Technical data

CONTROL PANEL ETV 1961
Page 16 08.07.2014
DIAS bus with C-DIAS modules
To ensure a good bus connection, several wiring guidelines must be followed:
 It is important to ensure the cables used are designed for the data transfer speed.
Data cables (10, 2 x 2 wire TWISTED PAIR, shielded)
i.e.: LAPPKABEL / UNITRONIC-BUSLEITUNG FD P LD
 Due to the internal resistance of the module, the cable impedance should be 100
Ohms.
 For twisted-pair cables, caution must be taken to ensure that the correct pair are
connected with one another:
2x2 pair cables: Pair 1 MBUS+, MBUS-
Pair 2 SBUS+, SBUS-
 The shielding must be connected to GND over the widest surface and shortest route
possible at both ends
 To connect the individual wires to the connector, the insulation must be removed and
the exposed shielding shifted to the side. Only as much insulation as required should
be removed.
 It is important to ensure that the send and receive modules are connected to the
same GND potential.
The maximum length allowed for twisted-pair cables 20 M (when using the UNITRONIC
BUS cable FD P LD / Company LAPPKABEL)
La longueur maximale totale d'un câble à paire torsadée est de 20 m (lors de l'utilisation
UNITRONIC BUS FD P LD / Fa. LAPPKABEL).
DIAS bus with DIAS modules
The terminal can also be connected to a DIAS module. However, the DIAS modules re-
quire a power supply (a DPS 001, for example) as well as an adapter module for connect
the twisted-pair cable to the ribbon cable connector (i.e.: DKO 012 /013).