Beckhoff CP22 Series, Руководство пользователя, Страница: 39 / 53

Maintenance
CP22xx 39 Version: 2.0
• Battery and battery pack
• Fan
The following table provides recommendations for the regular, precautionary replacement of the PC
components:
Table 11: Replacement recommendations for PC components
Component Recommendation for replacement intervals (years)
UPS battery pack 5 years
2.5-inch hard disk 5 years or after 20,000 operating hours at more than 40
°C or after 30,000 operating hours at less than 40 °C
3.5-inch hard disk 5 years, irrespective of the operating hours
Fan 7 years
Compact Flash, CFast or SSD 10 years
Motherboard battery 5 years
Beckhoff is excluded from liability in the event of possible damage occurring during maintenance work. In
order to avoid damage caused by electrostatic discharge when replacing device components, protective
measures are recommended. Below are some suggestions.
ESD protection
NOTE
Electrostatic discharge
The replacement of device components without ESD protection can lead to functional impairment and de-
struction of the device.
• If possible, apply ESD protection measures during maintenance work.
When working on electronic devices, there is a risk of damage due to ESD (electrostatic discharge), which
can impair the function or destroy the device.
Protect the Panel PC and create an ESD-protected environment in which existing electrostatic charges are
safely discharged to ground and charging is prevented.
An ESD-protected environment can best be created by setting up ESD protection zones. The following
measures serve this purpose:
• ESD-compliant floors with sufficient conductivity to the reference potential PE;
• ESD-compatible work surfaces such as tables and shelves;
• Wrist grounding strap, especially for sedentary activities;
• grounded and electrostatically dissipating equipment and operating materials (e.g. tools) within the
ESD protection zone.
If it is not possible to create an ESD protection zone, you can still protect the device against ESD damage.
For example, the following measures can be used:
• Use conductive mats connected to the ground potential as underlays.
• Dissipate possible charges from your own body by touching grounded metal (e.g. control cabinet door).
• Wear a wrist grounding strap.
• Only remove new electronic components from the ESD packaging (tinted plastic bag) after putting on
the wrist grounding strap.
• Do not walk around with electronic components in your hand if they are not in ESD packaging.
Access to exchangeable device components
You can access the storage media (1), the fan cartridges (2) and the battery (3) via the rear side of the Panel
PC. The components are located on the top of the connection block under covers (see Fig. 22). Depending
on the selected display size of your device, the storage media and battery are either located together under
one cover (A) or under separate covers (B). The procedure for replacing the components is the same
regardless of the arrangement on the device (see upcoming chapters).