BL4S200 User’s Manual
174
A.2 Conformal Coating
The areas around the crystal oscillator and the battery backup circuit on the BL4S200
modules based on the Rabbit 4000 microprocessor have had the Dow Corning silicone-
based 1-2620 conformal coating applied. The conformal coating protects these high-
impedance circuits from the effects of moisture and contaminants over time. Refer to the
individual RabbitCore module’s User’s Manual for additional information on where the
conformal coating was applied.
Any components in the conformally coated area may be replaced using standard soldering
procedures for surface-mounted components. A new conformal coating should then be
applied to offer continuing protection against the effects of moisture and contaminants.
NOTE:
For more information on conformal coatings, refer to Technical Note 303,
Conformal Coatings
.
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