Operating Instructions
MIL 72 A/1 digi 42
MIL 72 E/1 digi 42
WA-EKF2921/10.97/S:MMS/D:Ko/80.10.0698.7/97/00538
1. Putting into operation
Electrical units may only be installed and assembled by a skilled
electrician. (The term "skilled electrician" is defined in VDE 0105).
Notes:
The unit contains well-designed electronic components which are
largely protected against external interference. However, it must be
remembered that extremely high interference voltage peaks can be
superimposed on the mains voltage, depending on the installation
site. Interference which, despite all internal protective measures, can
also effect an electronic unit also arises when contactors are switched.
In order to guarantee the greatest possible operational reliability, the
following details must be observed:
a) In the case of larger systems, a suitable varistor or RC element
must be used to provide interference suppression for contactor
coils directly switched by the time switch.
b) If inductive direct current loads are switched, a suppressor diode
must be installed.
c) Inductive loads and particularly fluorescent lamps place particular
demands on the output contacts. In each individual case, check
whether it is appropriate to install an isolating relay or contactor.
2. Assembly and connection
2.1 Sur face-mounting for the A version
Fit the base in accordance with local conditions.
2.2 Multi-terminal busbar with accessor y latch
Push the lock, article number 01.46.0036.6, onto the base. It must
engage. Break out a part of the casing as required (see diagram).
2.3 Flush-mounting for the E version
Push the unit into the recess from the front.
Push both securing latches (A) inwards with a screwdriver and turn
them clockwise. Push the supplied plugs (B) into the holes.
2.4 Connection for the E version
See unit imprint/circuit diagram
(6,3 mm flat connector in accordance with DIN)
2.5 Installation and connection with flush-mounting
base as an accessory for the E version
See 2.3 for installation.
Connect the flush-mounting base (D) in accordance with the unit imprint/
circuit diagram, attach it to the rear and secure it with the screws (E)
3. Sealing with sealing glass – IP 40
Seal using the accessory sealing glass – attach and seal the sealing
glass, article number 01.78.0016.6.
The sealing glass can only be removed with a suitable tool.
Summer time
and winter time
changeover
Hand switch
Reset
Enter
hours
Days of
the week
flash
Enter
minutes
Holiday
program
Enter
time
Enter
switching
time
A
B
A
B
D
E
Deselect days
of the week
Select days
of the week
article number
01.79.0002.2.
GB
4. Operating the time switches
The steps marked with the symbol are necessary to carry out a
switching program.
4.1 Reset
Press the "Reset" key with a pencil or similar
object. This sets the time switch to its basic setting.
– before every restart
– to delete all switching times and the time
(with the exception of the standard program)
The following appears after approximately 2 seconds:
4.2 Entering the time and current day of the week
After pressing the "Res" key (see 4.1):
During the summer time period: press the "±1h" key once.
Keep the " " key pressed during steps
,
and.
With the "h" key: enter the hours
With the "m" key: enter the minutes
With the "Day" key: enter the current day
1=Mo...7=Su
Release the " " key
The colon now flashes at one second intervals.
Note:
If the "h/m" keys are pressed for longer than 2 seconds,
the display will enter fast-forward scroll mode.
4.3 Entering the switching times
42 memory locations are available
Each switching time occupies 1 memory location.
Keep pressing the "Prog." key until a free memory
location "– – : – –" is shown in the display.
Select the switching functions " " (ON) or " " (OFF)
with the " " key.
With the
"h"
key: enter the hours
With the
"m"
key: enter the minutes
If a switching command is to be executed every day,
proceed with step . If 1 switching command is to be
executed only on one day or on cer
tain days skip step
and continue with step .
Save with the "Prog." key or
With the "Day" key, select 1 day on which the switching
command is not
to be carried out (cursor flashes)
Confirm this day with the "Sel." key
(day of the week and cursor flash)
Press the "Day" key (day is deselected).
Repeat steps , and for every day to be deselected.
Save with the "Prog." key (the next free
memory location is displayed) or
Save with the " " key.
The time switch goes over to automatic mode and displays
the current time.
Begin every additional switching time and the associated
switching state = ON or = OFF again with 4.3.
Note:
If an input is incomplete, the segments still not selected
are displayed flashing
If you have deselected a day on which the
switching command should be carried out,
Reselect the deselected day with the "Day"
key (day of the week and cursor flash).
Confirm this day with "Sel." (cursor flashes).
Press the "Day" key (day is reselected).
Save with the "Prog." key
(the next free memory location is displayed) or
Save with the " " key.
5.4Changing the programmed switching times
Keep pressing the "Prog." key until the switching
time to be changed is displayed.
The new data can then be entered as described in Point 4.3.
Note on saving switching times:
If programming is not
completed with the " " key
after the switching time is entered (1.4), the
complete switching command is still automatically
saved after approximately 90 seconds. The time
switch then changes to automatic mode and shows
the current time again
5. Additional functions
5.1 Summer time and winter time setting
● Press the "±1h" key once.
5.2Manual switch " "
The current switching state can be changed at any time with the
" " key.
Use of this manual override facility does not alter any of the
programmed information.
Automatic Mode Manual Mode
Continuous Operation
= ON
= OFF
= OFF
= ON
= Continuous ON
= Continuous OFF
The switching If the current You can only return
times correspond switching state is to automatic mode
to the entered changed manually, from the and
program. the next switching switching modes
command is by pressing the
again executed " " key.
automatically
according to the
entered switching
program
5.3Reading the programmed switching times
Press the "Prog." key several times:
– displays all entered switching times star ting
with the first memory location.
– the first free memor y location
"– – : – –" is then displayed.
– the number of memor y locations still free is then
displayed
If the memory locations are occupied, the following
appears in the display: "FR "
Press the " " key:
The time switch changes to automatic mode and displays the
current time.
5.5Deleting individual switching times
Keep pressing the "Prog." key until the switching time to be
deleted is displayed.
Set to "– –" with the "h" or "m" key and then press the
" " key for about three seconds.
The switching time is deleted and the current time is displayed
after the key is released.
5.6AM/PM time display
If the "±1" key and the "h" key are pressed simultaneously,
the time display is switched to AM/PM mode (used mainly in
English-speaking countries).
5.7Holiday program
Note:
The holiday program has priority over the standard week
program. The holiday program can only be entered if all
seven days of the week (1234567) are selected.
Cursor of the
current day of
the week flashes
Ho = Holiday
Image I
Enter switching times for the holiday period as
described under 4.3. Whilst programming, the " "
key must be pressed to denote a holiday instruction.
The " " key must be pressed for each switching time.
Next, save the holiday switching times with the "Prog." or
" " key..
Entering the start and duration of the holiday
program
After entering the switching times for the holiday program
Press the " " key once. The following image appears:
If the holiday program is to start on a different day to the
current one – max. 6 days ahead – use the "Day" key to
select the day on which the holiday program is to commence.
If the holiday program is to be executed for up to max. 99 days,
continue with steps +.
If the holiday program is to be executed for an unlimited period,
leave out step and continue with step .
Enter the required number of holiday days with the "Sel."
key (1 to max. 99).
Press the " " key to save the entries.
If the current day of the week was entered as the holiday
program start, the following appears:
d = day
number of
entered
holiday days
Image II
Image II remains until the holiday days have passed,
for example d:10, d:09, d:08 .......... etc.
Pressing the " " key again and holding it down now allows the
day of the week, the time and the cur
rent switching state –
" "= ON or " "= OFF – to be checked.
If a day of the week other than the current day was entered as
the holiday program start, the current time is displayed after the
" " key is pressed. The holiday program is then started at
midnight at the start of the selected day of the week and its
duration is displayed (Figure II)
After the programmed holiday days have expired, the current
time appears in the display.
Aborting the holiday program prematurely
If the holiday pr
ogram has already started:
● Press the " " key once
If the holiday pr
ogram has not yet started:
● Press the " " key twice
6. Technical data
Connection see unit imprint
Switching capacity see unit imprint
Ambient temperature –10 °C to +55 °C
Running reserve 150 h at +20°C
Memory locations 42
Shortest switching time 1 min.
Programmable every minute
Protection IP 20
Note:
Note what position the switch is in, ON or OFF .
Depending on the switching program and the time
of day, select the desired switch position with the key .
(For channel 1 and/or 2) e.g.
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