System overview
3.2 Features
PN/M-Bus LINK
Operating Instructions, 03/2018, A5E44260928-AA
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3.2
Features
General features
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1 M-Bus connector (3-pin screw-type terminal).
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The device supports baud rates between 300 and 9600 baud.
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Communication with the individual slaves in the M-Bus network can be performed with
different baud rates.
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The PN/M-Bus LINK can be used in the line, star and tree network topologies.
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PN/M-Bus LINK is always the M-Bus master. The M-Bus master reads the measurement
data from the M-Bus slaves and supplies the M-Bus with power.
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You can connect up to 40 M-Bus slaves to the M-Bus network (standard loads with
current consumption < 1.5 mA). If the current consumption of individual M-Bus slaves is
more than a standard load, fewer M-Bus slaves can be connected.
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When an M-Bus slave is in a short-circuit state, the PN/M-Bus LINK can still communicate
with other M-Bus slaves.
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PN/M-Bus LINK supports the "Primary address" and "Secondary address" addressing
modes.
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2 PROFINET interfaces (integrated switch) enable PROFINET line operation according to
Conformance Class B (CC-B).
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PN/M-Bus LINK is configured in the TIA Portal via a GSDML file.
M-Bus features
Implemented M-Bus functions:
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SND_NKE: Establish communication with M-Bus slave
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REQ_UD2: Request data from slave
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SND_UD: Enables addressing over secondary address
