RS232toMBus-4SL
RS232 to M-Bus communication converter
This converter is no longer produced. It was replaced by RS232MBus-5M.
Application
Remote data retrieval from M-Bus devices via the RS232 serial communication line in building automation. From the point of view of robustness the converter cannot be utilized in industrial environments. The most frequently used M-Bus slave devices are heat, water and electricity consumption meters.
Description
The RS232toMBus-4SL converter provides a RS232 to M-Bus interface conversion. There is no change in the content of the messages or communication speed during the conversion. The maximum number of M-Bus slave devices that can be connected is four.
Main characteristics
M-Bus port
- Connection of 1 to 4 M-Bus slave devices.
- Surge protection guaranteeing superior durability against overvoltage.
- Current protection against overload and short circuit on the communication line with LED status indication.
Power supply
- Wide range of power supply voltages. DC 8-28V and AC 8-20V.
- Overvoltage protection.
- LED power supply indication.
RS232
- Signals: TxD, RxD and GND
- Protections against overvoltage.
Mechanical construction
- Plastic box with mounting on 35 mm DIN rail.
- Narrow box. 17.5mm mounting width on the DIN rail.
Differences from the RS232toMBus-4M converter
- Very small mounting width on the DIN rail.
- M-Bus line has a galvanic connection to the power port and the RS232 communication line.
- DC and AC power supply.
- Only positive operating temperatures (on the Celsius scale).
Guarantee of quality
- Each converter passes through several functional electrical tests during the production. Additionally a communication test is performed after final assembly.
- EMC certification for habitable environments by an accredited laboratory .
- Solid design and construction based on many years practical experience.
| RS232 communication interface | |
|---|---|
| Communication signals | RxD, TxD and GND |
| Protection | protection against ±15kV ESD, filters |
| Galvanic separation | without galvanic separation |
| Connector | terminals for wires of up to 2.5 mm² cross-section area |
| M-Bus Master communication interface | |
| Number of devices that can be connected | 1 to 4 SLAVE devices, idle current max. 6 mA |
| Baud rate | 300 – 9600 bps |
| Protection | – overvoltage protection TVS 600W |
| – electronic protection against overloads and short circuit on the communication line | |
| note: converter can withstand sustained short circuit on the communication line | |
| Galvanic separation | without galvanic separation |
| Connector | terminals for wires of up to 2.5 mm² cross-section area |
| Power supply | |
| Recommended range of power supply voltages | |
| DC power supply | 8V to 28V |
| AC power supply | 8V to 20V |
| Protection | – overvoltage protection TVS 600W |
| Power consumption | 0.3W to 1W Depends on M-Bus line load and power supply. |
| Connector | terminals for wires of up to 2.5 mm² cross-section area |
| Status LEDs | |
| Power – green | indication of connected supply voltage |
| Transmit – green | indication of data broadcasting on the M-Bus line |
| Receive – yellow | indication of data reception on the M-Bus line |
| Overload/Short – red | indication of M-Bus line overload – flashing (idle current > 8mA) |
| indication of short on the M-Bus line – turned on (resistance of the line < 500Ω) | |
| Temperature | |
| Operating range | 0°C to 80°C |
| Mechanical construction | |
| Mechanical design | plastic box |
| Mounting | 35 mm DIN rail (EN 50022 top hat rail) |
| Dimensions: height x width x length | 56.5 x 17.5 x 97.5 mm |
| Protection classification | IP20 |
| Weight | 46g |
EMC compatibility of the M-Bus converter has been tested according to the following home environment standards.
| EMC emission tests | ||
|---|---|---|
| Standard | Test | Level |
| EN 55022 | Power line – CONDUCTED EMISSIONS 10/150 kHz – 30 MHz | Class B |
| EN 55022 | RADIATED EMISSIONS (Electric Field) 30 MHz – 1000 MHz | Class B |
| EMC immunity tests | ||
|---|---|---|
| Standard | Test | Level |
| EN 61000-4-2 | ELECTROSTATIC DISCHARGE (ESD) – Contact discharge | ± 4 kV |
| EN 61000-4-2 | ELECTROSTATIC DISCHARGE (ESD) – Air discharge | ± 8 kV |
| EN 61000-4-4 | ELECTRICAL FAST TRANSIENT/BURST – Power line | ± 4 kV |
| EN 61000-4-4 | ELECTRICAL FAST TRANSIENT/BURST – M-Bus line | ± 4 kV |
| EN 61000-4-5 | SURGE IMMUNITY – Power line. Common/differential mode. | ± 1 kV / ± 0.5 kV |
| EN 61000-4-5 | SURGE IMMUNITY – M-Bus line. Cable shielding. | ± 4 kV |
| EN 61000-4-5 | SURGE IMMUNITY – M-Bus line. Common/differential mode.* | ± 2 kV / ± 1 kV |
| EN 61000-4-6 | CONDUCTED DISTURBANCES, INDUCED BY RADIO-FREQUENCY FIELDS 0.15MHz – 80 MHZ. Power line and M-Bus line. | 3 V |
* test carried out at the request of the manufacturer. The M-Bus port has an increased durability against overvoltage. Carrying out this type of test is not required with the use of shield cable.
End user
Price list for individuals and companies which do not buy converters for resale.
Integrator
Price list for companies which buy converters for the purpose of resale to their custommers as manufacturers or suppliers.
The price list is available only to registered business partners.
Registration request.
Leaflet
Manuals
Contents
Typical application
Typical wiring of the converter with M-Bus devices, power supply and a RS232 serial communication link connection to a computer.
LED indication
| Status LEDs | Color | |
|---|---|---|
| Power | Indication of connected supply voltage. | green |
| Overload/Short | Indication of short and overload on the M-Bus line. | red |
| – indication of a short on the M-Bus line (resistance of line < 500 Ω) – LED turned on | ||
| – indication of M-Bus line overload – alternating flashing of Overload/Short LED and Receive LED | ||
| Receive | Indication of data reception on the M-Bus line. | yellow |
| Transmit | Indication of data transmission on the M-Bus line. | green |
Connectors on the Power Supply and RS232 side
| Connectors | Type | |
|---|---|---|
| Power | Connector for power supply. | built-in |
| RS232 | Connector for the RS232 interface. | built-in |
