REDZ Smart Communication Technologies

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-    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 both on Modem and Meter Side
Operation Mode Selection Switch
Selects the operating mode of the device.
( can be different depending on customer specific firmware)

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 Indicators
Following 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 LKM144

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

LKM144: Modem side RS485, Meter side RS485, Modbus RTU to IEC 62056-21 Protocol Meter gateway

ZTerminal Software for LKM Series

CE, ROHS, REACH Certificates

abcZ - Firmware Change Software

↗ User Manual ☶ Datasheet