Videotec ULISSE COMPACT THERMAL - Manual (Page 23)

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nstruc
tions manual
21
7.1.14.2 Line RS485-1 reception, line RS485-
2 repetition
With this type of setting it is possible to connect more
than one device in cascade. The signal is repeated
from every unit, making it possible to markedly
increase total distance.
RS485-1
Max 1200m Max 1200m
RS485-1 RS485-2
Control
Keyboard
Fig. 29
j It only works with mono-directional
protocols.
j This configuration does not allow the
remote updating of the firmware.
7.1.14.3 Two-way RS422 line
This setting allows full duplex communication
according to the RS422 standard.
Line RS485-1 is always in receiving mode (RS422-RX).
Line RS485-2 is always in transmission mode (RS422-
TX).
Max 1200m
RS485-1 RS485-2
Control
Keyboard
Fig. 30
7.1.14 Serial communication lines
(DIP1)
The product is designed with two RS485 serial
communication lines which can have various settings
according to the positions of dip-switches 5 and 6 on
the DIP1 selector.
SERIAL COMMUNICATION LINES (DIP1)
Description SW 1-2-3-4 SW 5 SW 6 SW 7-8 C
onfigur
ation
Serial lines - ON ON - "7.1.14.1 Two-way RS485
TX/RX line", page 21
- OFF ON - "7.1.14.2 Line RS485-1
reception, line RS485-2
repetition", page 21
- ON OFF - "7.1.14.3 Two-way RS422
line", page 21
- OFF OFF - "7.1.14.4 One-way RS485
line", page 22
Tab. 10
7.1.14.1 Two-way RS485 TX/RX line
With this type of setting it is possible to obtain a
bi-directional, half/duplex, communication on the
RS485-1 line.
The RS485-2 serial line is not used.
RS485-1
Max 1200m
TX/RX
Control
keyboard
Fig. 28