17
4.2 General
data
Nominal size q
p
: 0.6 – 60 m
3
/h
Ambient temperature: 5 … 55 °C
Medium temperature: 5 … 130 °C (150 °C), depending on variant and nominal size
4.3 Power
supply
External power supply
230 V AC module / 24 V AC module (Fig. C, item 2, page 10)
Terminals suitable for wires up to 2.5 mm²
Electrical
isolation
Frequency 50 Hz
Power consumption 0.12 VA ±10 %
Soldered fuse (50mA)
The cable is to be fused at max. 6A and protected against manipulation.
4.4 Calculator
interfaces
4.4.1 Communication modules
M-Bus
M-Bus module to EN 1434-3 standard
2 wire terminal with marking “24” and “25”
Terminals suitable for a cable with 2 wires of 2.5 mm²
Electrical
isolation
Polarity reversal protection
Maximum voltage: 50 V DC
Current drawn: one M-Bus load
Primary or secondary addressing
Baud rate 300 or 2400 baud (automatic baud rate detection)
Protocol: M-Bus
max. reading interval at battery supply: every 3 minutes*
at mains supply:
unlimited
* If the meter is read more than every 3 minutes, the meter recognizes and doesn´t allow it. The
display will show then the error code E - 5. Also this error code will be shown in the header of the M-
Bus telegram (to frequent reading via M-Bus).
Fig. H
M-Bus module