Rockwell Automation 1395 ControlNet Communication Board - Manual (Page 72)

7–2 Periodic Maintenance
Publication 1395.5.37 – March, 1999
the cause must be eliminated. This could indicate an incorrect or
ineffective enclosure, unsealed enclosure openings (conduit or other)
or incorrect operating procedures. Dirty, wet or contaminated parts
must be replaced unless they can be cleaned effectively by vacuuming
or wiping.
Solid-State Devices – Solid-state devices require little more than a
periodic visual inspection. Printed circuit boards should be inspected
to determine whether all ribbon cables are properly seated in their
connectors. Board locking tabs should also be in place. Necessary
replacements should be made only at the PC board or plug-in
component level. Solvents should not be used on printed circuit
boards. Where blowers are used, air filters if supplied should be
cleaned or changed periodically depending on the specific
environmental conditions encountered. For additional information see
NEMA Standards Publication No. ICS 1.1–1984 entitled: “Safety
Guidelines for the Application, Installation and Maintenance of
Solid-State Controls”.
!
ATTENTION: This drive contains ESD (Electrostatic
Discharge) sensitive parts and assemblies. Static control
precautions are required when installing, testing, servicing or
repairing this assembly. Component damage may result if ESD
control procedures are not followed. 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.
Static Sensitive Items – While performing maintenance on the 1395
Drive and the ControlNet Adapter Board, special precautions must be
observed in handling or touching certain static sensitive components in
the cabinet. All circuit cards and SCR’s in the Drive can be damaged
by Electro-Static Discharge. If personnel will make contact with an
ESD sensitive component during maintenance, they must be grounded.
Grounding should be accomplished with a wrist strap which is
connected to an approved ground.
Tests & Records Final Check Out – After maintenance or repair of industrial controls,
always test the control system for proper functioning under controlled
conditions that avoid hazards in the event of a control malfunction.
“Keep Good Maintenance Records” – This rule will be most helpful
in locating possible intermitttent problems by pointing to a particular
area of recurring trouble within the overall system. Further, good
maintenance records will help reduce major costly shutdowns by
demanding the use of proper test equipment and an appropriate
inventory of spare parts. For additional information see NFPA 70 B,
RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT
MAINTENANCE, published by the National Fire Protection
Association.