5Kmstrup A/S • 5512853_C1_GB_01.2017
M-Bus Mster MultiPort 250D
2 Functionlity
Kmstrup M-Bus Mster MultiPort 250D is n M-Bus mster designed for the connection of up to 250 meters with
M-Bus interfce. The cble length of mster cn be up to 2800 m depending on cble type.
The mster supports primry, secondry nd enhnced secondry ddressing. Enhnced secondry ddressing is
supported when the mster is used s level converter, not when reding vi the disply.
All inputs re glvniclly seprted from the M-Bus network.
When designing the mster, it hs been considered importnt tht instlltion nd nlysis work cn be effected
directly from the mster without hving to connect PC with dedicted softwre.
Configured s mster, MultiPort 250D is operted vi its disply nd the six front keys.
The disply hs been designed with user-friendly menu structure, which mkes it simple to perform scnning,
reding nd nlysis of the M-Bus network. Furthermore, the disply currently provides informtion on network sttus
such s current communiction nd number of connected meters (Unit Lods).
Configured s level converter, one or severl of the integrted communiction ports re connected to reding
system, control unit or similr. Communiction is controlled from the connected units.
MultiPort 250D cn be ccessed from ll vilble communiction ports. The integrl port controller prevents collision
in cse of simultneous communiction through more thn one port.
When the port controller detects communiction on one port, communiction on other ports becomes impossible.
When communiction on one port is finished, ll ports re open to communiction.
The repeter function mkes it possible to extend the size of the M-Bus network both s to number of meters nd totl
cble length. If one mster nd four repeters re instlled in network, the totl cble length cn be extended to
pprox. 14 km, nd up to 1250 meters cn be connected.
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