janitza UMG 604-PRO, User Manual And Technical Data

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UMG 604-PRO
www.janitza.de
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7. Interfaces
The device has the following interfaces:
• RS232
• RS485
• Ethernet
• Profibus (optional)
All interfaces can be used simultaneously.
7. 1 Shielding
A twisted, shielded cable should be used
for connections via the RS232 and RS485
interfaces.
Earth the shields of all cables that lead to the
cabinet and at the cabinet entry.
Connect the screens over a generous area
and in a manner that will conduct well,
to a low-noise earth.
Gather the cables mechanically above the
earthing clamp in order to avoid damage due
to cable movements.
Use suitable cable glands to feed the cables
into the cabinet, for example, armoured
conduit couplings.
c c
WARNING!
Risk of injury due
to electric voltage!
RS232, RS485 and the temperature
measurement input are not galvanically
separated from each other. The Profibus
and Ethernet are functionally insulated from
each other and the remaining interfaces.
Therefore, be aware that hazardous
voltages on the inputs that are not
galvanically separated may have effects
on the other connections.
Fig. Shielding procedure at cabinet entry.
Cable
Strain relief
Screen braid of the cable
Earthing clamp
Noiseless ground