Yaskawa 120 Series I/O Modules - Manual (Page 284)

7.1 Built-in Fuses
7-5
7
5) DC 64-point Output Modules
Do not replace the built-in fuses of the DC 64-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 64-point Output Mod-
ules, and the guarantee is void.
a) The fuse inside a DC 64-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 64-point Output Module.
• Internal causes: For example, when foreign matter such as chips are present in
the DC 64-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 64-point Out-
put Module is lit. If the fuses are blown out, eliminate the cause and replace the
Module with a spare DC 64-point Output Module.
7.1.3 Replacement of Built-in Fuses
1) I/O Modules whose Built-in Fuses can be Replaced by Users
The fuses of the following Output Modules can be replaced by users.
• 12/24-VDC 16-point Output Module (sinking output):
Model No. JAMSC-120DDO34310
• 12/24-VDC 16-point Output Module (sourcing output):
Model No. JAMSC-120DDO34320
2) Replacement Procedure
Use the following procedure to replace the built-in fuses of DC 16-point Modules.
(1) Turn OFF the DC power to the Module for driving loads.
(2) Remove the terminal block from the Module. For details, refer to 6.1.2 (3)
Removing the Terminal Block from the Module.
(3) Remove the Module from the Mounting Base. For details, refer to 6.1.2 (4)
Removing Modules.
(4) Remove the built-in fuse from the Module.
(5) Replace a spare fuse on the Module.
(6) Eliminate the cause of the fuse blowout and install the Module on the Mounting
Base.
(7) Install the terminal block on the Module.
CAUTION