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| Interface M-Bus passive |
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Brief description |
M-Bus-interface to connect to the M-Bus-circut, for monitoring of M-Bus devices.
| Passive: |
Sender: |
Currentmodulator ΔI |
| |
Receiver: |
Voltagemodulator ΔU
|
The maximum lenght of the cable is 10 km, depending on cable type and load.
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M-Bus passive
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| 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 |
VCC1 |
+ 5V |
| 7 |
VCC2 |
+ 12V |
|
|
| Pin |
Name |
| 1 |
GND |
| 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
|
| Input Voltage UEIN |
min.
typ.
max.
|
12 V
36 V
50 V
( Δ U ca. 12 V) |
| Output Current IAUS |
typ. |
1,5 mA, 20 mA ( Δ I ca. 18 mA) |
| Supply Voltage VCC1 |
typ. |
5 V |
| Supply Voltage VCC2 |
typ. |
12 V |
| Transfer Rates |
|
300 to 19200 Baud |
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