GPRS-module for EX18 and EX518

GPRS data-transmission module for EX18 and EX518 electricity meters

📡 The GPRS module for EX18 and EX518 is a communication device designed to transmit electronic electricity-meter readings automatically to a remote server or automated metering platform.

It is compatible with:

• EX18 — a single-phase electronic electricity meter;
• EX518 — a three-phase electronic electricity meter.

📲 Operating principle

The electricity meter measures energy consumption and stores its data internally. The GPRS module reads the information through the RS-485 interface and sends it through a GSM/GPRS mobile network to the metering server.

• the EX18 or EX518 measures electricity consumption;
• the module reads the data through RS-485;
• the information is transmitted through the mobile network;
• the server receives and stores the data;
• the user views readings in an AMR or dispatch application.

📶 GSM/GPRS transmission

The module uses a mobile network to transmit small data packets. This is convenient at sites without wired internet access.

Operation generally requires:

• an active SIM card;
• GSM/GPRS coverage;
• correct APN settings;
• server address and port;
• registration of the meter in the metering platform.

Confirm whether a SIM card is included. Cellular service is normally paid for separately.

🔌 RS-485 interface

The module communicates with the electricity meter through the industrial RS-485 serial interface.

Installation must observe:

• correct A and B polarity;
• the manufacturer’s wiring diagram;
• permissible cable length;
• screening and grounding requirements;
• communication speed;
• the meter’s network address.

🔐 DLMS protocol

EX18 and EX518 meters use specialised communication protocols. The manufacturer specifies DLMS TCP/IP for GPRS communication and a DLMS-family protocol for the RS-485 port.

📊 Data that may be transmitted

• accumulated active energy;
• reactive energy;
• tariff-zone readings;
• voltage;
• current;
• power;
• power factor;
• date and time;
• load profile;
• power-failure and restoration events;
• diagnostic information.

The exact available data depends on the meter version and metering software.

🏢 Automated electricity metering

The module can operate as part of an automated meter-reading or electricity-metering system.

• reduces manual meter-reading visits;
• reduces data-entry errors;
• accelerates reporting;
• enables remote consumption monitoring;
• compares consumption across periods;
• allows several sites to be monitored centrally;
• provides access to archived data.

🌡️ Operating conditions

The stated operating-temperature range is −10 to +45 °C. The module should normally be installed inside a protected electrical enclosure.

📡 Mobile-signal quality

A metal electrical cabinet may reduce mobile-network signal strength. Communication should be tested before final installation.

Where signal strength is low, it may be necessary to:

• change the module location;
• install an external antenna;
• place the antenna outside the metal cabinet;
• use a SIM card from another operator;
• verify APN settings.

✅ Key advantages

• compatible with EX18 and EX518;
• automatic transmission of meter readings;
• RS-485 interface;
• GSM/GPRS communication;
• DLMS protocol support;
• supports single- and three-phase meters;
• reduces manual meter-reading requirements;
• integration with automated metering systems;
• suitable for remote sites;
• communication cable included;
• one-year official warranty;
• Uzstandard certificate.

🏭 Applications

• private houses;
• apartments and residential complexes;
• shops and offices;
• industrial facilities;
• warehouses;
• business centres;
• municipal facilities;
• transformer substations;
• electrical distribution panels;
• automated electricity-metering sites.

📦 Package contents

• GPRS module for EX18 and EX518;

The SIM card, mobile tariff, server and software may not be included in the standard package.

🔧 Installation recommendations

• disconnect the electrical supply before installation;
• verify compatibility with the exact meter modification;
• connect RS-485 according to the wiring diagram;
• do not reverse the A and B terminals;
• configure the meter address and communication speed;
• install an active SIM card;
• enter the mobile operator’s APN settings;
• configure the server address and port;
• check GSM signal strength;
• perform a test transmission;
• compare remote data with the meter display;
• install the module inside a protected electrical enclosure.

⚠️ Confirm before ordering

• exact EX18 or EX518 modification;
• firmware compatibility;
• connector type and wiring diagram;
• module supply voltage;
• power-supply unit inclusion;
• supported GSM frequency bands;
• supported mobile operator;
• antenna type and inclusion;
• SIM-card format;
• whether the SIM card is included;
• compatible AMR server;
• software and licence requirements;
• DLMS communication settings;
• remote-configuration capability;
• enclosure protection rating;
• dimensions and mounting method;
• exact package contents.

⚠️ Important: the module will not begin transmitting data merely after the cable is connected. The SIM card, network parameters, electricity meter and server must be configured correctly.

⚡ Installation and configuration should be carried out by a qualified electrical specialist.