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Instruction for use | Supercal 739
11.4 Powered remote M-Bus
The powered remote M-Bus communication interface is a serial interface which permits com-
munication between different M-Bus devices via a central M-Bus station. It must be specified
when ordering. The powered remote M-Bus module will hence be installed and configured in
the factory.
By default, the primary address will be configured with the address 0 and the secondary address
will correspond to the serial number of the Supercal 739. To change the value of the secondary
address, you must use the Prog7x9 software or send M-Bus specific orders. The secondary
address corresponds to the identification field ID. The primary address is displayed in the Service
menu with the indication [Addr:].
Technical data for the M-bus communication system:
M-Bus protocol compliant with standard EN 1434-3; free potential interfacing without polarity
(the voltage measured on the last device must exceed 36VDC); transmission speed 300/2400
Baud; variable data structure. A M-bus device is seen as two M-Bus charges by the Master.
Type of cable recommended: telephone cable JYStY N*2*0.8 mm2
12. Security seals
As sealing varies from country to country, local regulations must be followed. To protect the
system against all unauthorised manipulations, the energy meter, the connection screws, the
temperature sensors and the sensor pockets must all be sealed. The seals may only be removed
by authorised persons. In the event of failure to comply with this instruction, the guarantee
obligation will lapse. It is important for the wire seal to be as short as possible so that it is
slightly taut. This is the only way of preventing malicious interference.
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Seals installed in the factory on flow meter and temperature sensor of the Supercal
739
Seal installed in the factory on the calculator
For the Supercal 739 with coaxial multi jet meter, the detector support fitted to
the flow sensor can’t be removed A factory seal will be applied to the temperature
sensor, mounted in the capsule with the threaded union G2’’.
To mount the temperature sensor on the EAS base of the flow sensor with M77x1.5
connection the Sontex seal supplied with the meter must be used (S written in black
on a grey background).
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