Rockwell Automation 1395 Multi-Comm Hardware/Software - Manual (Page 94)

Chapter 7
Periodic Maintenance
7–2
Periodic Inspection – Industrial control equipment should be inspected
periodically. Inspection intervals should be based on environmental and
operating conditions, and adjusted as indicated by experience. An initial
inspection within 3 to 4 months after installation is suggested. Applicable
parts of the following guidelines should be used:
Contamination – If inspection reveals that dust, dirt, moisture or other
contamination has reached the control equipment or MCA board, 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”.
! CAUTION: 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 maintanance on the 1395
Drive and the Multi-Communication 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.