# STL-VS

Specialized 433 MHz radio modem kit for filling station price pylon data transmission.

Canonical URL: https://stl.voscom.online/

## Purpose

STL-VS is used when fuel price data must be transmitted from a filling station control system or operator PC to a fuel price pylon display without laying a long cable line to the pylon.

The kit is intended for industrial filling station infrastructure and consists of two devices:

- STL-VS-USB/RS232 transmitter module
- STL-VS-RS485 receiver module

The transmitter receives data from the control system or operator workstation and sends it over a 433 MHz radio channel. The receiver sends data to the price display over galvanically isolated RS-485.

## Integration And Operation Capabilities

- Control systems and display protocols: Topaz-AZS integration through a background driver, support for Nefteprodukttekhnika, VSD, and Impuls display protocols, plus transparent pass-through mode for non-standard data streams over USB / RS-232 / RS-485.
- Pylons without RS-485: IR emulation mode can place the receiver inside the pylon and use an external IR LED near the existing display IR receiver.
- Smartphone and PC control: BLE connection can be used for configuration and price control through a smartphone or PC application with PIN protection.
- Relay mode: an intermediate relay modem can be added for remote pylons or sites with difficult construction conditions.
- Monitoring and OTA updates: modem status, signal level, and data transmission status can be monitored through web services when internet access is available; firmware updates can be delivered through a protected channel.

## Main Specifications

- Frequency band: 433.075-434.750 MHz
- Channel spacing: 125 kHz
- Transmitter power: not more than 10 mW
- Transmitter power supply: +5 V from USB
- Receiver power supply: 12-24 V from the existing fuel price display power supply
- Receiver interface: galvanically isolated RS-485
- Ingress protection: not less than IP65
- Operating temperature: from -40 to +50 C
- Weight: approximately 160 g per device
- Dimensions: 100 x 88 x 40 mm including cable glands
- Practical range: up to 300 m for a typical site; longer distances may use directional antennas

## RF Notice

The standard configuration uses 433 MHz antennas. Replacing the antenna with a model that has a different gain is allowed only with correct transmitter power adjustment and compliance with applicable regulatory limits.

## Documents

- Product passport: /docs/stl-vs-passport.pdf
- Voluntary certificate: /docs/stl-vs-certificate-voluntary.pdf
- EAEU declaration: /docs/stl-vs-eaes-declaration.pdf
- Configuration manual: /docs/stl-vs-manual.pdf
- Configuration software: https://stl.voscom.online/downloads

## Certification

- Declaration: EAEU N RU D-RU.RA02.V.93437/26
- Voluntary certificate: ROSS RU.32001.04IBF1.OSP28.97523

## Manufacturer, MWOS, And Certified Installers

- VOSCOM.ONLINE is the manufacturer of STL-VS.
- STL-VS is based on the MWOS operating system and is certified by VOSCOM.ONLINE for use on industrial sites of this type.
- Equipment is supplied and commissioned through the manufacturer or certified installers
- Certified installers shown on the site include VOSCOM.ONLINE and Germes LLC, Saint Petersburg: http://germes-azs.ru/index.php/contact.html

Radio modems of this class can also be adapted for other industrial sites where control data or telemetry must be transmitted reliably without laying a cable line.

## Photos

- Fuel price pylon photo: /img/stl-pylon.jpg
- STL-VS device photo: /img/stl-device.jpg
- Installed receiver block inside a filling station pylon: /img/stl-installed-block.jpg

## Contact

- Company: VOSCOM-ONLINE LLC / OOO VOSCOM-ONLINE
- Email: 5022826@gmail.com
- Phone: +7 (925) 502-28-26
- Main website: https://voscom.online/ru

## Machine-Readable Files

- LLM index: https://stl.voscom.online/llms.txt
- Full LLM context: https://stl.voscom.online/llms-full.txt
- Dynamic markdown: https://stl.voscom.online/llms.php
- JSON context: https://stl.voscom.online/llms.php?format=json
- Sitemap: https://stl.voscom.online/sitemap.xml
- Robots policy: https://stl.voscom.online/robots.txt