Firmware compatibility

Beckhoff EtherCAT devices are delivered with the latest available firmware version. Compatibility of firmware and hardware is mandatory; not every combination ensures compatibility. The overview below shows the hardware versions on which a firmware can be operated.

Note

It is recommended to use the newest possible firmware for the respective hardware.
Beckhoff is not under any obligation to provide customers with free firmware updates for delivered products.

Note

Risk of damage to the device!

Pay attention to the instructions for firmware updates on the separate page.
If a device is placed in BOOTSTRAP mode for a firmware update, it does not check when downloading whether the new firmware is suitable. This can result in damage to the device!
Therefore, always make sure that the firmware is suitable for the hardware version!

EL2521
Hardware (HW)	Firmware	Revision no.	Date of release
02	03	EL2521-0000-0016	2008/08
02 - 05	04		2008/09
02 - 05	05		2008/09
05 - 16*	06	EL2521-0000-0018	2009/01
	07	EL2521-0000-0019	2011/01
	08		2011/04
	09		2011/04
	10		2012/04
		EL2521-0000-0020	2012/05
		EL2521-0000-0021	2012/07
	11*		2014/05
	11*	EL2521-0000-0022	2014/11

EL2521-0024
Hardware (HW)	Firmware	Revision no.	Date of release
05 - 16*	06	EL2521-0024-1016/17	2009/01
	07	EL2521-0024-1018	2011/01
	08		2011/04
	09		2011/04
	10		2012/04
		EL2521-0024-1019	2012/05
		EL2521-0024-1020	2012/07
	11*		2014/05
	11*	EL2521-0024-1021	2014/11

EL2521-0124
Hardware (HW)	Firmware	Revision no.	Date of release
05 - 06	01	EL2521-0124-0016	2009/09
	02		2010/03
	03	EL2521-0124-0017	2010/06
06 - 16*	04	EL2521-0124-0018	2011/01
	05		2011/05
		EL2521-0124-0019	2012/05
		EL2521-0124-0020	2012/07
	06*		2014/06

EL2521-0025
Hardware (HW)	Firmware	Revision no.	Date of release
00 - 08*	06	EL2521-0025-1016/17	2009/12
	07	EL2521-0025-1018	2011/01
	08		2011/04
	09		2011/04
	10		2012/04
		EL2521-0025-1019	2012/05
		EL2521-0025-1020	2012/07
	11*		2014/05
	11*	EL2521-0025-1021	2014/11

EL2521-1001
Hardware (HW)	Firmware	Revision no.	Date of release
02	03	EL2521-1001-0016	2008/08
02 - 05	04		2008/09
02 - 05	05		2008/09
05 - 13*	06	EL2521-1001-0017	2009/01
	07	EL2521-1001-0018	2011/01
	08		2011/04
	09		2011/04
	10		2012/04
		EL2521-1001-0019	2012/05
		EL2521-1001-0020	2012/07
	11*		2014/05

EL2522
Hardware (HW)	Firmware	Revision no.	Date of release
00 - 05*	01	EL2522-0000-0016	2013/12
	02	EL2522-0000-0017	2014/08
	03	EL2522-0000-0018	2014/09
	04	EL2522-0000-0019	2015/01
	05	EL2522-0000-0020	2015/01
	06	EL2522-0000-0021	2015/01
	07*	EL2522-0000-0022	2015/07

*) This is the current compatible firmware/hardware version at the time of the preparing this documentation. Check on the Beckhoff web page whether more up-to-date documentation is available.