REDZ LKM Series User manual

LKM Series MODBUS RTU to IEC62056-21LKM Series MODBUS RTU to IEC62056-21
Protocol Meter Gateway User ManualProtocol Meter Gateway User Manual
1. About LKM Series MODBUS RTU to IEC62056-21 Protocol Meter1. About LKM Series MODBUS RTU to IEC62056-21 Protocol Meter
GatewayGateway
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway are designed to be used with electricity meters that
communicate in IEC62056-21 standard. The meters that support IEC62056-21 standard has read out tables that has
several data such as import energy, export energy, phase voltages and currents. LKM Series Modbus RTU to
IEC62056-21 Protocol Gateway automatically reads those values and maps to Modbus registers. Field devices or
software systems can easily read data over Modbus RTU protocol so that energy meter reading can easily be
integrated to field automation or monitoring systems without need of IEC6056-21 protocol implementation.
LKM series can read meters with auto baud changes or fixed baud rates and supports up to 10 meters on RS485 bus.
LKM614 is especially designed for EMH LZQJ-XC meters and it is direct replacement for Variomod XC modules.
2. Hardware Features2. Hardware Features
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway has 2-way communication. One side connected directly
or via optical probe to read electricity meter with IEC62056-21 protocol, other side can be connected to a field
device such as PLC or RTU or serial device server connected to an automation software system that can read
Modbus RTU devices.
There are standalone versions and also plug and play version for EMH LZQJ-XC meters.
2.1 Features – Standalone Version2.1 Features – Standalone Version
Auto reads Electricity meters that communicates in IEC62056-21 standard and maps in predefined MODBUS
register table
Supports Up to 10 meters reading on RS485 Bus
User defined initialization string can be sent before IEC62056-21 Mode C reading
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: 3,3V – 28V DC
Wide operating temperature range from -40 to 85 °C
Very Small form factor, only 2.1 x 4.2 x 4.4cm
ABS, IP40 housing
Customization of reading process and register tables based on client request
Firmware upgradable over serial line
2.2 Features – Plug and Play Version2.2 Features – Plug and Play Version
Especially plug and play designed for EMH LXQJ-XC meters
Direct replacement for Variomod XC modules for EMH meters
Auto reads EMH meters and maps values 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
Gets power directly from meter
Serial interface directly connected to meter ( with 15kV ESD protection)
Wide operating temperature range from -40 to 85 °C
Customization of reading process and register tables based on client request
Firmware upgradable over serial line
3. Installation3. Installation
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway has very small form factor.
Standalone versions are only 2.1 x 4.2 x 4.4cm. Thus, it can be acted as part of cable and no need special mounting.
Simply connect cables and use as a part of cable.
Plug and Play version can directly fit into EMH LZQJ-XC meter. It is direct replacement for Variomod XC modules.
Simply plug in LKM614 into meter.

4. Panel Descriptions and Pin Mappings4. Panel Descriptions and Pin Mappings
4.1 Modem Side: LKM1414.1 Modem Side: LKM141
1. DB9 Male connector for RS232: Only Tx-Rx-GND for data transmission.
Pin NumberPin Number DescriptionDescription
1 Not Used
2 Rx
3 Tx
4 Not Used
5 GND
6 Not Used
7 Not Used
8 Not Used
9 Not Used
4.2 Modem Side: LKM1444.2 Modem Side: LKM144
1. Terminal Connector for 2 wire RS485 connection and GND.
Pin NumberPin Number DescriptionDescription

1 GND
2 A
3 B
4.3 Modem Side: LKM6144.3 Modem Side: LKM614
1. Operation Mode Selection Switch
PinPin
Positions (1-Positions (1-
2)2)
LEDLED
StatusStatus
Modem SideModem Side
CommunicationCommunication
Data TypeData Type
Meter SideMeter Side
CommunicationCommunication
OFF-OFF Mode 1
LED ON 19200 8N1
Starts with
300 baud rate
and changes
during
transmission to
target baud
rate based on
IEC62056-21
protocol
ON-OFF Mode 2
LED ON 9600 8N1
Starts with
300 baud rate
and changes
during
transmission to
target baud
rate based on
IEC62056-21
protocol
OFF-ON Mode 3
LED ON 19200 8N1 19200 7E1 Fixed
ON-ON Mode 4
LED ON 9600 8N1 9600 7E1 Fixed
NOTE:NOTE: After changing operating mode of device, device must be repowered
to apply new setting. Which means device must be plugged out of the
device and plugged in back again.
2. Terminal Connector for 2 wire RS485 connection and GND.

Pin NumberPin Number DescriptionDescription
1 A
2 B
3 GND
4.4 Meter Side: LKM141 & LKM1444.4 Meter Side: LKM141 & LKM144
1. Terminal Connector for 2 wire RS485 connection and GND. Terminal also has external power input pins.
Pin NumberPin Number DescriptionDescription
1
Input Power +
(3,3V - 28V DC)
2
Input Power -
GND
3 GND
4 A
5 B
NOTE:NOTE: Power Input has polarity protection. Yet again please check polarity
when connecting multiple devices in same power source, otherwise device
may burn due to worng connection of power.
4.5 Other Side: LKM1414.5 Other Side: LKM141

1. Operation Mode Selection Switch
Pin Positions (1-Pin Positions (1-
2)2) LED StatusLED Status
Modem SideModem Side
CommunicationCommunication
Data TypeData Type
Meter SideMeter Side
CommunicationCommunication
OFF-OFF Mode 1 LED ON 19200 8N1
Starts with 300
baud rate and
changes during
transmission to
target baud rate
based on
IEC62056-21
protocol
OFF-ON Mode 2 LED ON 9600 8N1
Starts with 300
baud rate and
changes during
transmission to
target baud rate
based on
IEC62056-21
protocol
ON-OFF Mode 3 LED ON 19200 8N1 19200 7E1 Fixed
ON-ON Mode 4 LED ON 9600 8N1 9600 7E1 Fixed
NOTE:NOTE: After changing operating mode of device, device must be repowered
to apply new setting.
2. Power ON/OFF Switch
Switch PositionSwitch Position DescriptionDescription
1 Power Off Device
2 Power On Device
4.6 Other Side: LKM1444.6 Other Side: LKM144

1. Operation Mode Selection Switch
Pin Positions (1-2)Pin Positions (1-2) LED StatusLED Status Modem SideModem Side
Communication Data TypeCommunication Data Type Meter Side CommunicationMeter Side Communication
OFF-OFF Mode 1 LED ON 19200 8N1
Starts with 300 baud rate
and changes during
transmission to target baud
rate based on IEC62056-21
protocol
ON-OFF Mode 2 LED ON 9600 8N1
Starts with 300 baud rate
and changes during
transmission to target baud
rate based on IEC62056-21
protocol
OFF-ON Mode 3 LED ON 19200 8N1 19200 7E1 Fixed
ON-ON Mode 4 LED ON 9600 8N1 9600 7E1 Fixed
NOTE:NOTE: After changing operating mode of device, device must be repowered
to apply new setting.

4.7 Top Side: LKM141 & LKM1444.7 Top Side: LKM141 & LKM144
LED NumberLED Number DescriptionDescription
1 Mode 1 LED
2 Mode 2 LED
3 Mode 3 LED
4 Mode 4 LED
5 System LED: Blinks every second
6Tx LED: Sending data from Modem Side
to Meter Side
7Rx LED: Receiving data from Meter Side
to Modem Side
4.8 Top Side: LKM6144.8 Top Side: LKM614
LED Number Description
1 Mode 4 LED

2 Mode 3 LED
3 Mode 2 LED
4 Mode 1 LED
5 System LED: Blinks every second
6Rx LED: Receiving data from
Meter
7 Tx LED: Sending data to Meter
5. Usage Scenarios and Connection Diagrams5. Usage Scenarios and Connection Diagrams
LKM Series Modbus RTU to IEC62056-21 Protocol Gateways can be used in different scenarios. Usages are not
limited to that examples and user may create their own usage scenario.
LKM Series Modbus RTU to IEC62056-21 Protocol Gateways standalone versions support up to 10 meters reading on
RS485 Bus.
5.1 LKM Connected to Meter via Direct Cable and to Remote Server over TCP/IP5.1 LKM Connected to Meter via Direct Cable and to Remote Server over TCP/IP
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway can be connected to RS485 serial line of meter and can
operate in fixed baud rate mode. Other side of device can be connected to remote Data Acquisition Server via
TCP/IP device that can convert Modbus TCP to Modbus RTU.
5.2 LKM Connected to Meter via Optical Probe and to Remote Server over TCP/IP5.2 LKM Connected to Meter via Optical Probe and to Remote Server over TCP/IP
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway can be connected to optical probe of meter via REDZ
KMK series optical probes and can operate in changing baud rate mode. Other side of device can be connected to
remote Data Acquisition Server via TCP/IP device that can convert Modbus TCP to Modbus RTU.

5.3 LKM Connected to Meter via Direct Cable and to Remote Server over Direct Cable5.3 LKM Connected to Meter via Direct Cable and to Remote Server over Direct Cable
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway can be connected to RS485 serial line of meter and can
operate in fixed baud rate mode. Other side of device can be connected to Data Acquisition Server via Cable
connection as well and server can read data with Modbus RTU protocol.
5.4 LKM Connected to Meter via Direct Cable and to Remote Server over Field Device5.4 LKM Connected to Meter via Direct Cable and to Remote Server over Field Device
LKM Series Modbus RTU to IEC62056-21 Protocol Gateway can be connected to RS485 serial line of meter and can
operate in fixed baud rate mode. Other side of device can be connected to a field device such as PLC or RTU and
that device can read data with Modbus RTU protocol.