Elo TouchSystems E06G, Руководство по эксплуатации

Страница: 4 / 8

ELOE06GZKE001
4
!!! Be careful of a frequent mistake !!!
The DTE – DCE cable has to be connected 1:1.
ELO E06G transmits RxD and TxD signals. Control signals are not transmitted.
The converter contains local jumpers RTS-CTS and DTR-DST-DCD. Maximum
data rate is 115 200 bps
.
3.2 RS-485 link connection
The DB9M connector is
used to the link connection
Single
DTE can be
connected via bus
(see fig.) with up to 32
partners.
The RS-485 connector description and the internal passive terminator:
Contact 1
2 3 4 5 6 7 8 9
Signal
TAU1 TAU2
TxRx+
RTSpol
GND
TAU3
T TxRx- +Supp
Internal terminator 1k5
Totally correct RS-485
bus handling is shown
in the picture. RS-485
link must be termina-
ted at both ends. The
resistors (called passi-
ve terminators) must
be connected between
A and B wires and
their value must be
100-120
Ω
. These ter-
minators are used for
the
converter
impedan-ce matching,
they
suppress the
undesi-rable echo and