M-Bus level converter, compatible with RTU EVO datalogger. Available in two models for 60 and 250 M-Bus wired devices respectively. It can be used as a master or as a repeater to extend an existing network. Only available with external power supply.
The 1.ETRSEQ.0003 M-Bus level converter allows interfacing to a network of devices compliant with the M-Bus standard (EN 13757-2 Physical Layer) up to a maximum of 60 slaves. It is developed to be used in combination with 1.ETRSEQ.0101 to extend the MBUS network and connect additional devices, or as a traditional M-Bus repeater. Additionally, it can be used with a specific PC software for reading data on site.
It can be used as a master in an M-Bus network connected through the dedicated port to the data logger, or as a repeater in order to extend an existing M-Bus network with up to 60 additional devices. Its modularity allows the optimization of the reading system cost. In “master” mode the device allows data loggers (for example 1.ETRSEQ.0051) to communicate with the MBus devices connected to the M-Bus Master port. The data logger must be connected to the level converter via the dedicated port. In “repeater/slave” mode the device works as a signal amplifier/regenerator, thus allowing for the extension of an existing M-Bus network in terms of distance and total devices connected.


| ELECTRICAL CHARACTERISTICS | |
| Rated voltage | 24 Vdc ±10% (rev. HW 1.0 or if not specified) 24 Vdc ±10%, 24 Vac (min. 20 Vac, max. 40 Vac) for HW 2.0 versions |
| Installation category | Class III |
| Rated consumption | 3 W + (0.07* number of M-Bus slave) |
| Maximum consumption | 12 W |
| MECHANICAL CHARACTERISTICS | |
| Operating temperature range | −10 °C to +55 °C |
| Storage temperature range | −25 °C to +65 °C |
| Dimensions | 90 × 71 × 62 mm (H × L × D) – DIN |
| Installation type | 35 mm DIN bar (EN 60715) |
| Protection rating | IP20 (EN 60529) |
| Connections | M-Bus slave: for connection as a repeater / extender M-Bus master: for connection to M-Bus meters Mini-USB Type B: for connection to PC software |
| M-BUS SECTION | |
| Reference standard | EN 13757-2 (Physical Layer) |
| Baud rate | Min. 300 bps – Max. 9600 bps |
| M-Bus-RS232 isolation | 1 kV AC |
| M-Bus-USB isolation | 1 kV AC |
| Max. number of M-Bus devices | 60 |
| Max. number of repeaters | Unlimited in stand-alone mode for reading current data via an RS232 or USB connection Four (4) as a slave of data logger 1.ETRSEQ.0051 |
| Transmission speed | Minimum: 300 bps Typical: 2400 bps Maximum: 9600 bps |
| Bus voltage | Min. 21 V Max. 42 V |
| Short-circuit protection | Yes |
| SIGNALING LEDs | |
| USB Activity (orange LED) | Connection status with PC software |
| TXD (green LED) | Transmission status on the M-Bus master |
| RXD (green LED) | Reception status from the M-Bus master |
| M-Bus ERROR (red LED) | Indicates a short circuit or the overloading of the M-Bus |
| M-Bus Ready (green LED) | Indicates the correct polarization of the M-Bus |
| POWER (red LED) | Indicates the correct power supply of the device |
The M-Bus level converter 1.ETRSEQ.0006 allows interfacing to a network of M-Bus compliant devices (EN13757-2 Physical Layer) and supports up to 250 slaves*. It is developed to be used in combination with 1.ETRSEQ.0051 dataloggers. It can be used in standalone mode via RS232 / RS485 port or as an M-Bus repeater.
* Slave means an M-Bus load unit (≤ 1.5 mA)
It can be used as master in an M-Bus network of 250 devices connected on a single line. It can be connected:
The device has a 24V DC power output that can supply a 1.ETRSEQ.0051 datalogger.


| ELECTRICAL CHARACTERISTICS | |
| Power Supply | 110 … 240 VAC, 47 … 63 Hz through dedicated power supply included |
| Installation category | II Class as per EN 62368-1 |
| Rated consumption | 6W + (0.07W * number of M-Bus slave) |
| Maximum consumption | 45W, 45 VA Vout: DC 24V, max 15 VA |
| MECHANICAL CHARACTERISTICS | |
| Operating temperature range | From -20°C to +55°C |
| Storage temperature range | From -25°C to +65°C |
| Materials and colours | PC+ASA, RAL9010 (white) |
| Dimensions | (2x) 110x71x62 mm (HxLxD) – including terminals |
| Installation | 35mm DIN bar (EN60715) |
| Protection degree | IP20 (EN60529) MOD 07 AA Rev. 0 |
| EU conformity (CE) | MOD 07 AA Rev. 0 |
| Connections | 110 … 240 VAC power supply Functional Earth Vin LC/Vout LC: Power supply for level converter/repeater Vout 24 V DC (Max 15 VA) M-Bus Slave: for connection as a repeater/extender RS485: connection for datalogger and software RS-232: connection for datalogger and software M-Bus Master: for connection to the M-Bus meter network |
| Buttons | Buttons Firmware update button |
| M-BUS SECTION | |
| Reference standard | EN13757-2 (Physical Layer) |
| Baud rate | Min. 300bps – Max. 9600bps |
| Max number of M-Bus devices | 250 (≤ 1,5 mA) |
| Max number of Repeaters | Up to 6 with parallel connection |
| Voltage on the Bus | 39 V |
| Short-circuit protection | Yes |
| Galvanic isolation | Yes (See EN13757-2) |
| Galvanic isolation M-Bus Master – M-Bus Slave | Yes |
| Echo Cancellation | Yes |
| Collision Detect with Break-Signalling | Yes |
| SIGNALING LEDs | |
| Run (Green Led) | Operating status of the device |
| TX M-Bus (Green Led) | M-Bus Master transmission status |
| RX M-Bus (Orange Led) | M-Bus Master reception status |
| Short Circuit (Red Led) | Indicates a short circuit of the M-Bus Master line |
| Overload (Orange) | Indicates overload of the M-Bus Master line |
| Power (Green Led) | Indicates the correct power supply of the device |
| PACKAGE | |
| Level Converter + QuickStart Guide | 0.166 Kg |
| Packaging | 0.055 Kg |
| NATIONAL SAFETY REGULATIONS | Failure to comply with national safety regulations may result in personal injury and property damage. Observe national provisions and comply with the appropriate safety regulations. This equipment is not suitable for use in locations where children are likely to be present. |