What is an Astronomical Time Relay and How to Install It?

Astronomical time relays automatically calculate sunrise and sunset times using geographic coordinates (latitude/longitude) or the specific city name. They allow for the control of systems without the need for any external sensors.

• Flexible Programming: Offers up to 32 programs that can be configured separately for each day of the week.

• Easy Installation: Programmable via the integrated LCD screen or on a computer using the DTR-PROG software.

• Fast Transfer: Parameters can be transferred quickly between devices via a contactless Infrared (IR) connection.

• Remote Monitoring: Models equipped with Modbus RS-485 communication allow for remote control via the Entbus software.

• Data Protection: Integrated backup reserves prevent the loss of date, time, and program settings during power outages.

  
  

  Connection and Installation (DTR-10 to DTR-20)

  For the precise operation of astronomical relays (from DTR-10 to DTR-20), connections must follow the specific requirements of each model.

  
  

  Power Supply

  • Energy is connected to terminals $L$ and $N$.

  • Settings are preserved during power cuts thanks to a replaceable battery.

  
  

  Relay Outputs

  • DTR-10 and DTR-10t: These models feature one 16A relay output.

  • DTR-20, DTR-20S, and DTR-20TS: These models offer two 16A relay outputs for the independent control of two separate circuits.

  
  

  Communication and Programming

  • DTR-20S and DTR-20TS: Feature integrated Modbus RS-485 communication for remote monitoring.

  • DTR-10t and DTR-20TS: Allow for fast, contactless parameter transfer via Infrared (IR).