# Device compatibility x20 cp 3584 /3585

**URL:** <https://community.br-automation.com/t/device-compatibility-x20-cp-3584-3585/3537>\
**Category:** Controls & Vision\
**Tags:** plc\
**Created:** [June 15, 2024, 6:51am UTC](https://community.br-automation.com/t/device-compatibility-x20-cp-3584-3585/3537 "2024-06-15T06:51:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![qqqq.2000](https://avatars.discourse-cdn.com/v4/letter/q/FF8800/32.png) [@qqqq.2000](https://community.br-automation.com/u/qqqq.2000)\
**Post date:** [June 15, 2024, 6:51am UTC](https://community.br-automation.com/t/device-compatibility-x20-cp-3584-3585/3537/1 "2024-06-15T06:51:03Z")

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Hello, I have no experience with B&R devices. The CPU model X20 CP 3584 in our machine has malfunctioned. If we replace it with the X20 CP 3585 model, will the system work properly when we insert the existing SD card? Will it maintain compatibility, or will any configuration be required?

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**Author:** ![christoph.hilchenbac](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/christoph.hilchenbac/32/423_2.png) [@christoph.hilchenbac](https://community.br-automation.com/u/christoph.hilchenbac)\
**Post date:** [June 15, 2024, 5:44pm UTC](https://community.br-automation.com/t/device-compatibility-x20-cp-3584-3585/3537/2 "2024-06-15T17:44:40Z")

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Hello @qqqq.2000 ,

unfortunately not. You must be in possession of the corresponding Automation Studio project. Then you can simply replace the CPU, compile it and you’re good to go.