GSM-GPRS modem Bitcord RS 485-232 for GSM/GPRS data transmission, RS-485 and RS-232 interfaces

BitCord RS-485/RS-232 GSM/GPRS data-transmission modem

📡 The BitCord RS-485/RS-232 is an industrial modem designed to transmit data remotely from meters, controllers, flow computers and other equipment through a GSM/GPRS mobile network.

It supports 2G communication in the GSM 900/1800 bands and provides two industrial serial interfaces: RS-485 and RS-232.

🔄 Operating principle

A connected meter or controller generates consumption and equipment-status data. The modem reads this information through RS-485 or RS-232 and transmits it through the mobile network to a metering or dispatch server.

• the meter measures resource consumption;
• the modem reads data through the serial interface;
• information is sent through GSM/GPRS;
• the server receives and stores the data;
• the operator views it in the metering application.

🔌 RS-485 and RS-232 interfaces

RS-485 is commonly used for industrial meters and controllers and is suitable for communication in electrically noisy installations.

RS-232 is intended for devices with a serial COM port, flow computers and configuration equipment.

Before connection, verify the communication protocol, baud rate, parity, stop bits and cable pinout.

📶 GSM/GPRS transmission

The modem operates on 2G mobile networks in the GSM 900/1800 bands. An active SIM card and available 2G coverage are required.

Depending on the exact hardware and firmware version, supported modes may include:

• GPRS;
• TCP/IP;
• CSD;
• SMS commands;
• transparent serial-data transmission.

🏭 Compatible equipment types

• gas meters and volume correctors;
• electricity meters;
• heat meters;
• water flow meters;
• gas flow computers;
• industrial controllers;
• sensors and data loggers;
• telemetry equipment;
• automated gas- and electricity-metering systems.

Important: a standard pulse-output meter cannot normally be connected directly unless a compatible pulse-to-RS-485 or pulse-to-RS-232 converter is installed.

📊 Remote-metering capabilities

• automatic collection of readings;
• fewer manual site visits;
• monitoring of remote facilities;
• consumption archiving;
• transmission of process parameters;
• diagnostic-message collection;
• dispatch-system integration;
• centralised monitoring of multiple sites.

🔋 Power supply

The Schetchik.uz product listing specifies a supplied mains power adapter. Verify its output voltage, current rating and connector polarity before use.

📡 SIM card and mobile service

• disable the SIM PIN request;
• verify 2G coverage at the site;
• enter the mobile operator’s APN;
• check the tariff and account balance;
• configure the server address and port;
• position the antenna where signal quality is stable.

The SIM card and cellular service are normally purchased separately.

✅ Key advantages

• RS-485 and RS-232 interfaces;
• GSM/GPRS data transmission;
• 2G GSM 900/1800 support;
• connectivity for different metering devices;
• automated-metering integration;
• remote reading collection;
• suitable for sites without wired internet;
• mains power adapter included;
• centralised monitoring capability.

🏢 Applications

• industrial facilities;
• boiler houses;
• gas-distribution stations;
• transformer substations;
• municipal facilities;
• gas, water, heat and electricity metering stations;
• warehouses and remote production sites;
• telemetry and dispatch systems;
• automated commercial-metering systems.

📦 Package contents

• BitCord RS-485/RS-232 GSM/GPRS modem;
• mains power adapter;
• packaging.

Confirm whether the antenna, RS-232 cable, RS-485 terminal, product passport and warranty card are included in the supplied batch.

⚠️ Confirm before ordering

• exact BitCord hardware model;
• compatibility with the connected meter;
• supported meter protocol;
• GPRS TCP/IP or CSD operating mode;
• SMS-command support;
• supported mobile frequency bands;
• number and format of SIM cards;
• antenna and interface-cable inclusion;
• power-adapter output voltage;
• operating-temperature range;
• enclosure protection rating;
• mounting method;
• compatible server software;
• warranty and exact package contents.

⚠️ Important: the presence of an RS-485 or RS-232 port does not guarantee compatibility with every meter. Both devices must use compatible serial-port settings and communication protocols.