Novatek ET- 485 User manual

NOVATEK-ELECTRO LTD.
Intelligent Industrial Electronics
Protocol converter
Modbus RTU/ASCII (RS-485) to
Modbus TCP (Ethernet)
ЕТ- 485
USER MANUAL
TECHNICAL DATA SHEET
www.novatek-electro.in

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ET-485 NOVATEK-ELECTRO
CAUTIONS
Carefully study the user manual before using the appliance.
Place the unit under operating conditions and wait at least 2 hours before connecting it to the electricity
mains.
Do not use abrasives or organic compounds (alcohol, gasoline, solvents, etc.) for cleaning.
DO NOT OPEN AND REPAIR THE EQUIPMENT YOURSELF.
It may contain energized parts.
DO NOT OPERATE THIS UNIT IN CASE OF ANY MECHANICAL DAMAGE TO THE CASING.
DO NOT EXPOSE THIS PRODUCT TO WATER OR OPERATE IN A HIGH HUMIDITY ENVIRONMENT.
This is a safe in service unit if complying with operating procedures.

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NOVATEK-ELECTRO ET-485
CONTENT
1. Purpose
5
2. Specifications
6
2.1. Main specifications
6
2.2. Operating conditions
7
3. Structure and Functioning
8
3.1. Structure
8
3.1.1. Design
8
3.1.2. Display and control
9
3.2. Functioning
9
4. Maintenance and safety measures
11
4.1. Safety measures
11
4.2. Maintenance procedure for ЕТ-485
11
5. Connecting the ЕТ-485
12
6. Operating the ЕТ-485
13
6.1. General information
13
6.2. Operating ЕТ-485 over the HTTP protocol
13
6.3. Operating ЕТ-485 over the Modbus TCP protocol
13
7. Settings
14
7.1. General information
14
7.2. Parameters of ЕТ-485
15
7.3. Configuring ЕТ-485 through WEB interface
27
7.4. Configuring ЕТ-485 through Modbus interface
28
8. Complete set
28
9. Service life and warranty
29
10. Transportation and storage
30
11. Acceptance certificate
30
12. Data on claims
31
Appendix A. Switching to Ethernet
32
Appendix B. Character codes under ASCII standard
38

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ET-485 NOVATEK-ELECTRO
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-485 Protocol converter;
Server –is a unit, which performs specific functions at the request of other units;
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);
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;
Modbus –is a standard and protocol for packet communication over the "client-server " technology for industrial electronic units;
Modbus RTU –is a communication protocol of the unit for bite wise transfer of the package;
Modbus ASCII –is a communication protocol of the unit for the transfer of package in the form of ASCII-symbols;
Modbus TCP –is a protocol for transferring Modbus packages under the TCP/IP standard;
RS-485/EIA-485 –is a network standard for communicating units over the twisted pair;
TCP/IP –is a standard and a set of protocols for transferring data along the networks with delivery verification;
WEB –is a system for accessing documents on the server, used in the Internet.
WEB-page –is a document, file, recourse, which is available on the Web-server;
WEB-browser –is a WEB-server client for accessing the WEB-pages, which is primarily using the HTTP protocol.

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NOVATEK-ELECTRO ET-485
1 PURPOSE
ЕТ-485 is a microprocessor unit.
It is designed to exchange data over the Ethernet
10BASE-T and 100BASE-T network using the equipment,
which is provided with the RS-485 interface and establishing
a Modbus network. The standard network mapping using the
ЕТ-485 is provided in Fig.1.
The unit fulfills the functions of a Modbus-server for
switching the Modbus-clients to the Ethernet network. It
redirects the Modbus-requests from the clients to the units in
the Modbus network and returns their answers to the clients.
ЕТ-485 has:
flexible addressing within the Ethernet network
(overloading MAC-address, static and dynamic IP-address);
access protection over the Ethernet network
(password for configuration mode, IP-address filter for setting
and switching to the Modbus network);
different data transfer modes for Modbus network
(RTU and ASCII with/without odd-even check, wide range of
transmission speeds, selectable delay).
Web based interface for easy configuration and
monitoring.
Maximum current consumption 10mA (220VAC) Figure 1 –Network mapping with the unit

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ET-485 NOVATEK-ELECTRO
2. SPECIFICATIONS
2.1 Main specifications
Main specifications are resulted in Table 1.
Table 1 –Main specifications of the unit
Operating supply voltage, VAC
220-240
Voltage to maintain normal operation, V
- alternating current
- direct current
100 –250
140 –350
Supply frequency, Hz
47 –63
Data Exchange Interface over the Ethernet network
10BASE-T/100BASE-T (twisted pair)
Supported Ethernet protocols
Modbus TCP, HTTP
Maximum number of connections over the Modbus TCP protocol
11
Integrated servers
Modbus-server,
HTTP-server
Data Exchange Interface over the Modbus network
RS-485
Supported Modbus protocols
Modbus RTU,
Modbus ASCII
Maximum number of connected units within the Modbus network
32
LED
_
Readiness time upon switching the unit to the mains, sec, no more than
1
Utilized current (in case of 220 V), mA, at most
10
Weight, kg, at most
0.200
Dimensions, mm
95 х 52 х 67
Unit purpose
Communication equipment
Nominal operation condition
continuous

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NOVATEK-ELECTRO ET-485
Terminal bus specifications
- cross-section of switched conductors, mm2
- maximum effort (torque) on screw terminals, Nm
0.3 –3
0.4
Level of protection:
- unit
- terminal bus
ІР30
IP20
Protection class against electrical shock
II
Climatic version
УХЛ3.1
Permissible pollution density
II
Overvoltage category
II
Rated insulation voltage, V
450
Rated impulse withstand voltage, kV
2.5
Operating position
arbitrary
Pollutants in the amount,
which is not to exceed the maximum permissible concentration
none
2.2 Operating conditions
This unit is designed to operate (or to be stored) under conditions resulted in Table 2.
Table 2 –Operating and storage conditions
Operating temperature, °С
from minus 35 to +55
Storage temperature, °С
from minus 45 to +70
Atmospheric pressure, kPa
from 84 to 106.7
Relative air humidity (at 25°С), %
from 30 to 80

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ET-485 NOVATEK-ELECTRO
3. STRUCTURE AND FUNCTIONING
3.1. Structure
3.1.1. Design
The unit has a standard plastic case,
which can be attached to the DIN-rails with the
width of 35 mm. The unit drawing, together with
the overall and setting dimensions, is provided
in Figure 2.
Figure 2 –Overall dimensions of the unit

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NOVATEK-ELECTRO ET-485
3.1.2. Display and control
The front panel of ЕТ-485 is provided in Figure 3.
1 –Reset button "R" is designed to restart the unit or factory reset.
2 –Power indicator «Power» is activated if supply voltage is available.
3 –Error indicator «Error» warns about errors (to include format errors of incoming
data packages).
4 –Indicator «RS-485» is activated while waiting a reply from the unit in the
Modbus network; is flashing while data exchange over the Modbus network.
5 –Indicator «Ethernet» is activated when connected to the Ethernet network; is
flashing while data exchange over the Ethernet network.
Figure 3 –Front panel of ET-485
3.2. Functioning
Simplified structural diagram of the unit is provided in Figure 4.
32-digit RISC-processor with ARM architecture provides data routing between the Modbus RTU/ASCII (RS-485)
network and Ethernet (10base-T/100base-T) network. The operating speed and availability of channels for direct access to the
memory allows to process the high-speed data flow. Indicators provide information on the connection status and data transfer
over the Modbus and Ethernet networks. The "Reset" button allows of restart the unit, without switching it off the mains, or do a
factory reset:
to do a factory reset –press and hold down the reset button "R" for 8 seconds; "Error" indicator shall be activated in 2
seconds; the unit shall be restarted and the indicator "RS-485" shall be activated and deactivated after 8 seconds of
holding down the button; release the "R" button;
to reset the unit while saving user configurations –press and hold down the reset button "R"; release the "R" button
when "Error" indicator shall become activated.
Note –when restarting the unit, the clients may need to renew the connections.

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ET-485 NOVATEK-ELECTRO
The unit has a memory to save settings. Every unit is provided with a globally unique MAC-address (during the
production) and can be connected to local networks with a protected access to Internet.
Figure 4 –Structural diagram of the unit
DC power
Processor ARM cortex
m3
Control panel
LED module
(unit status
indication)
Reset button