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66
Smartcat (BL2100)
A.2 Conformal Coating
The areas around the crystal oscillator and the battery backup circuit on the BL2100 mod-
ule have had the Dow Corning silicone-based 1-2620 conformal coating applied. The con-
formally coated areas are shown in Figure A-4. The conformal coating protects these
high-impedance circuits from the effects of moisture and contaminants over time.
Figure A-4. BL2100 Areas Receiving Conformal Coating
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 Rabbit Technical Note
TN303,
Conformal Coatings
, in the online documentation set.
Conformally
coated area
TVS1
L1
D1
C5
D3
C8
C9
R160
C101
RP9
U16
U17
R151
C95
R158
R159
C100
C25
C21
C22
R187
R134
TP4
R135
C86
U13
BT1
C48
C52
C46
C44
C43
C13
RP4
RP3
RP15
RP14
C87
C89
R140 U12
R133
C85
R132
C88
R139
C51
C50
C49
C24
C92
C90
R148
R143
C93
C94
C98
C99
C103
C104
R174
C111
R172
C106
R165
R161
R156
R154
R149
R147
C102
C97
C96
R152
C91
U18
DI08 DI09 DI10 DI11 DI12 DI13 DI14 DI15 RS485 RS485 PE5-INT GND DIO23 DIO22 DIO21 DIO20 DIO19 DIO18 DIO17 DIO16 DIO15 DIO14 DIO13 DIO12 DIO11 DIO10
Q26
D14
C74
R103
R99
C72
Q55
Q43
Q47
Q51
R95
R138
JP1
U7
R82
C61
Q30
Q34
R90
R136
R106
R81
C17
R96
Q52
Q48
J17
D18
C82
RP7
Q44
Q56
C75
D15
Q71
R104
R100
C69
Q67
Q63
Q59
Q4
Q5
RP5
RP6
U4
C14
J16
R1
1
R9
R10
R119
R186
R142
R8
R7
JP6
J14
Q78
J22
J20
J4
D6
Q23
RP11
C58
R78
Q1
1
R74
Q15
C54
Q19 R70
C15
U5
U10
C118
Q21
Q17
R72
C56
Q32
Q36
R84
C63
R88
R92
Q28
Q40
C67
D11
C60
D8
Q25
Q13
R80
R76
D9
C65
R86
Q38
U20
C113
C1
10
C27
R175
C114
R179
R178
R177
C115
R180
R173
C112
R181
Q74
Q75
R176
C12
C6
C7
C1
1
U1
J21
U2
J7
+K2 +K1 DO09 DO08 DO07 DO06 DO05 DO04 DO03 DO02 DO01 DO00 GND +RAW
232CR 232CT
232DR 232DT DIO0 DIO1 DIO2 DIO3 DIO4 DIO5 DIO6 DIO7
ADCIN10
ADCIN9
ADCIN8
ADCIN7
ADCIN6
ADCIN5
DAC03 DAC02
AGND DAC01
DAC02
ADCIN4
ADCIN3
ADCIN2
ADCIN1
ADCIN0
J1
J1
1
R162
R155
R153
R145
R146
C26
Battery
J1
R2
C3
D2 R7
C27
R8
R36
RT
1
R41
R37
R38
D1
R39
Y2
C2
C1
U8
U7
U3
U6
C7
GND
GND
EGND
DS2
LNK
ACT
DS1
R19
Q3
Q4
Q5
Q2
R1
Y1
C4 C17
C8
R9
R13
R11
U1
BT1
R
1
5
C12
R17
R20
C13
Y3
R16
R22
R21
C14
R
18
C25
C28
D3
J2
JP4
JP3
JP1
JP6
C30
JP2
JP5
C29
U2
Flas
h
EP
ROM
Содержание BL2100
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