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Pc-board SF37
Since 07/15/2020 (from serial number 4xxx-3029-xxxx-x), the SF37 is used as a standard pc-board used for water
cooling. The threshold value for detection of water owing / water not owing has been raised by 10 Kelvin. Fur-
thermore, the fuse SI2 has been changed: 1.25A (instead of 1A) because at the same of the switch to SF37, the
autotransformer was changed to a stronger version.
Schematic pc-board SF37
400
230
0
X2
X3
400V
400V
RE1
X10-6
X10-2
X10-3
X10-5
X10-1
Si2
1.25A
Si1
2.5A
X4X5
P
M
X9-2
X9-1
+24V
RE1
X7-4
X7-3
X6-1
X6-2
SF37
+15V
X8-1
X8-3
1.25A
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