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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Technical structure
The gateway’s interface consists of one Ethernet connection, one RS232, one RS485,
two
separate M-Bus slave inputs, four parallel outputs for M-Bus loops, two digital inputs and one
relay output as well as a voltage connection.
There are ten leds on the front of the gateway with different kind of information please see the
table in section 2.2.
2.1
Connections
2.1.1
Connections on the upper 18 pin connector
Figure 2-1
Table 2-1
Chapter
2
Connection Term
Description
1
Relay NO
Relay output normally open
2
Relay COM
Relay output
3
Relay NC
Relay output normally closed
4
DI1 +
Digital input 1
5
DI1 -
Digital input 1
6
DI2 +
Digital input 2
7
DI2 -
Digital input 2
8
RS485 A
Connection for RS485
9
RS485 B
Connection for RS485
10
R485 GND
Connection for RS485 GND
11
RS232 Rx
Connection for RS232 Rx
12
RS232 Tx
Connection for RS232 Tx
13
RS232 GND
Connection for RS232 GND
14
X
Not used
15
M-Bus Slave 1
Connection to already existing M-Bus loop with belonging M-Bus
master. Polarity independent.
16
M-Bus Slave 1
Connection to already existing M-Bus loop with belonging M-Bus
master. Polarity independent.
17
M-Bus Slave 2
Connection to already existing M-Bus loop with belonging M-Bus
master. Polarity independent.
