Siemens SIPLUS HCS Series Operating Instructions Manual page 156

Io systems for heating elements, heating control system
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Servicing and maintenance
12.3 Fuse replacement
Position of fuses on the fuse board
The example in the following figure shows the arrangement of the fuses for the POM4320.
Figure 12-2
The assignment of the fuses is shown in the block diagram for the interconnection used. The
fuses are marked on the printed circuit board.
Checking/replacing fuses
NOTICE
Electronic components are fitted to the rear of the board. When replacing fuses, ensure that
these components are not damaged.
1. Check for ruptured or defective fuses (refer to fault information in the section Fault
reporting through diagnostics data (Page 146))
2. Remove the defective fuse with a suitable tool (e.g. flat-nose pliers).
3. Insert the new fuse in the fuse holder.
154
POM4320 position of fuses on the fuse board
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005

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