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.

Notice

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!

EL3773
Hardware (HW)	Firmware (FW)	Revision no.	Release date
00	01	EL3773-0000-0002	2011/08
01 - 06*	02	EL3773-0000-0017	2012/09
	03	EL3773-0000-0018	2012/10
	04		2013/08
	05		2013/08
	06	EL3773-0000-0019	2013/09
	07		2014/12
	08		2015/09
	09	EL3773-0000-0020	2016/05
	09	EL3773-0000-0021	2024/01
	10*		2024/01

*) 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.

Note on EL3773 firmware update

	Secondary voltage necessary for firmware updates In order to change the firmware of the EL3773, the permissible operating voltages must be applied both to the fieldbus side (E-Bus) and to the load side (power contacts), otherwise the terminal remains in INIT_ERROR or cannot be switched to BOOTSTRAP mode.