WM-E2SL Modem for Landis+Gyr Meters

Cellular modem for Landis+Gyr E350, E450, E550 (type ZxG 3xx and ZxG 4xx) electricity meters – for 2G, LTE Cat.1 / 2G / 3G, LTE Cat.M / Cat.NB, and LTE Cat.M 450MHz networks
Electricity meter
Smart Metering
Wireless access
FW Updates
Remote Access

Cellular modem designed specifically for the remote automatic meter reading of Landis+Gyr® E350, E450, E550 (type Zxx 3xx and Zxx 4xx) electricity meters. The device can be ordered with various cellular module types. In collaboration to provide state-of-the-art cellular modems for its customers in Europe, WM Systems was selected as one of the OEM suppliers of Landis+Gyr.

The product’s case was designed to fit under the enclosure of the meter and it connects through an RJ45 data connector. As part of an AMR/AMI solution, the modem provides a stable, transparent connection to the meter through which the HES can pull consumption data from the meter.

The modem can send data by CSData call (2G) also. This is an ideal solution for remote readout of registers and consumption data of the connected electricity meters.

The modem is fully configurable by our powerful and easy-to-use WM-E Term® software.


Main features

  • Wireless module order options:
    • 2G
    • 4G LTE Cat.4 / 3G / 2G
    • 4G LTE Cat.1 with 2G “fallback” or 2G / 3G “fallback”
    • LTE Cat.M / Cat.NB with 2G “fallback” or 450MHz option
  • It fits perfectly under the terminal cover of the meter and fastened securely (sealed and separated from meter)
  • Design & connectivity meets with meter standards
  • Compatibility with Landis & Gyr® Zxx 3xx, Zxx 4xx (E350, E450, E550) type of electricity meters
  • DC power supply from the meter
  • Transparent data connection
  • Configurable RS232 (RJ45)
  • Embedded, realtime operation system
  • „Pull” data sending (for HES request), CSData call
  • Immediate alarm- and SMS notification
  • Remote & safe firmware updates
  • Downloadable WM-E Term® configuration tool
  • Supercapacitor (against power outages)
  • Self-recovery: embedded watchdog, self recover from faults, ensuring normal operation of the device
  • Device Manager® software (order option)



  • Remote Automatic Readout of the Electricity Meter
  • Operational check
  • Maximum Demand Reset
  • Meter synchronization

Design and outfit

  • The modem is installable into the meter enclosure
  • Configurable RS232 interface connection (RJ45 connector)
  • DC power supply by meter
  • Supercapacitor, Last GASP notification
  • SMA or FME antenna connector outfit (by order request)



  • Landis & Gyr® ZxG3xx, ZxG4xx, ZxD3xx, ZxD4xx (E350, E450, E550 type) meters



  • IEC 62056-21 protocol, transparent data transmission
  • „Pull“ data sending (for HES request)
  • CSData call (2G)
  • Immediate notification, SMS messages



  • Optional SMA / FME antenna (50 Ohm) – upon request
  • RJ45 cable (for meter connection / modem configuration) – order option
  • USB/RS232 DONGLE Adapter (for modem configuration) – order option
  • WM-E Term® configuration software
  • Device Manager® software (order option)


Technical data

WM-E2SL v5 Modem – 2G module, LTE Cat.4 / 3G / 2G module, LTE Cat.1 modules with 2G or 2G/3G “fallback” feature, LTE Cat.M / Cat.NB / 450MHz module with optional 2G “fallback”


WM-E2SL v2 Modem – LTE Cat.1 modules with 2G or 2G/3G “fallback” feature, LTE Cat.M / Cat.NB modules with optional 2G “fallback” feature


Datasheet – WM-E2SL v5 Modem – 2G module, LTE Cat.1 modules with 2G or 2G/3G “fallback” feature, LTE Cat.M / Cat.NB / 450MHz module with optional 2G “fallback”

Datasheet – WM-E2SL v2 Modem – LTE Cat.1 modules with 2G or 2G/3G “fallback” feature, LTE Cat.M / Cat.NB modules with optional 2G “fallback” feature

Quick Guide

Installation Manual

WM-E Term User Manual

WM-E2S(L) Parameter Description

WM-E Term Appendix

WM-E Term configuration software

Configuration template for WM-E Term software (compressed ZIP file, extract the CFG file)

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The remote management and maintenance of an IIoT solution can be a real challenge. Improve the network availability and operational efficiency of your fleet!

WM-E1SL Modem for Landis Meters

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