Power Supply, Grounding And Shielding - Honeywell CENTRA LINE WEB-HMI Series User Manual

USER'S MANUAL FOR HTML5 PANELS WEB-HMI CAPACITIVE TOUCH SCREEN
EN2Z-1070GE51 R0920

POWER SUPPLY, GROUNDING AND SHIELDING

The power supply terminal block is shown in the figure below.
Figure 7. Power supply terminal block
3 conductor 1.5 mm² wire size minimum, minimum temperature conductor rating
105°C.
NOTE: Ensure that the power supply has enough power capacity for the operation
of the equipment.
The unit must always be grounded to earth with 1.5 mm² wire size minimum.
Grounding helps limit the effects of noise due to electromagnetic interference on the
control system.
Earth connection will have to be done using either the screw or the faston terminal
located near the power supply terminal block. A label helps identify the ground
connection.
Also connect to ground the terminal 3 on the power supply terminal block.
The power supply circuit may be floating or grounded. In the latter case, connect to
ground the power source common as shown in figure (see below) with a dashed
line.
When using the floating power scheme, note that the panes internally connects the
power common to ground with a 1 MΩ resistor in parallel with a 4.7 nF capacitor.
The power supply must have double or reinforced insulation. The suggested wiring
for the power supply is shown below.
Figure 8. Power supply, grounding and shielding (example)
All the electronic devices in the control system must be properly grounded.
Grounding must be performed according to applicable regulations.
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