Configuration Of The Rs485 Link; Rs485 Link Interface; Polarisation; Matching - MGE UPS Systems SineWave JBUS Manuel D'installation Et D'utilisation

configuration of the RS485 link

RS485 link interface

NB: the micro switches (SA3-X and
SA2-X) are in the open position when
SineWave™ is delivered.

polarisation

Usage and logic require the master
device of the network to polarise the
line (Rp resistances).

matching

Matching (Ra resistances) must be
performed at both ends of the line.
To avoid non-matching of the line when
disconnecting an end device you
should provide one or two matching
caps.
TM
SineWave is a " slave " device.
However its RS485 link interface can
be polarised and matched in all the
chosen connection topologies either via
an external connector or via micro
switches on SineWave's MERY board.
4
RS485 link interface
TD + (A)
TD – (B)
SineWave™ JBUS communication system installation: E-51027160XT/AC
(cont.)
SA3-2
RD + (A')
Ra
SA3-1
SA3-3
RD – (B')
SA2-4
SA2-2
0V
Ra
SA2-1
5V
SA3-4 SA2-3
1
0V
RP
0V
RP 2
5V
Ra
3
4
RP
5
RP
9 pin SUB-D
connector
MGE UPS SYSTEMS
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