Communication
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9
Communication
Electronic unit interfaces
The meter is equipped with an optical interface with M-Bus protocol as stand-
ard.
One of the following options can be ordered for remote readout.
M-Bus
Standard, protocol
EN 1434-3; EN 13757-2,
EN 13757-3
Galvanic isolation (between meter and
module)
yes
Polarity
any
Voltage
max. 50 V DC
Current
1.3 M-Bus loads
Addressing
primary or secondary
Baud rate
300, 2400 baud
Technical document
TKB 3427
Connection
cable 1.5 m pre-assembled: PVC,
LIYY 2 x 0.25 mm
2
tin-coated, ex-
ternal diameter 3.6 mm
Note:
When reading via M-Bus, the permissible average reading
frequency must not be exceeded (1 × every 3 h at 2400 baud,
1 × every 24 h at 300 baud). A read-out with a higher frequency is
not permitted and it could lead to incorrect functioning of the meter.
Pulse output
Type
open collector
Galvanic isolation (between meter
and module)
yes
Polarity
observe
Voltage
max. 30 V
Current
max. 30 mA
Dielectric strength
500 V
eff
against ground
Classification
OB (acc. to EN 1434-2)
Voltage drop
ca. 1.3 V at 20 mA
Connection
cable 1.5 m pre-assembled: PVC,
LIYY 2 x 0.25 mm
2
tin-coated, external
diameter 3.6 mm)
