6
5.2.1 Sensors and M-Bus connection
The connection of temperature sensors are shown in
figure 5.2 and table 5.1, according to EN1434.
Warning:
Do not connect the M-Bus to the wrong
terminal or the meter can be seriously
damaged when the M-Bus loop is
powered.
5.2.1.1 EN1434 terminal table
Termi
nal
no.
Signal description
1
High** temp. sensor*
2
High** temp. sensor*
3
Low** temp. sensor*
4
Low** temp. sensor*
5
High** temp. sensor
6
High** temp. sensor
7
Low** temp. sensor
8
Low** temp. sensor
10
Flow sensor signal input (+)
11
Flow sensor signal input (-)
24
M-Bus interface
25
M-Bus interface
Table 5.1, terminal connection according to EN1434
* Only for 4-Wire connection
** High = Supply, Low = Return
1 –
5 – 6
– 2
3 –
7 – 8
– 4
10 – 11
24 – 25
Fig 5.2, Numbering of terminal according to
EN1434, ( numbering from left to right ).
