Siemens S7-300 Installation Manual page 157

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the digital outputs of the following digital output modules are short-circuit protected
by individual fusing of the channel groups:
• Digit output module SM 322; DO 16 × A 120 V
• Digit output module SM 322; DO 8 × A 120 230 V
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Eliminate the causes of fuse tripping.
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If replacement is required, you can use the following fuses:
• 8 A, 250 V fuse
Wickmann 19 194-8 A
–
Schurter SP001.013
–
Littlefuse 217.008
–
• Fuse holder
Wickmann 19 653
–
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Improper handling of digital output modules could result in injury or damage
to property.
Under the covers on the right side of the module, there are dangerous
voltages > 25 VAC or > 60 VDC.
Before opening these covers, ensure that the front connector of the module
is removed or that the module is disconnected from the supply voltage.
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Improper handling of front connectors could result in injury or damage to
property.
When you remove the front connector during operation, beware of
dangerous live voltage > 25 VAC or > 60 VDC across the pins.
If the front connector is wired to such voltages, hot swapping of modules
must always be carried out by skilled or instructed electrical staff, in order to
avoid unintentional contact with the module pins.
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
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