We as B&R recommend the use of the following operating elements (aka push-buttons) for proper installation and operation together with the expansion covers (5ACCKP00.xxxx-000) of our AP5000: RAFIX 22 FS series, RAFIX 22 FS+ series and SHORTRON series.
But I wonder if any of you have tested other brands with positive feedback just to be aware of alternatives in case of an emergency or limitations in the local market where a machine is being operated (spare-part).
It looks like you got some good answers from Simon, and it has been a couple of weeks since the last activity on this post. If the answers helped you with your question, can you help the next person with the same question by marking the solution on the information which helped you the most. If you still have open questions on this topic, can you provide an update?