Cellular modem for Iskra MT830, MT831 electricity meters. Available for LTE Cat.4, LTE Cat.1 / 2G / 3G, Cat.M and Cat.NB networks
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 electricity meters.
These devices were designed to fit under the terminal cover of the meter and are compliant with the Iskra 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.
| 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 |
| Interfaces, Physical Connectors | RS232 (D-SUB9 or 2-wire), RS485 (2-wire or 4-wire) |
| Meter compatibility | ISKRA MT830, MT831 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) option, Surge protection |
The WM-E1S ISKRA modem’s case was designed to fit under the terminal cover of the mentioned meters and can be connected to the meter through RS232 or RS485 connection. It can be configured to “push” the data it reads from the meter to the HES periodically at pre-programmed intervals or triggered by an alarm/event (for example, power outage, cover removal, reverse run etc.).
The modem reads actual and stored consumption data, recorded event logs, that can be used to read or modify certain parameters of the meter remotely. The device can be powered from the meter’s mains connection of the 57/100V AC power network (phase voltage) or 230/400V AC power network (line voltage).
It can be accessed remotely through the cellular network and it can send data on the Internet by using an APN.
The modem is fully configurable by our WM-E Term® software.
Datasheet – WM-E1S ISKRA – LTE Cat.4 / 3G / 2G module options
Updated: 2025-02-04
Datasheet – WM-E1S ISKRA – LTE Cat.1 module options with 2G or 2G / 3G “fallback”, LTE Cat.M / Cat.NB modules with optional 2G “fallback”
Updated: 2025-02-04
Quick Reference Guide
Updated: 2025-02-17
Installation Manual
Updated: 2025-10-27
WM-E Term User Manual
Updated: 2025-09-29
WM-E1S ISKRA Parameter Description
Updated: 2025-02-05
WM-E Term Appendix
Updated: 2025-01-22
WM-E Term configuration tool
Updated: 2025-09-29
WM-E1S sample configuration file for WM-E Term (compressed ZIP file, extract the CFG file)
Updated: 2023-11-27
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)
4G LTE antenna with magnetic mount, SMA connection, 2.5m long RG174 cable, 6dBi max. gain
The remote management and maintenance of an IIoT solution can be a real challenge. Improve the network availability and operational efficiency of your fleet!