Documentation issue status

Version	Comment
2.4.0	KL2521-0015 added Technical data updated Document structure updated
2.3.0	Technical data updated Document structure updated Chapter Disposal added New title page
2.2	Chapter Instructions for ESD protection updated Firmware and hardware versions updated Chapter Beckhoff Identification Code (BIC) added
2.1	KL2521-0010 added
2.0	Migration Document structure updated Technical data updated Installation instructions for enhanced mechanical load capacity added

Firmware (FF) and hardware versions (HH)

Documentation Version	KL2521, KS2521		KL2521-0010		KL2521-0015		KL2521-0024, KS2521-0024
Documentation Version	FF	HH	FF	HH	FF	HH	FF	HH
2.4.0	4F	09	5F	04	4F	09	4F	10
2.3.0	4F	09	5F	04	-	-	4F	10
2.2	4F	09	5F	04	-	-	4F	08
2.1	4F	08	5F	04	-	-	4F	07
2.0	4F	08	-	-	-	-	4F	07

The firmware and hardware versions (delivery state) of the terminal can be found in the serial number printed on the side.

Structure of the serial number: WW YY FF HH

WW - week of production (calendar week)
YY - year of production
FF - firmware version
HH - hardware version

Example with serial number 12 06 3A 02:

12 - week of production 12
06 - year of production 2006
3A - firmware version 3A
02 - hardware version 02