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1 DESCRIPTION AND FUNCTIONING
1.1 PURPOSE
Protocol converter RS-485 via mobile communication EM-486 provides access to readings of gauges
and registers of Modbus connected via RS-485 interface with the help of text SMS messages, data automatic
gathering from the selected devices, transmitting the gathered data via GPRS or Ethernet to the net data
base, automatic transmitting SMS alarms of state of selected devices.
EM-486 has:
Flexible options of connection (via wire or wireless communication, automatic method selection of
communicating with a server, automatic or manual selection of GSM provider and communication
parameters, resetting of MAC-address and other Ethernet settings);
Protection of access (password for setting mode, filter of IP-address for setting or connection to
Modbus network, connection only to the selected server with automatic log-in, password for control via SMS);
Different modes of data interchange via Modbus network (RTU or ASCII, with checking of parity for
even-odds or without checking, wide range of transmitting rate, adjustable delay);
Programmable outputs for reaction at events and alarms;
Programmable inputs for sensors;
Power output for sensors;
Reserve power supply input;
Service functions (saving the collected data to flash memory card including the restoring of
transmitting in case of communication break down, data single sourcing on the selected external server,
software updating option).
EM-486 meets the requirements of ІEC 60950-1:2001 Data processing devices. Safety measures. Part 1.
General requirements.
Low voltage complect switchgears. Part 1. General rules (IEC 60947-1:2004, ІDТ).
Electromagnetic
Characteristics of electromagnetic interference. Limits and methods of measurement (CISPR 11:2004, IDT).
Low-voltage switchgear and controlgear. Part 6-1. Multiple function equipment. Transfer
switching equipment (ІEC 60947-6-1:2005, ІDT);
Electromagnetic compatibility. Limits and methods of measurement of radio disturbance
characteristics of broadcast receivers and associated equipment (EN 55013:1997, ІDT)
Harmful substances in quantities exceeding the maximum permissible concentrations are not available.
1.2 TERMS AND ABBREVIATIONS
10Base-T – Ethernet standard for twisted pair communication with the speed of 10Mbit/s;
100Base-T – Ethernet standard for twisted pair communication with the speed of 100Mbit/s;
8P8C/RJ45 – is an unified socket for 10Base-T / 100Base-T network connections;
Twisted pair – is a pair of insulated conductors inside the cable, which are twisted together in order to
reduce the distortion of the transmitted signal;
Indicator – is a LED element;
Client – is a device, which is addressing the other devices (server) with a request to perform certain functions;
Package – is a block of data to be transmitted between devices;
Unit – is the ЕТ-486 Protocol converter;
Server – is a unit, which performs specific functions at the request of other units;
Signal – is a unit LED;
ASCII – is a table of standard codes for information interchange;
Ethernet – is a standard for packet network communication and transmitting data between units (e.g., PCs);
FTP – the FTP protocol of a file transfer according to the standard TCP/IP
GPRS – GPRS – technology of a packet transmission of data on mobile communication
GSM - the standard of digital mobile communication
HTTP – is a protocol for transferring Web-pages and other data over "client-server" technology;
Internet – is a global routing system of units for storing and transferring data;
IP (protocol) – is a routable protocol for transferring data over Ethernet. It is a part of TCP/IP and used for
Internet;
IP (address) – is a node address, which is unique within a single network, operating over the IP protocol;
IPv4 – is a four byte IP-address;
MAC (address) – is an address, used for device authentication during Ethernet transmissions. It is usually
unique although qualified personnel can change it under certain circumstances.
MAC-48 – is a six byte MAC-address;
NOVATEK-ELECTRO
compatibility.
Equipment
~ 3 ~
is
industrial,
scientific
and
medical
radio-frequency.
EM-486
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