ES4455.2 Load Carrier Board - User’s Guide32
Properties and Functions ETAS
If you should decide to replace a fuse yourself, the following warning notice and
the installation instructions in "Removing and installing fuses on the ES4455.2
Load Carrier Board" on page 32 must be observed:
Removing and installing fuses on the ES4455.2 Load Carrier Board
The following instructions are described based on figures of the ES4457.1. They
also apply to the variants ES4450.3, ES4451.4, ES4452.1, ES4453.1 and
ES4458.1 mounted with load modules.
1. Ensure that ESD-compliant conditions exist at your
workplace.
2. Switch off the ES4408.1 Load Chassis and pull the
power plug. Wait at least three minutes until the
ES4455.2 Load Carrier Board has been discharged.
Fire hazard!
Failure to observe the fuse specifications can lead to excess currents,
short circuits and fires.
Use only fuses that meet the specifications in Tab. 2-1 on page 31!
Never bridge defective fuses!
The fuses on the ES4455.2 Load Carrier Board may
be replaced only with the fuses specified in Tab. 2-1.
The assignment is based on Fig. 2-11
Danger from high voltages!
The components, plug connectors and conductor paths of the
ES4455.2 Load Carrier Board and its variants ES4450.3, ES4451.4,
ES4452.1, ES4453.1, ES4457.1 and ES4458.1 may have dangerous
voltages. These voltages can still be present even after the ES4455.2
and its variants ES4450.3, ES4451.4, ES4452.1, ES4453.1, ES4457.1
and ES4458.1 have been removed from the ES4408.1 Load Chassis,
the ES5300.1-A Housing or the ES5300.1-B Housing or if the
ES4408.1 Load Chassis, the ES5300.1-A Housing or the ES5300.1-B
Housing have been switched off.
Make sure that the products are protected from external contact
during operation. Switch off the ES5300.1-A Housing, the ES5300.1-
B Housing or the ES4408.1 Load Chassis and unplug from the mains.
Wait at least three minutes before removing the products.
Failure to do so poses a danger to life and health.
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