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MODBUS to IEC62056-21 Protocol Meter Gateway with 2 x 10/100Base-T(x) Ports, 1 x RS232 and 1 x RS485 Serial Ports
LKM254
MODBUS to IEC62056-21 Protocol Meter Gateway with 2 x 10/100Base-T(x) Ports, 1 x RS232 and 1 x RS485 Serial Ports
per one
275.50 USD 290 USD
If you buy less than 5 items you will lose your 5% discount
-    5-48V DC wide range Power Input (allows up to 60 V DC)
-    Supports 2 x 10/100Base-T(X) ports
-    Supports 1 x RS232 and 1 x RS485 Serial Connection up to 115200 Baud
-    Embedded web interface for ease of use
-    2 different Gateway Operating Modes:     
     Serial IEC Meter to Modbus TCP Gateway with MQTT Publisher
     TCP/IP IEC Meter to Modbus RTU Gateway with MQTT Publisher

-    Up to 20 IEC Meter reading and conversion of their data to Modbus TCP or RTU conversion 
-    Reading up to 48 OBIS Registers and all user configurable from web interface
-    MQTT Publisher with different data transfer options

     OBIS Values as Data Objects
     OBIS Values as Modbus Frame

-    Easy to follow Meter Reading and Modbus Communication status from web interface
-    Easy to follow OBIS to Modbus mapping status from web interface
-    Easy to follow Meter Read Out Data from web interface 
-    White List or Black List based IP filter up to 20 IP Addresses 
-    Firmware Upgrade over Web
-    2 firmware storage capability on same device (1 active only)
-    Wide operating temperature range from -40 to 85 °C 
-    Rugged Metal IP-40 housing design
-    DIN-Rail mounting
METER READING DETAILS
Up to 20 meters can be read and mapped to Modbus Registers
Serial Interface
Freely selectable serial interface for each meter in list
RS232
RS485
Baud Rate
Freely selectable start baud rate for each meter in list
300
600
1200
2400
4800
9600
19200
38400
57600
115200
Table Code
Freely selectable reading table code for each meter in list

Init String Count and String Itself

Freely definable init string for each meter in list
If meter needs an init string to "wake up", user can define the string itself and number of times that it will be sent

Query Interval

Freely selectable query interval for each meter in list
That depends on meter reading list, since each meter will be read 1 by 1 over RS485 bus (or directly from RS232), reading interval depends on number of meters in list and read out reading time for each meter (based on its read out list)
Time Out
Freely selectable time out value for each meter in list
LKM will continue with next meter in list in case there is no response from meter in predefined time out duration
OBIS Codes
Up to 48 OBIS codes can be defined and enabled to be read from all meters in list
User can open 2 web pages side by side and check readout list from meter and simply add OBIS codes to LKM as per need


MODBUS CHARACTERISTICS
Up to 20 meters can be read and mapped to Modbus Registers
Up to 48 OBIS values can be mapped into Modbus Registers
Gateway Modbus Address
Default value is 1
User can change from web interface
Modbus Data and Addresses
Data can be read via Function Code 3
Read Holding Registers (4x)
all registers are "long" data

Adress of 1st Meter Data:
Hex: 0x00 00
Decimal: 0
Quantity: 96 (only available if 48 registers are enabled, it changes based on enabled regsiters quantity)
Adress of 2nd Meter Data:
Hex: 0x01 00
Decimal: 256
Quantity: 96 (only available if 48 registers are enabled, it changes based on enabled regsiters quantity)

Adress of 3th Meter Data:
Hex: 0x02 00
Decimal: 512
Quantity: 96 (only available if 48 registers are enabled, it changes based on enabled regsiters quantity)

.....

Adress of 20th Meter Data:

Hex: 0x13 00
Decimal: 4864
Quantity: 96 (only available if 48 registers are enabled, it changes based on enabled regsiters quantity)


MQTT DETAILS
MQTT Publisher can be enabled and can be used in parallel with Modbus conversion (or stand alone)
MQTT Connection
Broker IP and Port can be entered
Client ID , User name and Password can be set
Publish Topic and Subscribe Topic can be defined from web interface
Data Send Interval
User can send Data send interval in seconds
Default is 60 seconds and LKM will send meter data to MQTT server in that interval

NTP Server

NTP server time will be added to each MQTT message
Data Format
There are 2 predefined formats
OBIS Values As Objects: Sends OBIS values and then mapped values in ASCII readable fromat
OBIS Values as Modbus Frame: Send just like the response of Modbus query as hex data (smaller data size)


WEB MONITORING DETAILS
Meter Communication Status
User can see reading status of each meter in reading list
Last Query Time and Last Serial Package also available in this list
Modbus Communication Status
User can see reading status of each Modbus client connected
Last Query Time and Last Received and Sent Packages also available in this list
Meter Reading to Modbus Mapping (Gateway) Status
User can see modbus mapping status of each meter in reading list
Data can be checked in realtime or status can be set for any specific meter in list
Ex: Show mapping status of Meter Number 2 in meter reading list only
Meter Reading Status
User can see IEC reading details in real time
This data can help to select desired OBIS codes


CONNECTORS AND PORTS
Console Port
Micro USB or USB Type-C connection for LOG in 115200 baud
10/100T(X) RJ45 Ports
Ethernet Connection on 2 ports
Serial Ports
5 pin wired Terminal Connection
Tx, Rx, GND for RS232
A and B for RS485
Reset Buttons
Reset to Client and Reset to Server Operating modes buttons


LED INDICATORS
Power indicator
Power LED
10/100T(X) Indicators
Activity LEDs:
ETH1, ETH2 and LKM (Activity of device itself)
System Indicators
Status LED,
Tx and Rx of data LEDs and Server LED
(LED ON: Server Operating Mode, LED OFF: Client Operating Mode)
Console Indicators
Tx and Rx of data LEDs


POWER
Input Range
100 - 240V AC (120 – 370V DC), 50Hz to 60Hz AC input
Isolation
Fully Isolated >4200Vrms, 5mA 1 Min
Insulation
Class II


PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS
Enclosure
Metal, IP 40
Dimensions
43 x 95 x 124 (w x d x h) mm
Weight 
~400gr
Storage Temperature
-40 to 85°C
Operating Temperature
-25 to 70 °C 
Operating Humidity
10% to 95%Non-condensing


LKM254: MODBUS to IEC62056-21 Protocol Meter Gateway, 2 x 10/100 T(x) ETH ports, 1 x RS232 & 1 x RS485, 100 - 240V AC (120 – 370V DC), 50Hz to 60Hz AC Power Input

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