Operating instructions, Quick installation
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). See next page.
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 230/380 V, 50/60 Hz
power cables. By cables with other frequencies or high power, an even wider distance
is preferable.
4-wire connection should 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 the 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 terminal 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 are provided.
18
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