Yaskawa 120 Series I/O Modules - Manual (Page 283)

7 Maintenance
7.1.2 Built-in Fuses
7-4
3) DC 16-point Output Module
a) The fuse inside a DC 16-point Output Module is not to protect the output circuit. The
fuse prevents the Module from damage that may occur in the following cases:
• External causes: For example, when over-voltage is applied to the power termi-
nals for driving load of the DC 16-point Output Module.
• Internal causes: For example, when foreign matter such as chips are present in
the DC 16-point Output Module, and thereby short-circuiting the
internal circuits.
b) When the built-in fuses are blown out, the indicator lamp “F” of the DC 16-point Out-
put Module is lit. If the fuses are blown out, eliminate the cause and replace the
fuse.
The fuses built in the DC 16-point Output Modules can be replaced by users.
4) DC 32-point Output Modules
Do not replace the built-in fuses of the DC 32-point Output Modules.
If the built-in fuses are replaced by anyone other than a Yaskawa-approved
technician, a failure or malfunction may occur in the DC 32-point Output Mod-
ules, and the guarantee is void.
a) The fuse inside a DC 32-point Output Module is not to protect the output circuit. The
fuse prevents the Module from damage that may occur in the following cases:
• External causes: For example, when over-voltage is applied to the power termi-
nals for driving load of the DC 32-point Output Module.
• Internal causes: For example, when foreign matter such as chips are present in
the DC 32-point Output Module, and thereby short-circuiting the
internal circuits.
b) When the built-in fuses are blown out, the indicator lamp “F” of the DC 32-point Out-
put Module is lit. If the fuses are blown out, eliminate the cause and replace the
Module with a spare DC 32-point Output Module.
INFO
CAUTION