5 maintenance – BECKHOFF EL1904 User Manual
Page 40
Operation
38
EL1904
4.5 Maintenance
The TwinSAFE terminals are maintenance-free!
WARNING
Observe the specified environmental conditions!
Please ensure that the TwinSAFE terminals are only stored and operated under the
specified conditions (see technical data).
If the terminal is operated outside the permitted temperature range it will switch to Global Fault state.
4.5.1 Cleaning
Protect the TwinSAFE terminal from unacceptable soling during operation and storage!
If the TwinSAFE terminals were subjected to unacceptable soiling they may no longer be operated!
WARNING
Have soiled terminals checked!
Cleaning of the TwinSAFE terminal by the user is not permitted!
Please send soiled terminals to the manufacturer for inspection and cleaning!
4.5.2 Service
life
The TwinSAFE terminals are designed for a service life of 20 years.
Due to the high diagnostic coverage within the lifecycle no special proof tests are required.
The TwinSAFE terminals bear a date code, which is composed as follows:
Date code: CW YY SW HW
Legend:
CW:
Calendar week of manufacture
YY:
Year of manufacture
SW: Software
version
HW: Hardware
version
Example: Date code
17 11 05 00
Calendar week:
17
Year:
2011
Software version:
05
Hardware version:
00
In addition the TwinSAFE terminals bear a unique serial number.