GWFcoder® -Interface
M-Bus / M-Bus / SCR MP
Kategorie produktowe
Woda,
Ciepłomierze / Chłodomierze,
Gaz
Remote meter reading
Woda
Woda pitna
Ciepłomierze / Chłodomierze
Gaz
Smart City
Korzyści
- Interface multiplication:
Multiple use of meter data - Use of a GWFcoder® meter with SCR (IEC) interface in an M-Bus network:
Meter data can be made available to the end customer - Labeled connection terminals:
Easy on-site installation
Zastosowanie
- With the interface, water and gas meters equipped with GWFcoder® registers can be read by the utility for billing purposes and by the building management system for energy optimization.
Cechy
- Data compatibility – for the M-Bus master, the interface behaves like a GWFcoder® meter with integrated M-Bus
- Polarity-independent connection of GWFcoder® meters to the interface
- DIN rail mounting
- With the interface, a GWFcoder® meter with SCR (IEC) interface can be integrated simultaneously into two separate M-Bus networks. The interface automatically reads the GWFcoder® register at predefined intervals and stores the current data set in the internal memory.
When a readout via M-Bus is performed, the data are immediately available and transmitted to the master.
Product information
Components
General Operating Behavior
- The start-up time after power ON is max. 15 seconds. The interface automatically reads the data from the GWFcoder® register.
- After successful readout of the GWFcoder® register, the interface can be selected and read out by the M-Bus master.
- The readout software must support interpretation of the GWFcoder® data record. The data record is compatible with the data record of GWFcoder® meters with integrated M-Bus. This data record is already supported by most providers.
Readout Interval
- The meter reading is updated in the interface after each readout and additionally every 15 minutes.
- If the meters are read cyclically within the M-Bus network, a pause of at least 15 seconds must be observed at the end of each cycle.
- The readout interval of the interface must not be less than 15 seconds.
Commissioning
- During commissioning, the baud rate for “M-Bus a” and “M-Bus b” must be verified and, when using primary addressing, the address must be parameterized. The secondary address is read directly by the interface from the GWFcoder® register.
- “M-Bus a” must be connected, as the interface is powered via this connection.
- After replacing a meter, “M-Bus a” must be restarted (power OFF/ON), and the meter list of both M-Bus networks must be updated in the readout software.
- After replacing the interface, the baud rate and, if applicable, the primary address must be reconfigured.
Technical Data
| Data Transmission – M-Bus | |
|---|---|
| Baud rate M-Bus a | 2400 Baud (Standard) or 300 Baud |
| Baud rate M-Bus b | 2400 Baud (Standard) or 300 Baud |
| Primary address M-Bus a | 1–250 |
| Primary address M-Bus b | 1–250 |
| Secondary address | GWFcoder® meter number – 8 digits, numeric |
| M-Bus Load | |
|---|---|
| Load | M-Bus a: 5 M-Bus unit loads (7.5 mA – supply) |
| Load | M-Bus b: 2 M-Bus unit loads (3 mA – supply) |
| Installation | |
|---|---|
| The interface can be installed at the M-Bus master or at the meter. | |
| Maximum Cable Length | |
|---|---|
| SCR connection cable | 150 m |
| M-Bus connection cable | Depending on network configuration |
| Dimensions and Weight | |
|---|---|
| Dimensions | 25x78x47 mm |
| Weight | approx. 50 g |
| Operating Conditions | |
|---|---|
| Temperature | -10 bis +60 °C |
| Protection class | IP40 |
| Interfaces | |
|---|---|
| M-Bus according to EN 13757 | |
| Inductive via SCR / protocol IEC 62056-21 | |
| Mounting Type | |
|---|---|
| DIN rail mounting | |
| Supported Meters | |
|---|---|
| GWFcoder® cold water and gas meters with SCR (IEC) interface | |
Meter Connection Scheme
| Meter Type | Connection Wires | |
|---|---|---|
| MTKcoder® IP67 | Without approval, CE conformity (MID) | white, brown |
| MTKcoder® IP68 | Without approval, CE conformity (MID) | black, red (cut green wire) |
| MTKcoder® MP IP67 | CE conformity (MID) | white, brown |
| MTKcoder® MP IP68 | CE conformity (MID) | black, red (cut green wire) |
| WPDKcoder WSDKcoder Meitwin mit GWFcoder® WPVD mit GWFcoder® | Ohne Zulassung | black, red (cut brown wire) |
| Meistream mit GWFcoder® Meistream Plus mit GWFcoder® Meitwin mit GWFcoder® WPV-MS mit GWFcoder® | CE conformity (MID) | white, brown |
| Meistream mit GWFcoder® MP Meistream Plus mit GWFcoder® MP Meitwin mit GWFcoder® MP WPV-MS mit GWFcoder® MP | CE conformity (MID) | black, red (cut green wire) |
| Connection and Signal Transmission / Interface | |
|---|---|
| M-Bus a +/- | M-Bus master according to EN 13757-2, supervisory system After power ON, the interface requires 15 seconds to become operational. Power supply via “M-Bus a”. |
| M-Bus b +/- | M-Bus master according to EN 13757-2, supervisory system After power ON, the interface requires 15 seconds to become operational. |
| Ea | GWFcoder® register (polarity-independent) |