The HMS SG-gateway with M‑Bus interface is a remote terminal unit that connects up to 32 meters and supports IEC61850, IEC60870‑5‑104, Modbus and…
The SG‑gateway is designed for the energy market to enable remote control and management of electrical equipment and to translate data between M‑Bus meters and IEC61850 or IEC60870‑5‑104 protocols. It supports up to 32 metering devices, offers Ethernet, 3G, and serial interfaces, and includes an embedded web editor for custom logic functions.
Technical details include a compact metal housing (70 × 46 × 105 mm, IP20), 24 VDC power supply with 120 mA max consumption, two digital S0 inputs, two high‑side digital outputs (500 mA), and a range of communication ports such as Ethernet 10/100Base‑T, selectable RS‑232/RS‑485/RS‑422, and an M‑Bus master capable of 5 km links.
| Dimensions (L×W×H) | 70 × 46 × 105 mm |
|---|---|
| Protection class | IP20 |
| Power supply | 24 VDC ±15 % |
| Maximum current consumption | 120 mA at 24 VDC |
| Digital S0 inputs | 2 × 10 mA (typ) |
| Digital outputs | 2 × high‑side, 24 VDC, max 500 mA |
| Operating temperature | 0 °C to 55 °C |
| Ethernet interface | 1 × 10/100Base‑T RJ45 |
| Serial interface | 1 × RS‑232/RS‑485/RS‑422 selectable |
| M‑Bus capacity | Up to 32 devices, up to 5 km @ 300 bps |
| 3G modem | Tri‑Band UMTS (850/1900/2100 MHz) |
The gateway can connect up to 32 M‑Bus devices.
It supports IEC61850 client/server, IEC60870‑5‑104 client/server, Modbus TCP client/server, Modbus RTU master/slave, and M‑Bus master.
It operates from a 24 VDC supply with a tolerance of ±15 % and a maximum current draw of 120 mA.
The gateway provides two high‑side transistor outputs, 24 VDC, rated for up to 500 mA and are short‑circuit and overload resistant.