Elgama Sistemos Ltd

- Model MDC 1.55U - SCADA Meter Data Communicator


MDC 1.51U task is to sustain connectivity with electricity distribution stations, collect, archive electricity meter data and transfer them into SCADA system via Ethernet LAN network by IEC60870-5-101 protocol. Memory storing and instantaneous data collection, data archiving and transfer into local or remote data collection center can be performed simultaneously. There can be 12 electricity meters connected to the controller via Current Loop interface.

Active 20 mA current loop interfaces:

  • Independent channels - 6;
  • number of an electricity meters connected to the one Current Loop interface - 2;
  • the global number of an electricity meters connected to the Current Loop interfaces - 12;
  • nominal Current Loop voltage - 10 V;
  • Current Loop interface surge protection - 37V (external module);
  • nominal current - 20 ± 2 mA
  • isolation level: DC 1,2/50 ms 5 kV impulses.
  • maximum length of the Current Loop interface - 2,5 km (resistance < 0.0072 Om/m);

Passive Current Loop interface:

  • data transfer speed - up to 19200 bod;
  • external current generator current - 20 mA ± 2 mA;
  • maximum input voltage DC +30 V;
  • isolation level: DC 1,2/50 ms 5 kV impulses (recommended external module PROTEC).

Independent serial communication interface RS232 for configuration of controller.

10Mb Ethernet (LAN TCP/IP) communication interface:

  • communication speed - 10 Mb/s. IEC60870-5-104 data transfer protocol integrated;
  • up to 3 simultaneous sessions.

The main properties of MDC 1.51U:

  • data pooling - up to 2 chosen parameters groups for any chosen meter or meter group (ex. instant data and meter time);
  • buffered data transfer speed via Ethernet - 12 meters/2 parameters per second;
  • data protection from erros while transferring them - 3 protection levels;
  • remote configuring of an electricity meter system;
  • remote synchronization of an internal clocks in an electricity meters system.

Software update:

  • remote update for the software which controls the controller;
  • remote update for the LAN modem controller software;
  • remote controller configuring.
  • special software MDCpar, produced by 'Elgama Sistemos', is needed


  • IP40 (custom order - IP65).
  • LST EN 61010-1:2002 (IEC 61010-1, Cat I).

Electromagnetic support:

  • LST EN 55022:2000

Power supply:

  • voltage - 110 V...250 V (AC/DC);
  • power consumption - < 5 W.


  • operating temperature: -20...50 °C;
  • storing temperature: -25...70 °C.


  • 195x165x97 mm3/

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