Securitron TSH, Installation And Operation Instruction Manual

Page: 3 / 8

Rev. 8/00 Page- 3
2.6 MOUNTING THE HANDLE TO THE PLASTIC BASE
Reinstall the handle on to the base by using the two large flathead Phillips screws. You will be
later sliding a plastic plaque into the handle but don’t do this yet. You will first need to wire the
unit and then adjust the sensitivity.
3. ELECTRICAL CONNECTIONS
3.1 SENSOR WIRING
The TSH 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
The relay has 2 amp contacts and when the handle is touched, the relay energizes. Note that the
contacts will also switch if the TSH loses power. For additional safety, the
operation of the TSH
is fail safe , itself. When the TSH receives power, its control relay automatically energizes. It
deenergizes when the unit is touched. For applications releasing an electric lock, Figure 3 shows
typical connections of sensor, power supply and fail safe (locked when powered) electric locks.
Fail secure electric locks are normally not used with the TSH on required exit applications. N.O.
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. Note installation of the MOV in parallel with the electric lock. The MOV is supplied
loose with the TSH. It is a black or blue disk-like component with two bare wires. The MOV
suppresses inductive kickback from the lock which shortens the life of the relay contacts if not
suppressed. 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.
FIG. 3: TSH WIRING FOR FAIL SAFE ELECTRIC LOCK
The sensor operates on 12-24 volts DC and is normally powered by the same power supply that
operates the electric lock.
When connecting power, polarity must be observed. Note that the
sensor draws 40 mA when "at rest" and 25 mA when it is releasing the lock. As an additional
safety feature, the TSH 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 TSH 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)
POWER SUPPLY
12-24 VDC
+
MOV
MAGNETIC
LOCK
NOTE 1: MOV NOT NEEDED IF SECURITRON MAGNALOCK USED
NOTE 2: POWER SUPPLY MUST ALWAYS CONNECT DIRECTLY TO SENSOR.
NOTE 3: POLARITY MUST BE OBSERVED WHEN CONNECTING POWER.
OTHER CONTROL SWITCHES SHOULD BREAK OR PARALLEL RELAY CONTACTS AS NEEDED.