T H E M O D E R M - B U S T E C H N O L O Y
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Description of the different connections
3.1
Relay, plint 1-3
PiiGAB M-Bus 900S contains a relay. This can be used to for example control different functions
such as turning on and off the outside lights in a residential area. This is done by sending a M-
Bus written command to the internal meter inside the PiiGAB M-Bus 900S
Figure 3-1
The status can be read for the different I/O signals in the page ”Status” and section ”Digital I/O
and Relay” in
the web interface. The status for the relay can also be read via the internal M- Bus
meter inside the PiiGAB M-Bus 900S.
To activate the relay use the write function for the internal M-Bus meter in PiiGAB M-Bus 900S.
When there is no voltage the relay will be as shown in the position below.
3.1.1
Connection relay
Figure 3-2
3.2
Digital inputs, plint 4-7
PiiGAB M-Bus 900S contains two different digital inputs. Adequate usage can be for digital
status, alarms, broken seals etc.
Figure 3-3
The status can be read for the different I/O signals in the
page ”Status” and section ”Digital I/O
and Relay” in the
web interface. The status for the relay can also be read via the internal M- Bus
meter inside the PiiGAB M-Bus 900S.
The inputs are completely galvanic isolated between each other and the earth.
Chapter
3