Safety Facts To Read Before Proceeding - Allen-Bradley 1395 Troubleshooting Manual

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Safety Facts to Read Before
Proceeding
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ATTENTION: Severe injury or death can result from electrical
!
shock, burn, or unintended actuation of controlled equipment.
Hazardous voltages may exist in the cabinet even with the circuit
breaker in the off position. Recommended practice is to
disconnect and lock out control equipment from power sources,
and discharge stored energy in capacitors, if present. If it is
necessary to work in the vicinity of energized equipment, the
safety related work practices of NFPA 70E, Electrical Safety
Requirements for Employee Workplaces, must be followed. DO
NOT work alone on energized equipment.
ATTENTION: Potentially fatal voltages may result from
!
improper usage of oscilloscope and other test equipment. The
oscilloscope chassis may be at a potentially fatal voltage if not
properly grounded. If an oscilloscope is used to measure high
voltage waveforms, use only a dual channel oscilloscope in the
differential mode with X 100 probes. It is recommended that the
oscilloscope be used in the A minus B Quasi-differential mode
with the oscilloscope chassis correctly grounded to an earth
ground. Refer to equipment safety instructions for all test
equipment before using with the 1395.
ATTENTION: The CMOS devices used on the control circuit
!
boards can be destroyed or damaged by static charges. If
personnel will be working near static sensitive devices, they must
be appropriately grounded. If you are not familiar with static
control procedures, reference A-B publication 8000-4.5.2
Guarding Against Electrostatic Damage or any other applicable
ESD Protection Handbook.
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Understanding the Basic Principles 1-3