WM Systems - Innovation in Smart IoT Systems WM-E1S : WM Systems LLC – Innovation in Smart IoT systems

Electricity meter
Smart metering
Wireless access
RS232 / RS485
FW updates
Remote access
Product code:

Wireless communication modem that has been specifically designed for use with the Honeywell® / Elster® Alpha electricity meters.

The smart modem has RS232 and RS485 (2 or 4-wire) connection capabilities, and it provides transparent data link to the HES centre,  through CDMA450 / 2G / 3G / 4G / LTE-M and
Narrow Band wireless network.

Our modem is part of the AMI (Advanced Metering Infrastructure) of the 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.
Owing to the interfaces, it can also be used as a universal external modem – as it is connectable to any meter type.


Main features

  • It supports CDMA 450, 2G, 3G, 4G, LTE Cat.M and Narrow-Band Cat.NB networks
  • It can be installed into the meter enclosure and fastened securely
  • Design & connectivity satisfy meter manufacturer standards
  • Sealed and separated from the meter
  • Power supply from the metrology (AC power)
  • Optional surge protection from 4kV up to 12kV
  • „Push” data sending (FTP or IEC push, SMS trigger)
  • IEC 62056-21 protocol
  • Scheduled data sending or triggered by an alarm
  • Remote switch of the meter operation mode
  • It can also be operated from a private network with NAT, the modem connects to the HES (Head End System)
  • Remote & safe firmware updates
  • Free WM-E Term® configuration tool / DMSet® option



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

Design and outfit

  • The modem can be installed inside the meter enclosure.
  • RS232/RS485 interface connection, AC power by metrology.



  • Honeywell® / Elster®  Alpha A1500, A1700, A1800 and A1140, A1160 electricity meters
  • Connectable to any meter as (universal) external modem



  • „Push” data sending (FTP or IEC push, SMS trigger)
  • IEC 62056-21 protocol
  • Scheduled data sending or triggered by an alarm
  • Immediate alarm notification



  • RS232/RS485 connection cable
  • Optional DIN-rail mounting clips
  • Optional SMA antenna (50 Ohm) – upon request
  • Downloadable WM-E Term® configuration software


Technical data


Pay attention to the following products


WM-E Term configuration tool

WM-E Term configuration tool for the Elster, Honeywell, Itrón compatible metering modems


Narrow Band Modem for Elster / Honeywell Alpha meters

External, industrial Narrow-Band modem with serial port for the Honeywell / Elster A1500, A1700, A1800, A1140, A1160 Alpha electricity meters


Narrow Band Modem for Honeywell / Elster AS meters

Industrial Narrow-Band modem for the Honeywell / Elster AS220, AS230, AS300, AS1440, AS3000, AS3500 electricity meters


Load Control Box

Scalable & smart street lighting with remote control, central switching, monitoring and wireless networking access


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