T H E M O D E R N M - B U S T E C H N O L O G Y
PiiGAB Process Information i Göteborg AB
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0M
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Technical structure
2
The interface of the gateway consists of an Ethernet connection, a serial port, four
parallel outputs for the M-Bus connections, and a connection for voltage supply.
There is also a possibility to connect a safety earth
when the gateway is being
used in environments with a lot of disturbance.
On the front of the gateway there are three diode lamps that are indicating the
voltage feed, transmit and response of the M-Bus messages. The voltage diode
lamp has different behaviors depending on normal running, short circuit, or
overload of the M-Bus loop.
2.1
Connections
In the table bellow you will find information about how to connect to the 12 pins
screw terminal.
Table 2-1. Connections
Connection Term
Description
1
AC/DC+
The gateway is powered by 24V AC or DC. When
DC is used connect the positive + cable to
connection 1.
2
AC/DC-
When DC is used connect the negative – cable to
connection 2.
3
GND
This connection is used when it is problem with
disturbances or interferences at the main power
line or the M-Bus loop.
4
--
Not used
5
M-Bus
Connection for M-Bus loop 1
6
M-Bus
Connection for M-Bus loop 1
7
M-Bus
Connection for M-Bus loop 2
8
M-Bus
Connection for M-Bus loop 2
9
M-Bus
Connection for M-Bus loop 3
10
M-Bus
Connection for M-Bus loop 3
11
M-Bus
Connection for M-Bus loop 4
12
M-Bus
Connection for M-Bus loop 4
Chapter
2