Sensor Wiring
Modline 5
79
4.11
System Grounding and Shielding
4.11.1
Terminal Strip Plate Diagram
Figure 72: Terminal Strip Plate
1)
The Sensor mounting surface should be at earth ground potential
. Provide electrical
insulation between the Sensor and mounting surface if the surface is not at ground
potential. Use non-conductive hardware for mounting. Mounting surfaces not at
ground potential could be hazardous for personnel operating and maintaining the
Sensor.
2)
Insure earth ground
is properly connected to the Terminal Strip Plate as previously
instructed in this Section.
3)
For the Terminal Strip Plate: Connect a regulated power supply.
4)
If the Terminal Strip Plate is used, the interconnecting cable shield is connected to
ground with the shield clamp on the plate.
Twisted pair shielded computer cable is required for all connections.
If the Terminal Strip Plate is used, cable shields are connected to ground with ground
clamps on the plate.
This manual specifies the shields of cables connecting between the Terminal Strip
Plate and system devices be connected to ground only at the plate. The recommended
shield connections are shown in the drawing below. This recommendation is to
prevent ground loops due to the difference in ground potential between locations of
components and provide adequate shielding of cables.
Some devices call for connecting the shield to ground at the device input. If ground
loops develop with this connection, it may be necessary to experiment with shield
Mounting surface not
at ground potential
Insulation
1) Ground
Cable clamp (3 Places)
Interconnecting cable
4) Shield to clamp
2) Ground lead
Terminal Strip Plate
11) Place Terminal Stripe Plate in metal enclosure
for protection from ESD (electrostatic discharge)
4) Grounded shield
4) Grounded shield
4) Grounded shield
4) Grounded shield
Analog
output
mA IN
EMIS/E-SLOPE
Peak Picker/Track &
Hold Reset switch
24 VDC
Power supply 3)
Mounting surface at
ground potential
1) Ground
