Connecting The Modules Electrically - Aventics DDL Instrucciones De Servicio

AVENTICS | DDL | R499050020–BDL–001–AD
6.3

Connecting the modules electrically

Applied voltage
Danger of injury from electric shocks.
O
Make sure the relevant system component is not under
voltage or pressure before electrically connecting
modules to the valve terminal.
O
Do not insert or disconnect plug connectors under load.
Faulty wiring
Faulty wiring can lead to malfunctions as well as damage to
the DDL line. This is particularly the case if 24 V voltage is
present on the DDL-H and DDL-L signal lines or if the supply
lines have been exchanged.
O
Thus, use pre-assembled plug connections and cables to
connect the modules. Only a cable that meets the
fieldbus specifications as well as the connection speed
and length requirements should be used.
O
In order to assure both the protection class and the
required strain relief, the cable and plug assembly
should be done professionally.
Current flow in shield due to differences in potential
Compensating currents caused by differences in potential
must not flow through the shield of the DDL cable, as this will
cancel the shielding, which could damage the line and
connected bus coupler.
O
If necessary, connect the grounding points for the system
using a separate line.
CAUTION
NOTICE
NOTICE
77
Assembly