Vishay G4-DT, Техническое руководство, Страница: 25 / 174

G4 Multi Channel Force Instrument
2-7
WF IN, WF IN2 and HS WF2
The voltage levels on connectors of I/O modules shall not exceed
hazardous voltage levels of 30 Vrms, 42.4 Vpeak or 60 Vdc under normal
conditions. In wet locations these voltage levels shall not exceed 16 Vrms,
22.6 Vpeak or 35 Vdc.
Transducer inputs
Terminals 17 – 23 (channel 1),
10 – 16 (channel 2).
Transducer connection should be handled
with great care to achieve good measuring
data. Transducer integrated cables may not
be shortened.
NOTE! Transducer cables must be routed at
least 200 mm away from 230/400 V, 50/60 Hz
power cables.
By cables with other frequencies or high power,
an even wider distance is preferable.
4-wire connection can be used if the
transducer integrated cable is long enough to
be connected directly to a transducer input. At
4-wire connection, some terminals must be
interconnected as shown in figure on next
page.
6 -wire connection should be used if the
integrated cable must be lengthened or if several
transducers should be connected to one
transducer input.
The channel 1 cable shield must be connected
to terminal 21 and the channel 2 cable shield
must be connected to terminal 14.
In WF IN and WF IN2 the shield terminals are
internally connected to the G4 housing, which is
internally connected to earth via the power
supply connector pin 3 (shield). The shield shall
not be connected at any other point.
In HS WF2 the transducer input channels are
separately insulated by operational insulation
and the shields can be connected to the most
convenient ground/earth point. This can be the
junction box when using multiple transducers or
at the barrier ground when using Ex zener
barriers.
In the junction box SL-4 from Nobel Weighing
Systems, see figure, all necessary terminals and
interconnections are provided.