Siemens SIMATIC IPC347E, Руководство по эксплуатации

Страница: 50 / 148

Device maintenance
6.2 Recycling and disposal
SIMATIC IPC347E
50
Operating Instructions, 09/2018, A5E41134132-AE
CAUTION
Damage to ESD from touch
Electrostatic sensitive devices, ESD, can be destroyed by voltages which are far below the
human perception limit. If you touch a component or electrical connections of a module
without discharging any electrostatic energy, these voltages may arise.
The damage to a module by an overvoltage can often not be immediately detected and only
becomes evident after an extended period of operation. The consequences are incalculable
and range from unforeseeable malfunctions to a total failure of the machine or system.
Strictly follow the guidelines mentioned below when handling modules which are sensitive
to ESD:
• Disconnect the power supply before you install or remove modules which are sensitive
to ESD.
•
Pay attention to good grounding:
– When handling electrostatical sensitive devices, make sure that persons, the
workstation and devices, tools and packaging used are properly grounded. This way
you avoid static discharge.
•
Avoid direct contact:
– As a general rule, do not touch electrostatic sensitive devices, except in the case of
unavoidable maintenance work.
– Hold the modules at their edge so that you do not touch the connector pins or
conductor paths. This way, the discharge energy does not reach and damage the
sensitive components.
– Discharge your body electrostatically before you take a measurement at a module.
Do so by touching grounded metallic parts. Always use grounded measuring
instruments.
Tools
Tools to open the device, see section Opening the device (Page 41). You can make repairs
on the device with the following tool:
● PH2 screwdriver for protective conductor connection and enclosure
6.2 Recycling and disposal
The devices described in these operating instructions can be recycled thanks to their low
level of pollutants. Contact a certified disposal service company for environmentally sound
recycling and disposal of your old devices.