Shield voltage
measures the
voltage on the shield
wire relative to V-
Shield Voltage
!
!
!
!
Make sure the Shield and V- are connected to
each other and to earth ground at the power
supply (very important)
Check for shorted or open shield wiring
Check that your shield wire is actually
grounded correctly (it’s so important you check
it twice!)
The NetMeter displays “OL” if the shield is not
connected (or if the voltage is high).
For
shield voltage levels we suggest:
5
SHIELD
13
Important!
Some industrial applications and some end-
users employ different shield connection techniques to
meet specific requirements. In these cases the shield
voiltage will differ from that expected in "typical"
DeviceNet installations.
Semiconductor Fab Applications:
Disregard
or
shield voltage indications if
the shield is intentionally connected differently
than defined in the DeviceNet Specification.
Flat Media Applications:
Disregard
or
shield voltage indications in
flat media applications as flat media has no
shield. NetMeter should always display OL when
connected to a flat media system.
Important!
DeviceNet Flat Media has no shield, and
shield voltage measurements are not relevant.
