LKM254 MODBUS TCP to IEC62056-21 Protocol Meter Gateway

- 2 x 10/100Base-T(X) ports
- 1 x RS232 and 1 x RS485 serial port
- Embedded web interface
- Reads electricity meters with IEC 62056-21 (Mode C), DLMS/COSEM, and DLMS/COSEM with IEC 62056-21 opening
- Meter side start baud rate selectable from 300 to 115200 baud for each meter
- 2 device functions:
  • Serial Electricity Meter to Modbus TCP Gateway (and MQTT Publisher): meters on the RS232 or RS485 port, data given out as Modbus TCP (and MQTT)
  • TCP/IP Electricity Meter to Modbus RTU Gateway (and MQTT Publisher): meters on the network (IP address and TCP port of each meter), data given out as Modbus RTU on the RS232 or RS485 port (and MQTT)
- Up to 32 meters (IEC 62056-21 and DLMS/COSEM), data converted to Modbus TCP or Modbus RTU
- Up to 48 OBIS codes per meter profile, 6 profiles (IEC 62056-21, Landis+Gyr DLMS, Actaris/Itron, Iskra DLMS, Cewe DLMS, Generic DLMS), all set from the web interface
- Several IEC meters on one RS485 line: a read-out that comes from another meter than the one asked is not stored
- Negative meter values keep their sign; a value too large for the 32-bit register gives a fixed limit value
- Modbus TCP server with up to 10 clients at the same time, or Modbus RTU output from 300 to 460800 baud
- Function code 03 (Read Holding Registers); every value is 32 bits = 2 registers, 48 values per meter row
- MQTT publisher with two data formats (OBIS VALUES AS OBJECTS and OBIS VALUES AS MODBUS FRAME), at the same time as Modbus
- Meter reading, Modbus communication and OBIS-to-Modbus mapping status, and the meter read-out data, on the web interface
- Device Status overview cards for the meters, Modbus and MQTT, each with a green, amber, red or grey dot
- White list or black list IP filter with up to 20 IP addresses (in the Modbus TCP function)
- DHCP server
- Firmware update over the web interface; 2 firmware banks in the device (1 active), the previous firmware can be started again
- Configuration backup and restore as a file
- 100 - 240 V AC, 50 Hz to 60 Hz (120 - 370 V DC) wide range power input
- Operating temperature -25 to 70 C
- Rugged metal IP-40 housing
- DIN-rail mounting