User Manual
Safety, EMC, EMF, ESD Norms and Equipment Label-
9500 MPR Rel. 3.1
3DB18809AAAA Issue 140/980
1.6 Equipment protection against electrostatic discharges
Before removing the ESD protections from the monitors, connectors etc., observe the precautionary mea-
sures stated. Make sure that the ESD protections have been replaced and after having terminated the
maintenance and monitoring operations.
Most electronic devices are sensitive to electrostatic discharges, to this concern the following warning
labels have been affixed:
Observe the precautionary measures stated when having to touch the electronic parts during the instal-
lation/maintenance phases.
Workers are supplied with anti static protection devices consisting of:
– an elasticized band worn around the wrist
– a coiled cord connected to the elasticized band and to the stud on the subrack
1.7 Cautions to avoid equipment damage
a. Anti static protection device kit
Whenever is necessary to handle spare parts and cards out of their own box, this kit (Illustration
below) must be always warn and its termination must be connected to a grounded structure, to avoid
the possible damage of the electronic devices for electrostatic discharges.
Anti static protection device kit
b. Screw fixing
In normal operation conditions, all screws (for unit box closing, cable fixing, etc.) must be always
tightened to avoid item detachment and to ensure the equipment EMI-EMC performance.
The screw tightening torque must be:
2.8 kg x cm (0.28 Newton x m) ±10 %
2.4317 in lb (0.2026 ft lb) ±10 %
Exceeding this value may result in screw breaking.
c. MSS-ODU cable disconnection / connection
Before to disconnect or connect the MSS-ODU cable (at MSS or ODU side) switch off the corre-
sponding MSS Unit.
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