Securitron TSB_Series - Manual (Page 7)

PN# 500-16410
Page 7
Rev. E, 02/12
FIG. 6: END VIEW OF SENSOR/CIRCUIT BOARD
3.6 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 misadjustment 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 drawing to
the right) 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.
4. ELECTRIC LOCK SELECTION
Electric lock selection is important to obtain best results from the 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 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 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.
5. OPERATIONAL SECURITY CONSIDERATIONS
Typical use of the 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 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
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.
E M E R G E N C Y
R E L E A S E
B U T T O N