BECKHOFF EK1914 - Manual (Page 43)

Operation
EK1914 41
4.5 Maintenance
The TwinSAFE Bus Couplers are maintenance-free!
WARNING
Observe the specified environmental conditions!
Please ensure that the TwinSAFE Bus Couplers are only stored and operated under
the specified conditions (see technical data).
If the Bus Coupler is operated outside the permitted temperature range it will switch to Global Fault state.
4.5.1 Cleaning
Protect the TwinSAFE Bus Couplers from unacceptable soling during operation and storage!
If the TwinSAFE Bus Couplers were subjected to unacceptable soiling they may no longer be operated!
WARNING
Have soiled Bus Couplers checked!
Cleaning of the TwinSAFE Bus Coupler by the user is not permitted!
Please send soiled Bus Couplers to the manufacturer for inspection and cleaning!
4.5.2 Service life
The TwinSAFE Bus Couplers 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 Bus Couplers 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 27 14 01 00
Calendar week: 27
Year: 2014
Software version: 01
Hardware version: 00
In addition the TwinSAFE Bus Couplers bear a unique serial number.