---
lang: "en"
title: "Wireless M-Bus to M-Bus Gateway industrial version external antenna, WMBUS"
sku: "RelAir R2M PROX"
canonical_url: "https://shop.marcomweb.it/en/meterbus/wireless-m-bus-to-m-bus-gateway-industrial-version-external-antenna-wmbus"
brand: "MARCOM S.r.l."
end_of_life: "false"
---

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RelAir R2M HOME: Wireless M-Bus to M-Bus Gateway industrial version external antenna SMA connector

Wireless M-Bus to M-Bus gateway for more than 60 meters.RelAir R2M allows the integration of up to 63 wireless M-Bus meters into an existing M-Bus installation. For this purpose, the OMS-compliant gateway stores metadata and responds to a request from the M-Bus master with the latest response telegram. Due to the configurable whitelist, it is obviously possible to install multiple RelAir R2M in an M-Bus network. Thanks to the integrated mini USB interface, RelAir R2M can also be used as a fully operational wireless M-Bus master. Our new gateway works without an external power supply and is powered by the M-Bus (5 load units) or via the USB interface.

## Specifications:

- Wireless M-Bus according to EN 13757-4 Mode S, T and C specification
- Frequency 868 MHz
- OMS compliant and compatible (Spec 4.X.X)
- Optional encryption Mode 5 or 7, AES
- Power supply via M-Bus (5 unit loads) or USB
- Configurable whitelist for up to 63 meters
- Configuration with free software via M-Bus or USB
- External antenna with SMA connector
- Industrial type enclosure

---

Source: https://shop.marcomweb.it/en/meterbus/wireless-m-bus-to-m-bus-gateway-industrial-version-external-antenna-wmbus

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.