Device function description:


obr4This device was designed to comfortable data collection from electricity meters and to transfer the data to the supervisory control system. It is possible to process the data on a PC equipped with special software. For data collection most customers used impulse count system, where every impulse has its weight, for example 10kWh per every impulse.   
Disadvantage of this system is its inaccuracy caused by:
Impulse lose caused by wire line interruption
Impulse lose caused by power cut/restart/shutdown of the control system or PC.
Within every intervention to the electricity meters or currency transformers it is necessary to respect change of constant and weight of the impulses.

This can be simply solved by using direct OBIS registry reading from the electricity meters, when data in control system is exactly the same as data that are shown on display of the device, so no disproportion is occurring.

Gateway operate independently and provide followings services:


  • - periodically reads 1 to 16 registers from up to 32 electricity meters on single RS485 line
  • - registry can be different for every electricity meter
  • - different types of electricity meters with different communication speed are supported at the same time
  • - OBIS registers values are remapped to MODBUS slave registers (32bit)
  • - If values are in REAL form, they are automatically converted to UINT.
  • - (For example, 50.15 Hz is converted to 5015)
  • - registry contains information about time of reading
  • - Electricity meter, its communication status and time needed for the reading is also included in the registry
  • - If approved, periodical synchronization of internal clock in the electrometer is performed with built-in real time clock
  • - If GPS receiver is provided, internal clock is synchronized by GPS device (using GMT)
  • - Configuration / upgrade firmware is performed by software interface included.


 Typical system configuration




Basic parameters


  • - real-time clock
  • - RS232 communication, Wi-Fi, Ethernet  (optional)
  • - Built-in HTTP, FTP server (optional)
  • - configuration using TELNET  via USB or Ethernet
  • - USB port for settings and firmware upgrade
  • - 8 digital inputs potentially separated , meets  S0 27V 27mA specifications (possibility of direct connection with electricity meters - optional)
  • - 8 digital inputs potentially separated 30V 150mA (optional)
  • - 2 serial RS232 ports (optional)
  • - 2 serial RS422/485 ports (optional)
  • - Power supply 6-30V DC
  • - Consumption approx. 3W
  • - Dimensions 120 x 80 x 55 mm (4,7´x 3,14´ x 2,17´)
  • - Operating temperature -20 °C to +60 °C


 Protocols supported


data logger Protocol (special
Modbus RTU slave (supervisory DCS, RS232/RS485)
Modbus TCP slave (supervisory DCS, Ethernet)  
INMAT slave protocol
IEC 62056-21 (electricity meter, RS232/RS485)


Accessories – control terminal  


As a standard accessory we provide control terminal, which allows to set basic system parameters and last but not least to watch communication with the electricity meters in real time.




Terminal provides setting these parameters:
date and time , enable/disable of time synchronization
for Modbus interface: address and speed
for IEC interface: address, speed, password, par1, par2…


Configuration is saved in XML form and you can load it from the file, change it and save those changes. It is possible to load whole configuration into the device. You can also change parameters to be loaded into the electricity meters even when it is running.

Leaflet in section Download