Interface description – Siemens TC35 User Manual
Page 15
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13
Interface description
Polarity reversal protection
Polarity reversal protection is implemented
by means of a power diode. The diode has a
reverse voltage of 400V.
Overvoltage protection
Overvoltages are suppressed by a Zener
diode after the polarity reversal protection
diode.
Fuses
A permanently installed, non-replaceable
fuse in the TC35 Terminal ensures electrical
safety in the event of faults. Connect a fast
1.25A fuse to the supply line of the positive
supply voltage for general protection of the
Terminal, see "Safety and installation
information" on page9.
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