The EM-125 is a Wi-Fi-enabled multifunctional timer relay (smart plug) manufactured by NOVATEK-ELECTRO LTD. It is designed for home automation, allowing users to control loads according to a schedule or manually, while protecting them from voltage anomalies and power overloads.
Quality management system for product development and manufacturing complies with ISO 9001:2015 requirements
Dear Customer,
NOVATEK-ELECTRO thanks you for purchasing our product.
After carefully studying this Operating Manual, you will be able to use the product correctly. Keep this Operating Manual throughout the entire service life of the product.
The multifunctional timer relay EM-125 (hereinafter referred to as the product or EM-125) is a microprocessor device designed for home automation — a smart plug.
EM-125 allows you to turn on/off loads according to a schedule or manually, while simultaneously protecting the load from various voltage emergencies and power overloads.
After registration on the “my.overvis.com” server, control and configuration of EM-125 is possible from anywhere in the world with an internet connection.
EM-125 accumulates energy consumption statistics in real time and sends the accumulated data to the “my.overvis.com” server, allowing you to view saved reports for a week, month, or year.
You can save electricity and reduce your costs by using EM-125 to control heating and ventilation equipment according to a pre-planned schedule.
EM-125 connects to the user-specified access point, performs measurements and monitors mains parameters (voltage and current) to protect the load according to the user-defined schedule.
In case of an emergency (current or voltage value exceeding the set level, voltage dropping below the set level), the product performs emergency load disconnection.
If the user manually changed the load state from the front panel or remotely via the “my.overvis.com” server, EM-125 blocks the execution of the current scheduled event and switches to manual control mode.
After the next scheduled event occurs, EM-125 returns to normal operation mode.
The manual control state is remembered even after the product is disconnected from the mains.
In Wi-Fi connection setup mode, EM-125 creates its own access point named “EM-125_xxxxxxxx”, where xxxxxxxx is the unique product code.
The user, by connecting to this access point and using a web browser (Opera, Google Chrome, Firefox, etc.) to navigate to “http://192.168.4.1”, gains access to the product’s Wi-Fi connection settings.
To enter the setup mode, press and hold the “ENTER” button (Fig. 1, pos. 1) on the front panel of the product for 5-6 seconds. The “ENTER” button will start flashing blue-red and EM-125 will create an access point named “EM-125_xxxxxxxx”, where xxxxxxxx is the unique product code (see Fig. 2).
Using an electronic device (PC with Wi-Fi, phone, tablet, laptop, etc.), connect to the access point using the following parameters:
Access point name: “EM-125_xxxxxxxx”
Security: None
Launch a web browser (Google Chrome, Opera, Firefox, etc.) on the electronic device.
After successful authorization, the status page will be displayed, showing current information about the EM-125 state. All information is read-only.
At the top of the screen, the device name “overvis EM-125”, current power consumption by the load “0 W”, and the ”☰” button for opening the main menu are displayed.
In the middle of the screen, there is a manual control button and readings of measured mains parameters (load current and power, mains voltage and frequency).
At the bottom of the screen, there are counters of consumed electricity and the amount of money spent.
Configuration and control via the “my.overvis.com” server is only possible after configuring the Wi-Fi connection and completing authorization on the “my.overvis.com” server (see “Wi-Fi Connection Setup”).
On an electronic device (PC, laptop, mobile phone, tablet, etc.), enter the link “http://my.overvis.com/smartplug” in the web browser address bar (Google Chrome, Opera, Firefox, etc.) and navigate to it.
The device screen will display connection options for EM-125. Select the most appropriate option and follow the further instructions displayed on the screen.
After connecting to EM-125, configure the necessary parameters by following the on-screen instructions.
To disconnect from EM-125 — simply close the “my.overvis.com” page.
After connecting EM-125 to a mains socket, there is a 5-second delay, then, if the mains voltage is within acceptable limits, the product starts turning the load on/off according to the user-defined schedule.
After turning on the load, EM-125 constantly monitors the mains voltage, current, and power consumed by the load. If any of them exceeds the set thresholds, EM-125 performs emergency load disconnection.
Also, after plugging EM-125 into a mains socket, it connects to the user-designated Wi-Fi network (for time synchronization and access to the “my.overvis.com” server).
Every 5 minutes, EM-125 saves statistics (voltage, current, power values, etc.) to non-volatile memory for subsequent transmission to the “my.overvis.com” server.
After receiving a manual control command (from the front panel or the “my.overvis.com” server), the execution of the current scheduled event is blocked, the load is turned off (or on, depending on the command), and EM-125 switches to manual control mode.
After the next scheduled event occurs, manual control is disabled and EM-125 returns to normal operation mode.
Every 1-2 hours (depending on the “my.overvis.com” server load), accumulated statistics are sent to the “my.overvis.com” server.
During operation, EM-125 constantly measures the mains voltage.
In case of a sharp voltage increase above 300±10 V, load disconnection occurs with a minimum delay of 0.02 s (fixed time).
In case of a gradual voltage increase above the 255 V threshold (upper disconnect threshold), the load will be disconnected after 0.5 s (upper threshold disconnect delay).
After disconnecting the load, if the mains voltage drops below 250 V (“Upper disconnect threshold” minus “Hysteresis”), return to normal operation mode will occur after the AR time.
In case of voltage drop below the 190 V threshold (lower disconnect threshold), the load will be disconnected after 12.0 seconds (lower threshold disconnect delay).
After disconnecting the load, if the mains voltage rises above 195 V (“Lower disconnect threshold” plus “Hysteresis”), return to normal operation mode will occur after the AR time.
Product operation in emergency mode is described in the “Load Disconnection Due to Emergency” section.
In case of an emergency situation (voltage, current, power exceeding values, etc.), the load is disconnected, the AR time countdown begins, and the “ENTER” button starts glowing red.
After the emergency situation disappears, the “ENTER” button starts flashing red with a 0.5 s period, indicating that the AR time countdown is in progress, after which the load will be automatically turned on.
If the AR time countdown ended before the emergency situation disappeared, then the load will be turned on without delay after the emergency situation disappears.
If the number of automatic reconnection attempts has been exceeded (for current and power protection — “3”, for voltage protection — “no”), the product will block load activation and the “ENTER” button will glow red continuously.
To restore product operation, disconnect it from the mains socket, wait 5 seconds, and plug it back in.
A single press of the “ENTER” button lasting 2-4 seconds switches the product to manual load control mode, where each button press turns on (if it was off) or turns off (if it was on) the load.
Press and hold the “ENTER” button on the product front panel
Plug the product into the mains socket and continue holding the button for 3 seconds. The “ENTER” button will start flashing blue-red rapidly, release the “ENTER” button
After the factory reset is complete, the “ENTER” button will stop flashing, and the product will automatically restart.
Settings are reset to factory defaults and the product is ready for use.
Data Exchange Protocol Between EM-125 and “my.overvis.com” Server
Do not allow water to get on the internal elements of the product, socket, and plug.
To improve operational characteristics, it is recommended to use the product at a load current not exceeding 10 A.
During operation and maintenance, follow the requirements of: “Rules for Technical Operation of Consumer Electrical Installations”; “Safety Rules for Operation of Consumer Electrical Installations”; “Occupational Safety in Operation of Electrical Installations”.
The product in the manufacturer’s packaging can be transported and stored at temperatures from -45 to +60 °C and relative humidity not more than 80%. During transportation, the product should be protected from mechanical damage.
Product service life is 10 years. After the service life expires, contact the manufacturer.
Storage period — 3 years.
The warranty period for product operation is 3 years from the date of sale.
During the warranty period of operation (in case of product failure), the manufacturer performs free product repair.
Warranty service is provided at the place of purchase or by the product manufacturer. Post-warranty service of the product is performed by the manufacturer at current rates.
Before sending for repair, the product must be packed in factory or other packaging that prevents mechanical damage.
