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200W      200W       1600W         200W         1600W        900W

Safty notes

• Installation of these products should only be undertaken by a qualified electrician.
• The operational and electrical safety is only guaranteed, if the product is installed using its proper 

accessories, in a position as specified in the installation instructions.

• Any interference with the product makes the guarantee void.
• If the time switch is mounted near equipment where heat produced raises the local ambient above 55°C. Then a space should be put 

between the time switch and the equipment.

Function

The MicroRex D22 is a microprocessor controlled digital time switch. Eight programs of your choice can be stored and used to control the automatic operation of your electrical equipment. Each indi-
vidual weekday can have a separate program or you can have several days operating on the same „Block“ program. To program the MicroRex D22 a „picture“ is used and when this is complete the
chosen times are stored in the microprocessor memory. The MicroRex D22 makes available 2 separate switching channels. The summer-/winter changeover can be programmed for hand or automa-
tic operation.

State of output

= On
= Off

±

 1h      C

S       OK

R

1

2

Hand switch
Channel 1

Channel 2

Choose function

Summer- / winter 

changeover

Setting the hours, minutes,

days and channels

Delete

Fixing the hours, minutes,
days, channels and
continuous switching

Programming Buttons

1

2

1 2 3 4 5 

6 7

Actual or „On“ time

Weekday

Day number

„Off“ time

Symbol for 
„Set actual time“

„Off“ days

Liquid Crystal Display

Technical data

Supply voltage: 

230V 50/60Hz

120V 50/60Hz

Consumption:

ca. 0,6W

Contact rating: 

2 changeover contact 10A 250V~µ cos 

ϕ

= 1

Parallel compensation: not allowed
Accuracy: ±2,5s/d
Terminal capacity:

single strand

multi strand

4 mm

2

2,5 mm

2

Program pictures: 

8

Battery reserve:

100h

Storage ambient:

-10°C to +60°C

Working ambient:

-10°C to +55°C

Time switch

NT 29 17 87 02

MicroRex D22

S

OK

+

Presentation

Approximately 30 seconds after the supply voltage is connected the symbols
appear on the LCD. 

Before any operations the complete memory must be reset.

2. Memory reset

1. Starting

This can only be done after a Reset.

Summer- / winter changeover can be made manually or automatically if set.
If manual changeover is required choose no during the date input. Automatic changeover
depends on your country / area. Choose the appropriate setting for your country / area.

3. Setting date and summer- / winter changeover

L

N

6    7    8

3   4    5

1    2

Connection

press both at 
the same time

The time switch memory is completely clear.

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