| |
 |
| Interface M-Bus active |
|
 |
Brief description |
M-Bus-interface to connect to the M-Bus-circut, for monitoring of M-Bus devices.
| Active: |
Sender: |
Voltagemodulator ΔU
|
| |
Receiver: |
Currentmodulator ΔI |
There is a maximum of 10 connected receivers.
The maximum lenght of the cable is 10 km, depending on cable type and load.
|
M-Bus active
|
|
| TTL/CMOS pin assignment (left) |
M-Bus pin assignment (right)
|
| Pin |
Name |
| 1 |
- |
NC |
| 2 |
- |
NC |
| 3 |
TxD |
Input |
| 4 |
RxD |
Output |
| 5 |
GND |
|
| 6 |
- |
NC |
| 7 |
VCC |
+ 12V |
|
|
| Pin |
Name |
| 1 |
NA |
| 2 |
NA |
| 3 |
M-Bus 1 |
| 4 |
M-Bus 2 |
| 5 |
NA |
|
|
| NC = |
not connected |
= |
nicht angeschlossen |
| NA = |
not available |
= |
nicht vorhanden |
|
Recommended operating conditions and electrical characteristics
|
| Galvanic separation of In- and Outputs |
|
no |
| |
| Output Voltage UAUS |
typ. |
36 V ( Δ U ca. 12 V ) |
| Input Current IEIN |
typ. |
1,5 mA, 20 mA ( Δ I ca. 18 mA) |
| Transmission display |
|
1 LED |
| Supply Voltage VCC |
typ. |
12 V |
| Transfer Rates |
|
300 to 19200 Baud |
|
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