M-Bus Gateway Sirius
The Sirius is the larger of the two devices: integrated level converter for 250 M-Bus standard loads, designed for large building infrastructures. The compatibility list, commissioning and installation instructions apply to both devices and can be found on the overview page.
Features
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Installation with the free smart-me app.
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Integrated level converter for 250 M-Bus standard loads
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Integrated power supply
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Supports M-Bus devices according to EN 13757-2, -3 (formerly EN 1434-3). The standard defines the protocol, but not the data it contains. Compliance with the standard alone is therefore no guarantee of actual functionality. Check our compatibility list.
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Billing with the smart-me Billing Tool
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Interfaces via API, CSV, MSCONS and IS-E
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Encrypted real-time data connection to the smart-me Cloud
Technical data
| Feature | Value |
|---|---|
| Product certification | CE |
| Mains voltage | 230 VAC 50/60 Hz |
| Temperature range | -20°C to +50°C |
| Rel. humidity | Annual average 75%, non-condensing short-term 95%, non-condensing |
| Interfaces | WLAN, M-BUS |
| Communication | WLAN IEEE 802.11 b/g/n (2.4 GHz) |
| WLAN security standard | WEP, WPA-PSK/WPA2-PSK |
| Number of M-BUS slaves | 250 standard loads |
| M-BUS baud rate | 300, 2400, 9600 (automatic search and detection) |
| Galvanic isolation | Yes |
| Data storage | 131'056 readings 15min interval: 10 devices: ~136 days 50 devices: ~27 days 250 devices: ~5 days |
| Firmware update | Possible online |
| EMC immunity | EN 61000-6-2 (industrial environment) |
| EMC emission | EN 61000-6-3 (residential environment) |
| Protection class housing/terminals, use | IP20 / IP51 (installed in control cabinet), indoor |
| Mounting | DIN rail |
| Dimensions | 6 modules, W:105mm H:90mm D:65.7mm |
| Server location | Switzerland |
| Protection class | II |
| Data volume | ≤ 1KB per device per reading |
| Last modified | 26.03.2026 |
Shipping information
Article number: 262090 Article name: smart-me M-Bus Gateway Sirius
Customs tariff number: 9028.9000
Weight including packaging: 260g
Connection diagram
Button functions
Installation button (T1)
Press briefly once = Toggles installation mode
Reset button (T2)
Press briefly once = Reads out the MBUS slaves
Press and hold = Scans the M-BUS
Installation button (T1) and reset button (T2) simultaneously
Press and hold = Restarts the device
Downloads and declaration of conformity
(*.DXF data can be found in the ZIP archive)