CONTROL PANEL
ETV 1991
21.06.2018
Page 17
DIAS bus with C-DIAS modules
To ensure a good bus connection, several wiring guidelines must be followed:
•
The cable used must be designed for the data transfer speed:
Data cable (10 MBit, 2 x 2 wire TWISTED PAIR, shielded)
E.g.: LAPPKABEL / UNITRONIC-BUSLEITUNG FD P LD
•
Because of the internal resistance of the module, the cable impedance should be
100 Ohms.
•
With twisted-pair cables, ensure that the correct pairs are connected to one another:
2x2 pair cables:
Pair 1
MBUS+, MBUS-
Pair 2
SBUS+, SBUS-
•
The shielding must be connected over a large area and the shortest possible route.
•
To connect the individual wires to the connector, the insulation must be removed and
the exposed shielding shifted to the side. Only remove as much of the insulation and
shielding as needed.
•
The send and receive modules must have the same GND potential.
The maximum length allowed for twisted-pair cables 20 m (when using the UNITRONIC
bus cable FD P LD / Fa.LAPPKABEL)
DIAS bus with DIAS modules
It is also possible to connect the terminal to a DIAS module. However, the DIAS modules
require a power supply (a DPS 001, for example) as well as an adapter module for con-
nect the twisted-pair cable to the ribbon cable connector (i.e.: DKO 012 /013).
