WM-E3S Modem for Elster AS smart meter family

Cellular modem specifically designed for Honeywell AS220/AS230/AS300 and AS1440, AS3000/AS3500 electricity meters. Available for LTE Cat.1 / 2G / 3G, LTE Cat.4, Cat.M / Cat.NB networks.
Electricity meter
Smart Metering
Wireless access
RS232
FW Updates
Remote Access

 

Last Updated on 2025-10-29

UPGRADE THE MODEMS NOT THE SMART METERS!

All around the world mobile operators are shutting down 2G/3G networks in order to give way to 5G. Companies that operate smart meters with 2G/3G connectivity must plan the migration to the latest 4G LTE network which is well-positioned to dominate smart metering communication technologies in the upcoming years. The migration to LTE has many advantages, for example, a shorter readout time due to the high-speed network with low latency.

Utilities have two options for migration: replace the meters or upgrade the modems! The 1st option comes with a high CAPEX, while the 2nd option is a future-proof solution that reduces TCO.  

Our company develops cellular modems that work smoothly and are fully compatible with the different models of Honeywell electricity meters.

These devices were designed to fit under the terminal cover of the meter and are compliant with all Honeywell standards. Our cellular modems represent a future-proof migration solution to the LTE network with the same functionality, on higher data speed. Configuration and firmware updates can be done remotely, minimizing the need for costly site visits.

 

Quick Specifications — WM-E3S HONEYWELL
Device type Smart electricity metering cellular modem
Primary use case Smart metering (AMI/AMR), Smart Grid, LTE and Cat.M upgrade of legacy meters
Cellular & RF Access Technology LTE Cat.4 / LTE Cat.1 / Cat.M/NB / 450 MHz; 2G fallback
Protocols IEC Transparent, TCP, DLMS, M-Bus
Interfaces, Physical Connectors internal serial, Ethernet (optional), P1 Customer Interface (optional), M-Bus (optional), Relay output (optional)
Meter compatibility HONEYWELL AS220, AS230, AS300, AS1400, AS3000, AS3500 type electricity meters
Power & Environment AC power from the meter  between -40 Celsius and +70 Celsius degree, IP51 protection
Approvals & Certifications CE, RoHS, ReD DA
Firmware Customized Free RToS (embedded system)
Installation Fit under the terminal cover of the meter
Configuration WM-E Term configuration software (downloadable) via local or TCP
Device Management Device Manager software (Remote provisioning, firmware update, bulk config)
Security TLS, Super capacitor (LastGASP notification), Surge protection

 

The product’s case was designed to fit under the terminal cover of the meter. As part of an AMR/AMI solution, the modem provides a stable, transparent “push” or “pull” connection to the HES. The modem reads actual and stored consumption data, recorded event log, and load profile data by “push” or “pull” data transfer method.

The device is fully configurable by our WM-E Term® software.

 

Main features

  • Wireless module order options:
    • 4G LTE Cat.1 with 2G or 2G / 3G “fallback” feature
    • 4G LTE Cat.4 / 3G / 2G
    • LTE Cat.M / Cat.NB with optional 2G “fallback” feature
  • It can be assembled into the meter’s enclosure and fastened securely (sealed and separated from meter)
  • Design & connectivity meets with meter standards
  • Power supply (AC) from the meter
  • Compatible with Honeywell® AS220/AS230/ AS300, the AS1400 and the AS3000/AS3500 meters
  • Expansion module options
  • Surge protection option (from 4kV up to 12kV)
  • Embedded, realtime operation system
  • „Pull” data sending (for HES request), alarm triggered
  • „Push” data sending (FTP or IEC push, SMS trigger)
  • IEC 62056-21 protocol
  • Data encryption
  • Scheduled data sending or triggered by an alarm
  • Remote & safe firmware update and configuration
  • Supercapacitor option (for power outage and notification)
  • WM-E Term® application (mass configuration, FW refresh)
  • Device Manager® software (order options)

 

Application & Use Cases

 

Industries

Design and outfit

  • The modem PCB can be installed inside the meter enclosure – by modem enclosure rails
  • AC power from the meter
  • Compatibility with Honeywell® AS220/AS230/AS300, the AS1440 and the AS3000/AS3500 electricity meters

 

Expansion options

  • Relay board (switch operation/tariff)
  • Customer Interface outfit (RJ12, 6P6C)
  • MBUS interface (terminal block, transparent and non-transparent)
  • Ethernet interface (RJ45, operation and data transmission without a cellular module)
  • Supercapacitors (against power outages)

 

Operation

  • „Pull” data sending (for HES request), or alarm triggered
  • „Push“ data sending (Ftp or IEC data “push”, SMS triggering)
  • IEC 62056-21 protocol Mode C
  • Data encryption
  • Scheduled data sending trigger by an alarm
  • Immediate alarm notification (power outage, status)

 

Accessories

  • Optional SMA antenna (50 Ohm) – upon request
  • WM-E Term® configuration software

 

Technical data

WM-E3S Modem for AS meters – LTE Cat.1 module with 2G or 2G/3G “fallback”, LTE Cat.M/Cat.NB module with optional 2G “fallback”

WM-E1S

 

WM-E3S Modem for AS220/AS230/AS300 meters – LTE Cat.4 / 3G / 2G modules

WM-E1S

 

WM-E3S Modem for AS1440 and AS3000/AS3500 meters – LTE Cat.4 / 3G / 2G module

WM-E1S

Datasheet – WM-E3S Modem for AS meters – LTE Cat.1 module with 2G or 2G/3G “fallback”, LTE Cat.M/Cat.NB module with optional 2G “fallback”

Updated: 2023-09-01

Datasheet – WM-E3S Modem for AS220/AS230/AS300 meters – LTE Cat.1 / 2G or LTE Cat.4 / 3G / 2G modules

Updated: 2025-01-09

Datasheet – WM-E3S Modem for AS1440 and AS3000/AS3500 meters – LTE Cat.1 / 2G or LTE Cat.4 / 3G / 2G modules

Updated: 2025-01-09


Quick Guide (TELIT module version)

Updated: 2025-01-09

Quick Guide (SIMCOM module version)

Updated: 2025-01-09


Installation Manual (WM-E3S with TELIT modules)

Updated: 2025-12-03

Installation Manual (WM-E3S with SIMCOM modules)

Updated: 2025-12-03

Installation Manual (WM-E3S CI/CIR – Customer Interface/Relay board version)

Updated: 2025-12-03

WM-E Term User Manual

Updated: 2025-12-04

WM-E3S Parameter Description

Updated: 2025-09-30

WM-E Term Appendix

Updated: 2025-12-03


WM-E Term configuration tool

Updated: 2025-12-04

Video tutorial – Chapter 1. WM-E Term: Introduction

Video tutorial – Chapter 2. WM-E Term: How to Create a log file from the connected modem?

Video tutorial – Chapter 3. WM-E Term: Serial port connection settings

Video tutorial – Chapter 4. WM-E Term: Debug redirection

Video tutorial – Chapter 5. WM-E Term: How to change the Display Language?

Video tutorial – Chapter 6. WM-E Term: Use Log Files in WM-E Term (Tutorial video)

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