ED6781 | EtherCAT Terminal, 1-channel communication interface, M-Bus, master, push-in
ED6781 | EtherCAT Terminal, 1-channel communication interface, M-Bus, master, push-in
+24 V DC
0 V
ED6781 | EtherCAT Terminal, 1-channel communication interface, M-Bus, master, push-in
ED6781 | EtherCAT Terminal, 1-channel communication interface, M-Bus, master, push-in
The ED6781 EtherCAT Terminal enables the direct connection of M-Bus devices. The M-bus (meter bus) is a fieldbus for consumption data acquisition from electricity, water, gas, and energy meters.
The M-Bus master and the connected M-Bus devices are conveniently configured and parameterized in the TwinCAT 3 System Manager. Programming is performed completely via TwinCAT 3 function blocks.
The ED6781 has an integrated power supply that can operate up to 80 M-Bus devices (standard loads) with a current consumption of 1.5 mA each.
The ED-series EtherCAT Terminals have push-in connection technology which makes wiring easy and tool-free.
Product status:
product announcement | estimated market release 1st quarter 2026
Product information
| General | ED6781 |
|---|---|
| Number of channels | Total | 1 |
| Internal communication protocol | EtherCAT |
| Communication interface | ED6781 |
|---|---|
| Number of channels | 1 |
| Function | M-Bus master |
| Interfaces | M-Bus |
| Protocol | M-Bus |
| Data transfer medium | copper |
| Device type | master |
| Transmission rate | 300...9,600 baud |
| Number of devices | 80 |
| Device type | M-Bus slave |
| Device | Supply voltage | 36 V DC |
| Device | Supply current | 120 mA |
| Termination resistor | no |
| Cable length | Point-to-point | max. 300 m |
| Connection technology | push-in |
| XFC | ED6781 |
|---|---|
| Distributed clocks | no |
| Timestamp | no |
| Oversampling | no |
| Supply and electrical isolation | ED6781 |
|---|---|
| Electronics | Supply voltage | via power contacts |
| E-bus | Current consumption | typ. 70 mA |
| Power contacts | Input voltage | 24 V DC (-15%/+20%) |
| Power contacts | Current carrying capacity | max. 10 A DC |
| Power contacts | Current consumption | – |
| Power contacts | Output voltage | corresponds to Power contacts | Input voltage |
| Electrical isolation | Channel/bus | functional, 707 V DC type test |
| Environmental conditions | ED6781 |
|---|---|
| Operating temperature | 0…55°C |
| Storage temperature | -25…+85°C |
| Relative humidity | 95%, no condensation |
| Installation position | variable |
| Standards and approvals | ED6781 |
|---|---|
| Vibration resistance | conforms to EN 60068-2-6 |
| Shock resistance | conforms to EN 60068-2-27 |
| EMC immunity | conforms to EN 61000-6-2 |
| EMC emission | conforms to EN 61000-6-4 |
| Markings | CE |
| Approvals | UL (in preparation) |
| Housing data | ED-12-8pin | EF-12-8pin |
|---|---|---|
| Weight | 55 g | 60 g |
| Protection rating | IP20 | |
| Material | polycarbonate | |
| Dimesnions | Width (single) | 15 mm | |
| Dimensions | Width (lined up) | 12 mm | |
| Dimensions | Height | 100 mm | |
| Dimensions | Depth | 65 mm | |
| Installation | Terminal/back wall | DIN rail, 35 mm (EN 60715) | |
| Installation | Terminal/terminal | double slot and key connection | |
| Plug-in wiring level | no | yes |
| Connection technology | push-in | |
| Connection cross-section | Solid wire | 0.08…2.5 mm² | 0.08…1.5 mm² |
| Connection cross-section | Stranded wire | 0.08…2.5 mm² | 0.08…1.5 mm² |
| Connection cross-section | With ferrule | 0.14…1,5 mm² | |
| Connection cross-section AWG | Solid wire | AWG28…14 | AWG28…16 |
| Connection cross-section AWG | Stranded wire | AWG28…14 | AWG28…16 |
| Connection cross-section AWG | With ferrule | AWG26…16 | |
| Stripping length | 8…9 mm | 9…10 mm |
| Power contact | "+" (left) | yes | |
| Power contact | "+" (rechts) | yes | |
| Power contact | "-" (left) | yes | |
| Power contact | "-" (right) | yes | |
| Power contact | "⏚" (left) | no | |
| Power contact | "⏚" (right) | no | |
| Insertion lock for power contact “⏚” | yes | |
| Ordering information | |
|---|---|
| ED6781 | EtherCAT Terminal, 1-channel communication interface, M-Bus, master, push-in |
| EF6781 | EtherCAT Terminal, 1-channel communication interface, M-Bus, master, push-in, pluggable wiring level |
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