WM Systems - Innovation in Smart IoT Systems WM-E2SL : WM Systems LLC – Innovation in Smart IoT systems

Electricity meter
Smart metering
Wireless access
RS232 connection
FW updates
Remote access
Product code:

Power consumption metering by our snap-in wireless modem through CDMA 450 / 2G / 3G / 4G / LTE-M / Narrow Band wireless networks.

Our scalable modem family has RS232 compatible connection (through RJ45 interface).

The modem is part of the AMI (Advanced Metering Infrastructure) of public utility company.

It is suitable for remote meter readout of electricity meters, meter data download and configuration on the provider’s request by schedules or on-demand.

Compatible with the Landis+Gyr® E350, E450, E550 (type ZxG 3xx and ZxG 4xx)  electricity meters.



• It supports CDMA 450, 2G, 3G, LTE 4G, LTE-M Cat.M and Narrow-Band Cat.NB networks
• The modem can be fitted into the meter enclosure and it can there be securely fastened
• Compatible with the Landis+Gyr® E350, E450, E550 (type ZxG 3xx and ZxG 4xx)  electricity meters
• Design and connectivity satisfy brand vendor meter manufacturer standards
• Separated and sealed isolation from meter
• Power supply from the metrology (10V DC power)
• „Pull” data sending (HES request)
• IEC 62056-21 protocol
• High availability
• It can also be operated from a private network with NAT, modem connects to the HES (Head End System)
• Remote & safe firmware updates
• Downloadable configuration tool: UniTerm®
• It constitutes a cost-effective solution, when implementing an automated energy metering system
• Supercapacitor option



  • Utility companies
  • Meter data transmission to the HES centre
  • Connecting meters to the Smart Grid


The modem unit fits into the meter enclosure.



The modems supports CDMA 450, 2G, 3G, 4G, LTE-M, NB (narrow-band) mobile network standards, static IP addresses. Transparent data transmission, supporting TCP/IP.



RS232 data connection (through RJ45).


Software features

  • Auto network recovery
  • Remote data download (such as metering values, parameters, load profile, log)
  • Remote configuration and firmware updates
  • Realtime clock



  • RJ45 connection cable
  • Optional FME antenna (50 Ohm) – upon request
  • UniTerm® configuration software


Technical data


Pay attention to the following products


UniTerm configuration tool

UniTerm configuration tool for the Itron and Landis+Gyr compatible metering modems (WM-E2S and WM-E2SL)



2G / 3G / 4G LTE Cat.1 / Cat.M / Cat.NB modems for the Itron ACE6000, ACE8000 and ACE SL7000 electricity meters



CDMA 450 / 2G / 3G / 4G / LTE-M / Narrow Band modems for Honeywell / Elster Alpha A1500, A1700, A1800 and the A1140/A1160 electricity meters



CDMA 450 / 2G / 3G / 4G / LTE-M / Narrow Band modems for Honeywell / Elster AS220/AS230/AS300 and AS1440, AS3000/AS3500 electricity meters


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