Features T 01N
TECHNICAL FEATURES AND
REGULATIONS
DIP-SWITCH SET UP
It is used to programme the conditions
of the device. It must be set for before
any other operation.
SP
Length of the period of the timer,
adjustable by screwdriver on the
front.(divided in 10 parts). The full
scale range is selected by the dip
switches DS1 1-6 (See in Tab. A).
TC
Timer (0,5÷15 sec) adjustable by
screw-driver on the front. It is activated
by closing the contact ENABLE (pin 4-
8). It keeps the T 01 out of operation
for the set period TC, in order to allow
a slow system to reach the regular
speed.
ENABLE: (pin 4-8)
The contact ENABLE activates the
device during the required phases of
machine operation: For instance if it is
a contact of the motor contactor, the
duty cycle is represented by the
diagram of fig. 2 as follows:
The relay energizes when the device
is supplied; the ENABLE contact is
opened and no alarm condition takes
place even in absence of pulses.
The motor starts up, the ENABLE
contact closes, the pulses appear, the
relay remains ON.
During the closing of the ENABLE
contact the pulses fail or slow down,
the led “A” lights and the relay changes
over. The reset takes place by
pressing the push button RESET or
momentarily close a contact between
pins 2-10 (telereset) (if the dip-switch
DS2-1 is to the right.).
The ENABLE contact opens and the
pulses fail; the relay remains ON and
no alarm condition takes place.
When the device makes the motor
stop, it is possible to know if the stop is
due to the operator or to an alarm
condition.
MODE OF OPERATION
Reference is made to paragraph
ENABLE. Generally the pulses are
given by the straight-line movement or
by the rotation of disks with holes
around the circumference or wheels
with teeth etc as per fig. 4 and 5. The
minimum duration of the pulse must be
>30µs.
The device is influenced only by the
edge of the pulse; when the shaft is
stopped it does not make any
difference if the device sees metal or
hole.
After the contact ENABLE is closed,
the first pulse must appear within the
TC set period.
SETTING
SP is selected on the base of the
frequency of the pulses.
Ex.: it is requested to detect when a
shaft turning at 200 RPM slows down
to 10 RPM
by the application of a disk giving one
pulse per revolution, in correspondence of 10 RPM there are 10
pulses/min so that the period between
two pulses TP, is 6 sec. It is necessary
to select the range of 20 sec. and fix
the knob after the third step, since SP
fixed by the knob must be higher than
the period of the pulses (obviously at
200 RPM TP is lower than 6 sec and
SP will be even higher). In case of
sudden shaft stop, the device needs
the time SP to detect the pulses failure.
By the application of a wheel (with
teeth on the circumference) giving 30
pulses per each revolution, 30x10 =
300 pulses/min; TP = 60/300 = 0,2sec.
The selected range is 500 msec; the
knob is set on step 5 (0,25 sec). In
case of sudden shaft stop, it is
necessary 0,25 sec for the system to
detect the pulses failure.
POSITIVE SAFETY
(dip-switch 2 n. 4 to the left).
In presence of the pulses the relay is
ON; when the relay is broken or the
supply fails, the relay goes OFF.
INSTALLATION ELECTRIC WIRING
As per fig. 6.
(Wiring to an electrical board with a
differential relay and a sectionalizing
switch).
The length of every wiring must be less
than 30m.
OUTPUT
5A 230Vac resistive load
5-7 NO
5-6 NC
SUPPLY: 2VA - 50÷60Hz
Tolerance: ±10%
1-11: 230 Vac or 115 Vac or 24 Vac or
Vdc on request.
WORKING TEMPERATURE: 0÷70°C
SIZE: 48x96x90 mm -
undecal male base.
Accessories available on request:
E 171 : hooks for flush mounting.
E 172 : undecal female base for DIN.
M 13A: plexiglas protection IP 54-tight
closure (for flush mounting).
E 346 : hold wire protecting from
vibrations.
Template:45x92 mm
WEIGHT: kg 0,300 COLOUR: black
RANGES
Selected by the DS1-1÷6
