ABB DWTL1 - Digital Weekly Twilight Time Switch Installation Manual

ABB DWTL1 - Digital Weekly Twilight Time Switch Installation Manual

Also See for DWTL1:


ABB DWTL1 - Digital Weekly Twilight Time Switch Installation Manual

Packaging Content

  • Astronomical digital time switch DWTL1
  • Installation manual


Dimensions (mm)



Wiring diagram

DWTL1: 1 channel
Wiring diagram

Access to device

Access to device

Button Function
Turn on the display Access the menu ESC (one level back)
Decrease datum Previous menu Switching channel 1 Lock channel 1
Increase datum Next menu Switching channel 2 Lock channel 2
Confirm selection
Hardware reset
Random switching channel 1
Active cycle switching on channel 1

Display description

Display description

1 General indications
2 Time indication
3 Channel 1 status indication
Active manual program
+ Blocked switchings
+ Active random switchings
+ On/OFF (flashing): active cycle switchings
Active holiday program
Active pulse program
4 Day of the week (DAY) indication

First commissioning

Access the menu

Access the menu

Setting language

Setting language

Standard settings

Setting Description
Date Format: DD/MM/YY 1st day of the week: Monday
Astronomical coordinates Country: France City: Paris Latitude: North (48° 51' 36'') Longitude: East (2° 21' 00")
Daylight saving time (DST) change: active Start of daylight saving time (DST): last Sunday of March at 02:00 o'clock End of daylight saving time (DST): last Sunday of October at 03:00 o'clock
Time correction: Sunrise: +0:00 Sunset: + 0:00
Time zone +1:00 UTC
Parameters of the twilight probe Threshold: 100 lux Hysteresis: 10 lux Delay: 1 1 second
Random switchings: Minimum: 1 minute Maximum: 5 minutes
Cycle switching -ON duration: 1 minute -OFF duration: 1 minute
PIN protection Disabled (---)
Bluetooth Disabled (Password: 000000)

To activate Bluetooth interface, password must be set different from 000000 in the Bluetooth menu.

Initial page

Initial page

1 Information messages: day of the week, or product identification code and serial number, or battery status.
2 Date
3 Relay 1 status (ON/OFF)
4 Hour
5 Day of the week

If the DWTL1 switch is not powered from the mains, the information messages will show the text:

Menu description

Menu Description
Settings Allows to view and eventually modify the general operation settings as indicated in point 8.Settings.
Program Allows to create a new program, check created programs, change or delete a created program, copy all created programs of channel 1 on channel 2 and vice versa.
Bluetooth Allows to enable or disable the Bluetooth interface and to change the password used to associate devices
Hour counter Allows to display the hours of usage (relay on) of connected load(s).
Twilight Allows to set the operating parameters of the external probe
Reset Allows to restore the initial state of the device
Firmware menu Shows the firmware installed in the device



Setting Description
Language Language setting.
Date Date settings.
Time Hour, minute and time zone setting.
Daylight saving time Daylight saving time (DST) and winter time (CET) automatic setting.
Astronomical coordinates Setting of geographical coordinates of the installation place.
Random switchings setting It allows to set the minimum and maximum random switching duration of the channel where it is activated.
Cyclic function setting It allows to set the minimum and maximum switching cycle of the channel where it is activated
Protection PIN The protection code is used to lock the keyboard and prevent changes by unauthorized persons

"DBT Timer" app download

Connect the Smartphone to a time switch:

  1. Activate Bluetooth on the digital time switch;
  2. Activate Bluetooth on the Smartphone;
  3. To associate a new device, press the symbol in the upper right corner on the App;
  4. Select the device from the list;
  5. Insert the password to pair the device (default password must be changed).

With the APP it is possible to:

  • Create new program
  • Change settings
  • View parameters and create give a name to the device
  • Manually control the relay output(s) and activate the random and cyclic function

Priority list on/off

In case in which, on the same channel, on/off programs are provided with different period (daily or weekly) to carry out in the same day, only the program with the highest priority is executed.

Priority list on/off

From this example it's possible to see that the daily event on Monday is not carried out because in the same day it is provided the beginning of the week program (even if the daily program of Monday begins and ends before the beginning of the weekly program). Instead, the daily program of Sunday is carried out because it's the only one running for that day.

Holiday program

The holiday program just begins and ends exactly at the specified times.

Holiday program

Programs priority

The priority programs defines how DWTL1 manages the case in which programs with different period are running at the same time (1 indicates higher priority).

Programs priority - Part 1

* Date: s elect day, month, year (program carried "only once in the life of the product"). If the month is not specified, the program is carried out all days xx of all months of the specified year.

Technical data

Power supply [V] 230 Vac (-15% ÷ +10%)
Frequency [Hz] 50-60 Hz
Power consumption
DWTL1 2W (6 VA)
Back up battery Use only batteries of Lithium battery 3V, CR2032 (replaceable)
DWTL1 1 monostable changeover relay with maximum switchable load of 16A / 250 V
Parameters of the twilight probe threshold: 3 ÷ 500 lux hysteresis: 1 ÷ 50 lux delay: 1 second ÷ 30 minutes
Max cable section of terminal block 2,5 mm 2
Display LCD with backligthing (active with AC power supply)
Communication interface Bluetooth BLE 4.2 (active with main power supply)
Storable programs
DWA1 120 events
Operating temperature -20 ÷ 50°C
Operating humidity 20 ÷ 90% non condensing
Storage temperature -25 ÷ +70°C
Operating frequency bend 2400-2483,5 MHz
Maximum transmitted radio frequency power 4 dBm
Modules 2 DIN modules
Protection degree IP20
Insulation Reinforced between accessible parts (front) and all the other terminals.

DWTL1 can be configured as a switch"astronomical with probe" or as "programmable twilight". The following diagrams show the operation in the case.

The device leaves the factory configured as "astronomical with" and the set program 1.

Programs priority - Part 2

Astronomical operation during the night and with daytime switching on thanks to the twilight probe if the brightness falls below threshold.

Programs priority - Part 3

Programmable twilight operation with switching on when the brightness falls below the threshold and only if the programming requires it.

Hereby, ABB S.p. A. declares that the radio equipments type DWTL1 is in compliance with Directive 2014/53/EU. The full text of the EU declaration of

conformity is available at the following internet address:


The information in this document is subject to change without notice and should not be construed as a commitment by ABB. ABB assumes no responsibility for any errors that may appear in this document.

In no event shall ABB be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, nor shall ABB be liable for incidental or consequential damages arising from use of any software or hardware described in this document.

Working with high voltage is potentially lethal. Persons subjected to high voltage may suffer cardiac arrest, burn injuries, or other severe injuries. To avoid such injuries, make sure to disconnect the power supply before you start the installation.

Electrical equipment should only be installed, accessed, serviced and maintained by qualified electrical personnel.

For safety reasons it is recommended that the equipment is installed in a way that makes it impossible to reach or touch the terminal blocks by accident.

The best way to make a safe installation is to install the unit in an enclosure. Further, access to the equipment should be limited through use of lock and key, controlled by qualified electrical personnel.

Contact us

ABB S.p. A.
Electrification Business
Viale dell'Industria, 18
20010 Vittuone (MI) Italy

Installation nur durch elektrotechnische Fachkraft.

© Copyright 2020 ABB S.p. A. All rights reserved. Specification subject to change without notice.

Documents / Resources


Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download ABB DWTL1 - Digital Weekly Twilight Time Switch Installation Manual


Need Assistance?

Do you have a question about the DWTL1 that isn't answered in the manual? Leave your question here.

Error while submitting your question. Please, reload page and try again.

Thank you! Your question has been received!

Table of Contents