Lovato TMAST is a single-module 220–240 V AC astronomical time relay with automatic sunrise and sunset calculation, integrated RTC, one normally open relay output and NFC programming via the LOVATO NFC App.
£95.18
The Lovato TMAST is a compact and advanced astronomical time relay with integrated real-time clock (RTC) designed for automatic control of electrical loads according to calculated sunrise and sunset times. As part of the Lovato modular time relay range, it automatically calculates astronomical switching times from the configured geographical location, making it ideal for lighting and other applications that need to operate between sunset and sunrise.
The TMAST incorporates NFC connectivity, allowing parameters to be programmed using a compatible smartphone or tablet and the LOVATO NFC App. Date, time and geographical coordinates can be acquired directly from the mobile device during configuration, while automatic daylight-saving-time management reduces the need for seasonal manual adjustments.
With a 220–240 V AC auxiliary supply, one delayed normally open relay output and a compact single-module DIN rail housing, the TMAST provides a modern solution for astronomical load control. An integrated RTC with backup battery maintains date and time when the supply is absent, while zero-crossing load switching technology supports reliable operation in commercial, industrial and building-service applications.
Astronomical time relays such as the Lovato TMAST automatically determine sunrise and sunset times according to the geographical coordinates programmed into the device. This allows connected loads to be switched according to natural daylight conditions without relying on an external light sensor or requiring fixed switching times to be manually adjusted as daylight hours change throughout the year.
The TMAST simplifies commissioning through NFC programming with the LOVATO NFC App, which can transfer date, time and geographical coordinates from a compatible smartphone or tablet. Its integrated real-time clock, backup battery, automatic daylight-saving-time management and programmable astronomical functions make it particularly effective for automated lighting and building-service installations.
| HS Code | 91070000 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | Modular Time Relays |
| Model | TMAST |
| Product type | Astronomical time relay |
| Function | Automatic sunrise and sunset calculation |
| Programming mode | NFC / LOVATO NFC App |
| Rated auxiliary supply voltage Us | 220–240 V AC |
| Rated frequency | 50/60 Hz |
| Operating voltage range | 0.85–1.1 Us |
| Maximum power consumption / dissipation | 7 VA / 1 W |
| Time setting range | 0.1 s–999 days |
| Number of relay outputs | 1 |
| Contact arrangement | 1 delayed N/O |
| Maximum switching voltage | 250 V AC |
| IEC conventional free-air thermal current Ith | 8 A at ≤40 °C |
| Rated insulation voltage Ui | 250 V |
| Rated impulse withstand voltage Uimp | 4 kV |
| Mechanical life | 30,000,000 cycles |
| Electrical life at rated load | 100,000 cycles |
| Operating temperature | -20 to +60 °C |
| Storage temperature | -30 to +80 °C |
| Housing material | Self-extinguishing polyamide |
| Number of DIN modules | 1 |
| Mounting type | 35 mm DIN rail |
| Protection rating | IP40 front / IP20 terminals |
| Dimensions (W × H × D) | 17.5 × 104.7 × 64.9 mm |
| Product weight | 70 g |
| Standard | IEC/EN 61812-1 |
The TMAST is an astronomical time relay used to automatically control electrical loads according to calculated sunrise and sunset times for a configured geographical location.
The TMAST features NFC connectivity and can be configured using a compatible smartphone or tablet with the LOVATO NFC App.
The TMAST operates from a rated auxiliary supply of 220–240 V AC at 50/60 Hz.
Yes. The TMAST automatically calculates sunrise and sunset times from the configured geographical coordinates and can automatically manage daylight-saving-time changes according to the selected time zone.
The TMAST occupies one DIN module and is designed for installation on a standard 35 mm DIN rail, making it suitable for compact electrical distribution and automation panels.
Lovato Electric time relays provide electrical installers, panel builders and automation professionals with precise and flexible timing solutions, while the TMAST adds intelligent astronomical control, NFC programming and automatic sunrise and sunset calculation for modern lighting and building automation systems.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...