Specifications

T4.27
Digital timers
T4
Cycle/Impulse function
Generating a impulse-train with short pulses and a
short pauses with a standard timer would consume
a huge part of the timer’s free programming space.
For example: changing the output of a timer once
per second during 10 minutes, would require 600
programming steps. On top of that, the shortest
switching time must not be longer than 1 second.
For this kind of application, except for the most
simple ones, all timers have a build in Cycle /
Impulse function.
With this function, the duration of the impulse
(output relay switched to the on-position) and the
total period or cycle (duration of the impulse and
pause together) can be defined. This sequence is
repeated as long as the channel for which this has
been programmed is active (see fig.4).
In this way, instead of 600 programming steps for
the above application, only 2 are required: one that
activates the channel with this function, and one
that deactivates it.
Remark
The impulse function can be used on its own as
well, thus without using it in a cycle. In this case
only one programming step is used for 2 events:
switching the respective output to the on-state and
switching it back to the off-state after the duration
of the impulse has elapsed.
Random function
When activated, this function switches the output in
a random way. Often this feature is used to simulate
someone being present in a house, while actually no
one is (i.e. during holidays).
Clear function
This function allows the programmer to delete one
program step without having to reprogram all
subsequent steps. Subsequently pushing this
button removes all programmed switching events
from the memory.
Reset function
The actual time can be reset to 00:00 by simply
pushing the reset button on the front of every timer.
Resetting a Galax timer does not delete the
programmed switching times.
Calendar/Holiday function
The yearly programmable timers have the possibility
to repeat a switching program during a certain
period.
i.e. programmed heating and lighting of a workshop:
- Lighting from 7:30 till 15:45, all year around except
for the summer- (July 15 till August 15) and
Christmas-holidays (i.e. December 25 till January
3), for the official holidays and also except for the
weekends;
- Heating from 7:05 till 15:50, only during the
heating-season (i.e. from October 1 till April 15),
and obviously not during the Christmas-holidays
(i.e. December 25 till January 3), the weekends
and the official holidays.
DCF-77
When the accuracy of a timer is not high enough,
the Frankfurter atom-clock can be used to
synchronise the timer in order to virtually reduce the
time-error to 0.
This atom-clock transmits the so-called DCF-77
radio signal (= message that includes all time and
date related info).
By connecting the appropriate antenna to the timer
(see fig.5), the signal is received and automatically
the timer is synchronised at all time.
Running reserve
The time during which a timer can continue to run
without being externally supplied with power is called
the running reserve. Except for the GLX Q 11 W 42, all
Galax timers have a built-in lithium battery guaranteeing
a running reserve of 3 or 6 years from factory.
CHANNEL x ACTIVE
OUTPUT SIGNAL
PULSE/CYCLE
DEFINITION
IMPULSE
CYCLE
fig.1
fig.2