- Auto reads Electricity meters that communicates in IEC62056-21 standard and maps in predefined MODBUS register table
- Configurable Modbus address via Modbus Commands
- Configurable Reading Period on IEC6056-21 side via Modbus Commands
- Configurable Reading Table Number on IEC6056-21 side via Modbus Commands
- Wide range power input: 5V – 24V DC
- Wide operating temperature range from -40 to 85 °C
- Very Small form factor, only 2.1 x 4.2 x 4.4cm
- Customization of reading process and register tables based on client request
- Firmware upgradable over serial line
MODBUS RTU AND IEC62056-21 CHARACTERISTICS
Modbus RTU Address
Default value is 0x01
Changeable via Modbus Command
Reading Period on IEC62056-21 Protocol Meter Side
Default value is 10 (in seconds)
Changeable via Modbus Command
IEC62056-21 Protocol Meter Read Out Table
Default value is 0x30 = ‘0’in ASCII
Changeable via Modbus Command
IEC62056-21 Protocol Meter Reading Method
Read each line of table and register data during reading
IEC62056-21 Protocol Meter Read Out Data
Date
Time
Import and Export Active Energy
Import and Export Reactive Energy
Reactive Energy in 4 Quadrants
Import and Export Maximum Demands
Active Power
Phase Currents for each phase
Phase Voltages for each phase
Frequency
Error Code
Extendable/Changeable via firmware change
Monitoring Parameters
IEC Read counter
Time counter (in seconds)
FW version
Query able via Modbus Commands
INTERFACE AND INDICATORS
RS485 Connector Terminal Connector for 2 wire RS485 connection and GND on Modem Side
RS232 Connector Terminal Connector for 3 wire RS232 connection Tx-Rx-GNG on Meter SideOperation Mode Selection SwitchSelects the operating mode of the device.
Mode Selection
| Modem Side Communication Parameters
| Meter Side Communication Parameters
|
| Mode 1 (LED 1 ON) | 19200 8N1
| Starts with 300 baud rate and changes during transmission to target baud rate based on IEC62056-21 protocol
|
Mode 2 (LED 2 ON)
| 9600 8N1
| Starts with 300 baud rate and changes during transmission to target baud rate based on IEC62056-21 protocol
|
Mode 3 (LED 3 ON)
| 19200 8N1
| 19200 7E1 Fixed
|
Mode 4 (LED 4 ON)
| 9600 8N1
| 9600 7E1 Fixed
|
LED IndicatorsFollowing LEDs available to show system status.
1 – Mode 1 LED
2 – Mode 2 LED
3 – Mode 3 LED
4 – Mode 4 LED
5 – System LED: Blinks every second
6 – Tx LED: Sending data from Modem Side to Meter Side
7 – Rx LED: Receiving data from Meter Side to Modem Side
FIRMWARE UPGRADE
Upgrade over Serial Line
Available from Modem side Serial Line
RS485 on LKM114
Device must be on operating mode 19200 8N1 for firmware upgrade process.
POWER
Power Input
5V – 24V DC
Reverse Polarity Protection
Available
Thermal Shutdown Protection
Available
PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS
Enclosure
ABS, IP40
Dimensions
21 x 42 x 44 (h x w x d) mm
Weight
~60gr
Storage Temperature
-55 to 125 °C
Operating Temperature
-40 to 85 °C
Operating Humidity
5% to 95%Non-condensing
LKM114: Modem side RS485, Meter side RS232, Modbus RTU to IEC 62056-21 Protocol Meter gateway
