Universal cellular modem for industrial automation with RS232 and RS485 cable. Available for LTE Cat.1, 2G, 3G, 4G, LTE 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 from GSM / UMTS 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.
| Device type | Universal cellular modem |
|---|---|
| Primary use case | Industrial Automation, Industrial Data Collection, Smart metering (AMI/AMR), Smart Grid |
| 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 RJ12), RS485 (2-wire or 4-wire or RJ12) |
| Meter compatibility | Universal meter, it can be installed to any kind of meter system |
| 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) |
| 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 |
Our universal, external modem is easily mountable on a DIN-rail and operates from a 230V external power supply.
The case design and interfaces meet the industry standards and the strict requirements of the large meter manufacturers.
This device allows us to connect all kinds of industrial measurement systems with a central server by creating a transparent data link between a local system and an IP address or HES.
The modem offers remote access and configuration features.
Product Datasheet
Updated: 2023-11-22
User Manual
Updated: 2025-10-17
WM-E Term User Manual
Updated: 2025-12-04
Parameter Description
Updated: 2025-10-02
WM-E Term Appendix
Updated: 2025-01-22
WM-E Term configuration tool
Updated: 2025-12-04
Factory configuration file (for WM-E Term software)
Updated: 2021-11-02
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!