Operating Instructions
MIL 72 A/1 digi 42
MIL 72 E/1 digi 42
WA-EKF 2921/10.97/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 Surface-mounting for the A version
Fit the base in accordance with local conditions.
2.2 Multi-terminal busbar with accessory 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
.
(43 pages)
(24 pages)
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