Maintenance
SM/FEX300/FEX500/FM/CSA-EN FEX300, FEX500 EN - 37
8 Maintenance
8.1 General information
Repair and maintenance activities may only be performed by authorized customer service
personnel.
When replacing or repairing individual components, original spare parts must be used.
DANGER - Risk of explosion!
When the housing cover is open, the explosion protection is suspended.
Before opening the housing switch off the power to all connection lines and wait at least 20
minutes.
WARNING – Electrical voltage risk!
When the housing is open, EMC protection is impaired and protection against contact is
suspended.
Before opening the housing, switch off power to all connecting cables for the device.
NOTICE - Potential damage to parts
The electronic components of the printed circuit board can be damaged by static electricity
(observe ESD guidelines).
Make sure that the static electricity in your body is discharged before touching electronic
components.
IMPORTANT (NOTE)
Users must also observe the information in the operating and commissioning instruction for
the device.
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