Operating instructions
Time switch for DIN rail
Item no. 2144021
Intended use
This product is a time switch for controlling electrical systems. The time switch has 20 program-
mable memory spaces in blocks (on/off). Manual switchover of the time display from summer
to winter time and vice versa as well as time correction factor adjustment are possible. A count-
down timer can also be set. The time switch is designed for standalone installation in a control
cabinet by means of a symmetrical 35 mm profile in accordance with EN 60715 (DIN rail).
This product is intended for indoor use only. Do not use it outdoors. Contact with moisture (e.g.
in a bathroom) must be avoided under all circumstances.
For safety and approval purposes, do not rebuild and/or modify this product. Using the product
for purposes other than those described above may damage the product. In addition, improper
use can cause hazards such as a short circuit, fire or electric shock. Read the instructions ca-
refully and store them in a safe place. Only make this product available to third parties together
with its operating instructions.
This product complies with statutory, national and European regulations. All company and pro-
duct names contained herein are trademarks of their respective owners. All rights reserved.
Package contents
• Time switch
• Operating instructions
Up-to-date operating instructions
To download the latest operating instructions, visit www.conrad.com/down-
loads or scan the QR code on this page. Follow the instructions on the web-
site.
Explanation of symbols
The symbol with the lightning in a triangle indicates that there is a risk to your health,
e.g. due to an electric shock.
The symbol with an exclamation mark in a triangle is used to highlight important
information in these operating instructions. Always read this information carefully.
The arrow symbol indicates special information and tips on how to use the product.
Safety information
Read the operating instructions and safety information carefully. If you do not
follow the safety information and information on proper handling in these ope-
rating instructions, we will assume no liability for any resulting personal inju-
ry or damage to property. Such cases will invalidate the warranty/guarantee.
a) General information
• Protect the product from extreme temperatures, direct sunlight, strong jolts, high
humidity, moisture, flammable gases, vapours and solvents.
• Do not place the product under any mechanical stress.
• This device is not a toy. Keep it out of the reach of children and pets.
• Always comply with the accident prevention regulations for electrical equipment
when using the product in commercial facilities.
b) Installation
• The installation work may only be carried out by a qualified expert familiar with the
hazards involved and with the corresponding regulations.
• Before connecting the device, turn off the power circuit to which the device is to
be connected. Remove the corresponding main fuse or loosen the automatic fuse.
• Ensure that all corresponding cables are dead. Ensure that the cables are isolated
and that the contact points are covered. Never use bare wires for the connection.
• The device is protected internally against interference by means of a protective
circuit. Despite these protective measures, very strong magnetic fields may impair
its function.
• Interference can be avoided by observing the following installation rules:
- Do not install the device near to inductive loads (e.g. motors, transformers or
contactors).
- The power should be supplied via a separate mains circuit (with a mains filter
if required).
- Inductive loads must be equipped with protective devices to reduce overvolta-
ges (varistors, RC filters).
• Check whether interference signals are emitted when the time switch is used to-
gether with other devices in a system.
c) Connected devices
• Always observe the safety information and operating instructions of any other de-
vices which are connected to the product.
Product overview
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Installation and connection
1. Mount the time switch on a DIN-compliant rail. Carefully pull
the locking lever downwards slightly. Click the lock onto the rail
and let go again.
2. Connect the time switch according to the connection diagram.
Clamp the connecting wires in place. Use a Phillips screwdriver
to tighten the screws.
Operation and programming
• Open the cover to reveal the controls.
• Close the cover when you have finished configuring the settings.
a) On/off and reset
• Press the RESET button (2) to switch the time switch on if nothing is displayed on the LC
display (8). All display elements appear briefly and the clock starts.
• Press the RESET button when the time switch is in use to reset the settings.
• To switch the time switch off, press and hold the D+ (5) and H+ (9) buttons for approx. 3
seconds. All settings except the time correction factor, operating time and switching times
are deleted.
Basic settings
Open the cover to reveal the controls.
Setting the current time
1. Press and hold the button (3) and press the H+ button (9) to increase the hours incremen-
tally. Press and hold the H+ button continuously to increase the hours in quick succession.
2. Press and hold the
button and press the M+ button (10) to increase the minutes in-
crementally. Press and hold the M+ button continuously to increase the minutes in quick
succession.
(3) and D+ (5) buttons to switch through the loop of possible weekday settings.
3. Press the
4. Press and hold the M+ button continuously to switch through the week setting symbols in
quick succession.
5. The time switch is factory set to 24-hour format. To switch to 12-hour format, press and
hold the
button for 5 seconds. The 'AM' or 'PM' symbol for before noon or afternoon is
displayed on the LC display (8).
6. To return to 24-hour format, press and hold the
'PM' symbol disappears from the LC display and the time switch returns to 24-hour mode.
b) Setting switching intervals
• A total of 20 switching intervals can be set and stored. A switching interval consists of a
switch-on and switch-off time: ON/OFF.
The settings for ON/OFF switching times cannot overlap and must follow the natural
timeline. If overlap does happens, e.g. the switch-on and switch-off time are the
same, 15.00 hrs on/15.00 hrs off, the time switch switches the current at the relay
output on at the switch-on time before switching it off again after 15 seconds. In the
event that you connect an appropriate audible or visual warning device to the output,
a corresponding warning signal is emitted.
1. Press and hold the
button (4) for approx. 1 second to switch to the switch-on time of
the first programme. The 'ON' symbol is displayed on the LC display (8) with the memory
number of the switching interval.
1 Load connection
2 RESET button
3
button
4
button
5 D+ button
6 LED indicator
7 Operating voltage connection
8 LC display
9 H+ button
10 M+ button
11 MANUAL button
button again for 5 seconds. The 'AM' or
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