5 mm]
diameter holes to a depth of 1-1/4" [30 mm].
Drill 23/6 or 3/8"
hole, as shown,
about 3/16" in from
each edge
Diagram 1 Bottom view
of hinge side end piece.
Diagram 2 Rear view of
end piece showing cable
routing through end piece.
“E” Clamp
Elongated Slot
6 Conductor
Jacketed Cable
Cable Connector
which attaches
to circuit board
Stainless door cord
inserts into hole
drilled in bottom of
end piece. Secures
with “E” clamp
“E” clamp
installed to
secure
stainless cord
Wireway Hole Drilling
The Securitron TSB connects to its power source
and to the devices it controls via a six-conductor
cable with push-on connector (supplied). There are
several different methods of getting this cable from
the Securitron TSB to external connection points.
The first issue is whether the cable needs to enter the
door (in which case a wireway hole must be drilled in
the door), or not. For most installations, it is preferred
that the cable enter the door. Exit from the door may
be via the supplied door cord which may be mounted
at the top of the door where it is out of the way, or via
any of many commercially available transfer hinges or
pivots (such as Securitron EPT Electric Power Transfer
or Securitron ELH Electric Hinge) which serve to route
the wiring off the door in a concealed manner. A
wireway hole is then drilled into the door in the position
shown on the template. It should be 3/8" [9.5 mm] in
diameter. The cable is then pulled into the door.
An alternate technique exists which does not route
the cable into the door but which takes it directly
from the end piece to the frame via the door cord.
This technique is preferred when the door type is
difficult to pull a wire through (such as any solid door). It
is also a good technique when the frame is not hollow as
the door cord can route the cable directly from the end
piece to a surface box mounted opposite the end piece.
For the best security and appearance, you will
not use the plastic door cord terminator when you
route the cord into the end piece. You will drill a hole
in the plastic end piece. The hole should be drilled
through the bottom flat of the end piece on the hinge
side. The ideal hole size is 23/64" (9.1 mm) but as
this drill size is unusual, 3/8" (9.5 mm) also works.
NOTE: Diagram 1 shows the end piece you would select if
the hinge side of the door was on the left. If it’s on the right,
use the other end piece but still locate the hole at the inner,
rear corner. With this method, the door cord is used to
route the cable directly from the end piece to the frame.
Wire Routing
If you elect the method of wire routing which uses
a hole in the end piece (see Diagram 2), you must
route your cable through the end piece prior to
mounting the end piece to the door. This is because
the flat cable connector will not pass through
the hole you have drilled in the end piece.
1 THREAD the cable end without the connector
down through the elongated slot in the end piece
(the slot is directly under the circuit board).
2 ROUTE it through the drilled hole in the elongated
slot in the end piece so that it exits the end piece.
3 PASS the stainless door cord over the cable
and slide it until you can push it into the
hole you have drilled in the end piece.
4 SECURE the stainless cord inside the end piece
with the supplied ”E” clamp. See Diagram 2.
It shows this assembly for the end piece
you would use for a door with hinges to the
left. If the hinges are on the right, use the
opposite end piece. The drawing will be
“reversed” but the concept is unchanged.
NOTES: if you are mounting to a surface box,
a second “E” clamp has been supplied so that
you can simply drill a hole in the box and secure
the stainless cord from the inside with the
second “E” clamp. If the frame is hollow, you would
employ the plastic door cord terminator when you
mount the other end of the door cord to the frame.
You are now ready to mount the bar to the door.

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Bar Mounting
The holes you have drilled for bar mounting were different depending on the type
of door. Similarly the final mounting procedure depends on the door type.
HOLLOW METAL DOOR
1 Identify the four supplied blind nuts.
2 Insert the nuts with the knurl engaging the edge of each hole.
3 Utilize the supplied collapsing tool to collapse the nuts.
Use of the tool is shown in Diagram 3.
4 Use the shorter (2-1/4" or 54 mm) supplied machine screws.
5 Place a tooth washer under the head of each screw
and mount the bar. Do not over torque.
THROUGH BOLT + SEX BOLT MOUNTING
1 Using longer 3-1/2" (90 mm) machine screws with the sex
bolts supplied in the Securitron TSB-TDM kit. You should have
already drilled 1/4" (6 mm) holes through the door.
2 From the outside of the door, enlarge the holes to 3/8" (9.5 mm)
diameter, 1" (25 mm) deep. Push in the sex bolts.
3 Place a tooth washer under the head of each screw and mount the bar.
NOTE: that the screw length is suitable for a 1-3/4" (44 mm) thick door.
Nearly all North American commercial doors are this thickness. If you have a door
of different thickness, a number of techniques can be applied. Screws of different
lengths can be purchased or the supplied screws may be cut (if the door is thinner).
Since the sex bolts are short, however, some final adjustments may be necessary. Spacing
washers may be added under the screw heads but if you raise the heads too high they
will interfere with removal of the circuit board (if this ever becomes necessary).
The board can still be removed but the mounting screws will have to come out
first and this is inconvenient. Another technique that is possible on solid doors
is to recess the sex bolts into the door by using a 1/2" (12.5 mm) counter bore.
SOLID WOOD DOOR
If you have elected to use wood screws (not furnished), place a tooth
washer under the head of each screw and mount the bar.
Diagram 3 Collapsing the blind nuts (Metal Door).
DOOR
TOOL
CAP SCREW
BLIND NUT
FLAT WASHER
KNURL
Collapses when cap screw turned
with allen wrench while tool held
fast with box wrench
Drill 3/8" [9.5mm] hole
press in blind nut as shown
While turning with allen
wrench, press in to keep
nut seated in door
Hold with wrench
or vise grip while
turning cap screw
Metal Door
Blind Nut
Through Bolt +
Sex Bolt Mounting
2-1/4" [57mm]
Machine Screw
3-1/2" [90mm]
Machine Screw
Sex Bolt
Solid Wood Door
with Wood Screws
2-3/4" [70mm]
Wood Screw
Diagram 4 End view showing three fastening
methods depending on door type.
Cutting the Bar
If the bar needs to be shortened to install properly,
it can be easily cut in the field. It must be cut from
the end which does not mount the sensor.
1 REMOVE the end piece completely by unscrewing
the two self tapping screws that hold it to the bar.
It is better to remove both end pieces so as to avoid
damaging the sensor circuit board by metal filings.
NOTE: that when you remove the second end piece which
carries the sensor, the sensor will slide out easily with
the end piece. There is, however, a ring terminal which
circles one of the end piece-to-bar mounting screws.
This ring terminal is connected by a wire to the circuit
board. This connection is how the sensor “sees” the bar.
2 When you REINSTALL the end piece, be
sure to reinstall the ring terminal.
NOTES: Cutting is ideally performed by a band or cut-off saw
to produce a neat result. However, with care, a hacksaw can be
used. The cut need not be perfect because the bar “pockets” into
the end cap. This hides a poor cut from viewing from the front.
The rear of the bar is not pocketed, however, and if
the bar is being mounted on an aluminum frame glass
door, a sloppy cut will be apparent from the outside
and will worsen the appearance of the installation.

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Electrical Specifications
Power Supply:
Voltage – 12/24 VDC
Current – 50 milliamps at rest (not being touched) and
12 milliamps while operating (being touched)
Relay Contacts: Maximum 2 amps at 30 VDC
Sensor Wiring
The cable connector is plugged into the male
connector on the circuit board so that the cable
routes directly back into the end piece. When
the bar is touched, the relay changes state.
For additional safety, the operation of the Securitron
TSB is fail safe, itself. When the Securitron TSB
receives power, its control relay automatically
energizes. It de-energizes when the unit is touched.
For releasing a magnetic lock, (Diagram 5 and 6)
shows typical connections of sensor, power supply
and fail safe (released when powered) lock. Fail
secure electric locks are normally not permitted
for use with the Securitron TSB on required exit
applications. NO contacts, however, are available from
the sensor for special signaling applications and for
integration with the Request to Exit (REX) function of
an access control installation, as will be explained.
Installation of the MOV in parallel with the electric lock.
The MOV is supplied loose with the Securitron TSB. It is
a black or blue disk-like component with two bare wires
for connection. The MOV acts to suppress the lock’s
inductive kickback which will greatly shorten the life of
the relay contacts if not suppressed. To work properly
it should be spliced in as close to the electric lock as
possible. It has no polarity. If, however, Securitron’s
Magnalock is used in the installation, the MOV is not
necessary as the Magnalock is internally suppressed.
When connecting power, polarity must be observed.
As an additional safety feature, the Securitron TSB
includes a low voltage sensing circuit. The unit will
keep working normally if input voltage declines until
it reaches roughly 9 volts. At that point, the Securitron
TSB will automatically act as if all power was removed.
If a lock is being controlled, it will release. Input
voltage could decline if the unit was being operated
on batteries and the batteries were discharging
or because of a fault in the power supply.
Cable
RED (+ Power)
BLACK (- Power)
WHITE (Relay Com1)
GREEN (Relay N.C.1)
MOV Magnetic Lock
+
–
+
–
Power Supply
12 – 24 Volts
Cable
RED (+ Power)
BLACK (- Power)
WHITE (Relay Com1)
GREEN (Relay N.C.1)
MOV
Cable
RED (+ Power)
BLACK (- Power)
WHITE (Relay Com1)
GREEN (Relay N.C.1)
MOV
Magnetic Lock
+
–
Magnetic Lock
+
–
+
–
Power Supply
12 – 24 Volts
Magnetic Lock
+
–
Cable
RED (+ Power)
BLACK (- Power)
WHITE (Relay Com1)
GREEN (Relay N.C.1)
MOV
Access Control
Rex Input
Access Control
Lock Control
Nc Contacts
BLUE (Relay Com2)
ORANGE (Relay N.O.2)
NC NC
+
–
Power Supply
12 – 24 Volts
Diagram 5 Typical wiring for one magnetic lock
Diagram 6 Typical wiring for multiple magnetic locks
Diagram 7 Double break wiring
NOTES: MOV not needed if Securitron magnalock used.
Power supply must always connect directly to sensor.
In power hook up, polarity must be observed.
The Securitron TSB has 6 colored wires which are for sensor power and DPST relay output:
Red + DC Power
Black – DC Power
White Relay Common, Pole 1
Green Relay Normally Closed, Pole 1
Blue Relay Common, Pole 2
Orange Relay Normally Open, Pole 2

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Double Break Wiring
Many installations include a controlled access device
such as a digital keypad or card reader. Such devices
typically have a REX (request to exit) input. When
dry contacts close on this input, the entry device will
open the lock for the same amount of time that is
programmed for entry. Use of the REX input for exit
has two benefits: you pick up timed exiting and also in
the case of most entry controls, the REX input must be
used for exiting to avoid an alarm condition at the door.
If the REX input alone is used for exiting a safety
reliability problem will exist. If the entry device
malfunctions, exit will not be possible and people
may be trapped. We therefore always recommend
double break wiring which is supported by the
Securitron TSB because of its two pole relay. The
Securitron TSB’s NC contacts are used to break power
to the fail safe electric lock while its NO contacts
trip the REX input of the controlled entry device.
This releases the lock a second time, hence the
term, “double break”. If the controlled entry device
fails for any reason, direct exit is still possible.
All Securitron Equipment Installation
Diagrams 6 and 7 show “generic” use of the Securitron
Touch Bar with any type magnetic lock and power
supply. Often, Securitron supplies all of these
products and the installer expects an interconnection
drawing for all Securitron products. We provide such
drawings in many of our manuals. In this case, the
replacement of the generic products shown above
with Securitron products is so simple as not to require
separate drawings. Just note that for any Securitron
Magnalock, the red wire denotes the “+” input and
the black wire denotes the negative. Remember that
you don’t need to install the MOV with any Securitron
Magnalock. Securitron offers a wide range of different
power supplies, so it is necessary to consult the
individual power supply manual to identify the DC
output terminals. Then connect the power supply
outputs to the rest of the system as shown above.
Adjusting Sensitivity
With wiring completed, sensor adjustment should be set.
NOTE: that the sensor board has a potentiometer on it
accessible when the bar’s end cap is removed (see Diagram 8).
The potentiometer has a small red LED light
installed in front of it that will aid you in adjusting
the sensitivity. The potentiometer on the sensor
will increase sensitivity when turned clockwise
and decrease it when turned counterclockwise.
1 TURN the pot clockwise without touching the bar
with a small flat blade screwdriver until you see
the red LED light turn on; you should also hear
the relay click off. In this condition, sensitivity is
so high that the bar is “sensing” all of the time.
2 SLOWLY ROTATE the pot counter-clockwise
until you see the red LED light turn off
(you should hear the relay click on).
3 THEN ROTATE another 15 degrees counter-
clockwise. This is generally a good setting.
4 BEFORE REPLACING THE END CAP, experiment
by touching the bar and observe that the
lock releases. Experiment with gloves if
you expect that they will be used. You
may want to increase the sensitivity
somewhat, but if you leave it just below
the point where it is continuously released,
you risk a condition where the unit will
fail by being released all the time.
Use of Redundant (Backup) Switch and Labels
A red push switch is mounted on the rear of the bar.
The purpose of this switch is to provide backup in case
of any malfunction or mis-adjustment of the sensor.
Pushing the button breaks the connection between the
WHITE (COM1) and GREEN (NC1) wires just the same
way as if the bar was touched. It therefore provides
a “hard” backup circuit break which will release the
controlled fail safe lock. It does not however affect the
COM2 and NO2 circuit (BLUE and ORANGE). If these
NO contacts are being used, for example, to provide
REX input to an access control system, pushing the
backup button will not achieve this, but egress safety is
maintained as with the switch mounted, there are two
independent controls which can release the door. In the
event that the sensor fails, the button will still work.
A label is supplied which should be affixed to
the bar (see Diagram 9) to draw attention to the
backup switch. Application of the label is particularly
important where people encounter the bar whom are
not familiar with it such as in a public occupancy. The
label includes two arrows owing to the uncertainty
of which end of the bar it will be mounted on.
A second label stating “PUSH TO EXIT” is also
shipped with the bar. If desired, this label can
be affixed to the front center of the bar itself in
order to prompt users that the bar (rather than
the door) must be pushed to gain egress.
E M E RG E NC Y
R E L E A S E
B U T T O N
Ring terminal makes
contact from sensor
to bar
Backup Push
Button
(on opposite side)
Cable Connector
(Male)
Circuit
Board
Potentiometer
with red LED in
front of it
Diagram 8 End view of
sensor/circuit board
Diagram 9 Emergency
Release Button

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Electric Lock Selection
Electric lock selection is important to obtain best
results from the Securitron TSB. The product allows
silent and immediate egress without the mechanical
action of traditional exit devices which require periodic
maintenance and replacement. Having no moving
parts, the Securitron TSB possesses an extended
operating life. The product was designed for use with
Securitron’s Magnalock. The Magnalock secures the
door with magnetic force only and therefore has no
possibility of jamming and thereby denying egress. The
Magnalock also has internal electronics which allow it
to release very rapidly. When used with the Securitron
TSB, which is also a fast device, exit is immediate and the
impression a person exiting gets is that the door is not
locked at all. Other magnetic locks generally operate
significantly more slowly than the Magnalock. This
makes egress less convenient as a person must pause
somewhat after touching the bar until the door releases.
Operational Security Considerations
Typical use of the Securitron Touch Sense Bar provides
free egress from the interior protected area. The
electric lock secures against unauthorized entry. It
is of important concern that persons on the outside
cannot activate the bar from the outside. This is a
common problem with other interior release devices.
For instance, if a panic bar with switch is used, it is
possible to trip it from the outside if the intruder can
introduce a coat hanger in between the door and
frame. Aluminum frame glass doors tend to allow this
more than other types. Similarly, microwave detectors
used on the inside can sometimes be activated
from the outside if the door is vibrated strongly.
The Securitron Touch Sense Bar is more secure with
respect to the outside. To assure this, however, the
user must be made aware of certain operational
characteristics. The sensor functions by setting up
an oscillating electric field which conforms along any
metal surface that contacts the sensor’s antenna wire.
In the Securitron Touch Sense Bar it is the bar itself
that carries the field. The electric field is disturbed by
the near proximity of ionized fluids within the body,
which form a conductive mass. It is this mass that the
bar detects. As a proximity device the bar is sensitive
to the closeness of the mass. For example, if a person
wearing gloves touches the bar with his finger tip,
the door will generally not release. When the gloved
hand is wrapped around the bar in normal use, the
door will release because the conductive mass of
the hand is in much closer contact with the bar.
The main security concern regarding outside entry
is if a person could introduce a metal wire from the
outside and make metal to metal contact with the
bar. The field could then propagate along the wire
and be activated by the intruder’s hand. In practice,
this is unlikely. The bar is anodized and therefore
insulated so it will not make contact with the wire. The
intruder would have to scratch away the anodization
which requires both effort and knowledge. Also
the field propagates weakly along a thin wire.
If, however, high security from the outside is critical
in the application, two steps should be taken.
1 The sensitivity of the bar should be set as low as
satisfies the exit performance requirements.
2 The insulation on the bar should be increased by
painting it. This significantly increases resistance
to scratching. Electrostatic (powder coat) paint
is recommended for greatest toughness.
Sensor Replacement
1 REMOVE THE END CAP on the sensor side. Remove
the cable connector from the circuit board.
2 REMOVE THE TWO SCREWS that connect
the end piece to the aluminum bar.
NOTE: that this will free the ring terminal that is
soldered into the board on the pad marked, “bar”. This
ring terminal is the way the sensor makes contact with
the bar. Slide the complete end piece out of the bar.
3 With the end piece now loose in your hand, PUSH
the circuit board farther into the end piece. The
direction is as if you were pushing it into the bar.
There will be some resistance from the wires that
connect the backup switch to the circuit board.
Push it only far enough to completely reveal
the rectangular body of the backup switch.
4 UNSCREW the cap that holds the backup switch
to the end piece. Push up the freed backup switch.
Now the complete sensor + backup switch can
be slid away from the end piece by continuing
to slide the board in the same direction.
5 To INSTALL the new sensor assembly,
reverse the procedure detailed above.
NOTE: that the wires that connect the backup push button
to the circuit board must be folded over in the center of the
board- inside of the potentiometer. If the wires are allowed
to fold outside the potentiometer, they will block access
to it and the board will not be able to slide fully forward.

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Troubleshooting
PROBLEM SOLUTION
The door will not
release when the
bar is touched
• To monitor operation of the bar, it is quite easy to see the red LED light
indicator and hear the relay click when the bar is touched.
•If the red LED does not turn on and you don’t hear a click, try the backup switch. If the door does not
release from the backup switch, it is almost certain that the overall wiring of the installation is at fault.
If the door releases from the backup switch, the general wiring is correct but the sensor is not reading
your touch. Make sure you understand section Adjusting Sensitivity on how to adjust sensitivity of
the bar. It may be set too low. Another fault could be that the sensor itself is not receiving 12-24 DC
power on the red and black wires. Check the power supply and, be sure the input polarity is correct.
Also, even if power is being applied on the red and black wires, it’s possible that it’s not getting into the
sensor. Check the connector block that plugs into the sensor card for loose wires. Finally, it is possible
that the ring terminal that connects the sensor to the bar itself has come loose. See Diagram 8.
•If the red LED does turn on and you can hear this click and the door does not release, try the backup switch.
If the door still doesn’t release, the problem must be in the installation wiring as it is nearly impossible to have a
failed sensor relay and backup switch at the same time. Review your wiring to make sure the sensor is correctly
applied in the circuit. If you see the red LED turn on and you hear the click but only the backup switch releases the
door, call the factory as the defect appears to be in the relay contacts and the sensor will have to be replaced.
The door remains
released constantly
•If you see the red LED turn on and hear a click when you touch the bar but the lock remains released, the
problem is probably in the wiring which should be reviewed to be sure the sensor is correctly applied in the circuit.
•If you see red LED on and don’t hear a click, the sensor is probably adjusted too high (review
Adjusting Sensitivity). Rotate the adjustment pot counter-clockwise while not touching the
bar. If this doesn’t lock the door, some effect is probably keeping the relay de-energized all the
time (remember: the relay is energized when the lock is secure to maintain fail safe operation).
•The most likely cause for the relay to remain energized is that the sensor “sees” an overwhelmingly large signal
as if someone was continually touching the bar. This will happen if the bar is not properly isolated from a metal
door. Because of the plastic end pieces, the intrinsic isolation of the bar from the door is many times greater than
it needs to be. Make sure that there is no “foreign object” creating a conductive path from the bar to the door.
An example would be metal blinds. The same effect will occur if the bar is used outside in the rain or if water is
flowing down the inside of the door. This overcomes the electrical isolation needed between the bar and door.
•Certain large electronic noise sources can “swamp” the sensor although this is rare. Examples
would include large radio or radar transmitters in the building or a high voltage neon sign mounted
within a few feet of the door. Call the factory if you suspect noise induced problems.
•Finally, in very rare instances, the sensor can “hang up” in a condition that continuously releases the
door. De-power the unit and turn the adjustment pot all the way counterclockwise. Then, re-power
the unit and note that the door locks. Then, readjust the sensor potentiometer normally.
Securitron TSB-3 Template Back

8 of 8
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Patent pending and/or patent www.assaabloydss.com/patents
Copyright © 2021, Hanchett Entry Systems, Inc., an ASSA ABLOY Group company.
All rights reserved. Reproduction in whole or in part without the express written
permission of Hanchett Entry Systems, Inc. is prohibited. 500-16410_6
Warranty
For information on warranty coverage and replacement options,
please visit assaabloyesh.com/warranty
Securitron
TSB-3 Template
Distance shown represents
38" [914.4 mm] Securitron
TSB-3 touch bar
• 42" [1066.8 mm] bar
add 6" [152.4 mm]
• 48" [1219.2mm] bar
add 12" [304.8 mm]
Securitron EL-TSB-3 Wireway
11/16"
[17.5mm]
FOR: FOR:
Secritron TSB-3 Wireway
3/8"
[9.5mm]
OUTSIDE
OUTSIDE
34-1/4"
[870 mm]
CUT ALONG THIS LINE
DO NOT photo copy template.
(Dimensions will change)