GW-7828
Modbus RTU Slave to M-Bus Master Gateway
Features
- Supports M-Bus standard: EN-13757, CJ/T -188
- Supports Modbus RTU function code 0x03 and 0x04 to read Meter data
- Supports up to 100 M-Bus slaves
- M-Bus over current protection
- Short-circuit protection on the M-Bus
- Update firmware from serial port
Introduction
The M-Bus ("Meter-Bus") is a standard for remote reading of meters. It is usable for most types of consumption meters as well as for various sensors and actuators. The GW-7828 is specially designed for M-Bus slave device. It offers Modbus RTU communication by three kinds of interface, RS-232, RS-422 and RS-485. On hardware the GW-7828 has two rotary switches for serial port and M-Bus port baud rate. GW-7828 supports Modbus RTU function code 0x03 and 0x04 to read data of M-Bus meters. Through this design, it is easy to communicate with any standard M-Bus slave.
Applications
The M-Bus (Meter‐Bus) is a bus optimized for the reading of measurement instruments like: energy counters, hot and cold water counters, gas, pressure, sensors and actuators, etc.….
Ordering Information
| PRODUCT SERIES | DESCRIPTION | QNT. | INQUIRY |
|---|---|---|---|
This combination include other products.
Similar Products
| COM Ports | |
|---|---|
| Ports | 1 x RS-232 1 x RS-422 (can't be used simultaneously) 1 x RS-485 |
| Baud Rate | 300 bps ~ 115200 bps |
| Parity | None, Even, Odd, Space, Mark |
| Data Bit | 5, 6, 7, 8 |
| Stop Bit | 1, 2 |
| M-Bus | |
|---|---|
| Baud Rate | 300 bps ~ 2400 bps |
| Data Bit | 5, 6, 7, 8 |
| Stop Bit | 1, 2 |
| Parity | None, Even, Odd, Space, Mark |
| Isolation | 3750 Vrms for photo-couple |
| Current Protection | short-circuit protection |
| Power | |
|---|---|
| Consumption | 1.8 W @ 24 VDC (with 1 slave device) 11.8 W @ 24 VDC (with 100 slave devices) |
| Mechanical | |
|---|---|
| Dimensions (mm) | 72 x 122 x 33 (W x L x D) |
| Installation | DIN-Rail |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +60°C |
| Storage Temperature | -40 ~ +80°C |
| Humidity | 10 ~ 90% RH, Non-condensing |
- Provide M-Bus and serial bus user-defined baud rate
- Check firmware version
- Configure meters list of M-Bus gateway
- Test reading meters data
- Update firmware
|
Baud Rate Selection by Rotary Switch
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| Switch Value | 0 | 1 | 2 | 3 | 4 | 5 |
| Baud [bps] | 300 | 600 | 1200 | 2400 | 4800 | 9600 |
| Switch Value | 6 | 7 | 8 | 9 | A ~ F | |
| Baud [bps] | 19200 | 38400 | 57600 | 115200 | User-defined | |
| The data format of serial bus baud rate of switch value 0 ~ 9 is 8, n, 1. The data format of M-Bus bus baud rate of switch value 0 ~ 9 is 8, e, 1. |
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Execution Mode by DIP Switch
|
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| DIP 1 (Init) | DIP 2 (Mode) | Description |
|---|---|---|
| OFF | OFF | Run Firmware |
| OFF | ON | Configure |
| ON | OFF | Update Firmware |
|
Support Meter
The following meters have been tested with the GW-7828 communication: |
|||
| Manufacture | Picture | Model Type | Meter Type |
|---|---|---|---|
| Danfoss |  |
SONOMETER 500 | Heat Meter |
| SENSUS |  |
405S | Water Meter |
| WESER |  |
PUL | Heat Meter |
| DIEHL |  |
ALTAIR V4 | Water Meter |
| Wason |  |
LXZD-Y3 | Water Meter |
