Exor eSMART07M - Power Supply, Grounding and Shielding

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MANUGENESMARTxx - Version 2.01
© 2018 EXOR International S.p.A. - Subject to change without notice
6 Power Supply, Grounding and Shielding
The power supply terminal block is shown in the gure below.
Fig. 6.2
Fig. 6.1
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 1.5mmq 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 oating or grounded. In the latter case, connect to ground the power
source common as shown in gure (see below) with a dashed line.
When using the oating power scheme, note that the HMI devices internally connects the power com-
mon to ground with a 1MΩ resistor in parallel with a 4,7nF capacitor.
The power supply must have double or reinforced insulation.
The suggested wiring for the power supply is shown in gure.
All the electronic devices in the control system must be properly grounded. Grounding must be performed
according to applicable regulations.
DC Power Connector - AWG24 wire size - R/C Terminal Blocks (XCFR2), Female pitch 5.08mm,
torque 4.5 lb-in.
3 conductor 1,5mmq wire size minimum, minimum temperature conductor rating 105°C.