Shielding on connection distrubution board ET200

[danie0408]

I'm sorry if this is a stupid question , but I can't figure this out. I am wondering if I somehow need to add ground planes to shield my PCB;

I have a Siemens ET200eco PN M12-L (6ES7148-6JE00-0BB0). Right now, the connections are distributed to terminals and from there connected to sensors.

I am making a PCB that takes the connections from the ET200 and distributes them to terminals. The ports are either switched or non-switched, I think these should be connected. Two connectors of the PCB use the switched power and three use the non-switched power. One connector doesn't use ground, only 24V+ and the signals. I don't want to connect the grounds from these connectors, to prevent cross connection. So if I were to shield the PCB I would have four different ground planes and one connector without shielding, because it doesn't use ground.

These are all digital signals, so shielding wouldn't be very necessary, right? I have a feeling shielding these connectors doesn't make sense, as there was no shielding before and it worked fine. Am I right, or am I missing something?

I've attached the current state of the PCB and the warning I found in the ET200 manual.

[T3sl4co1l]

This seems to be relevant,
https://cache.industry.siemens.com/dl/files/293/109778293/att_1027365/v2/et200ecopn_di_8x24vdc_m12l_8xm12_manual_en-US_en-US.pdf
but I don't know which parts of it to refer to.

Are the cables shielded?

What kind of signaling do they use?

What are you connecting from and to? Is it legal to fan out these signals?  Is it not a fan-out at all, just a straight-through connector adapter more or less?

Tim

[thm_w]

How you've drawn it makes sense, just having individual straight through wiring to the connectors. The planes probably aren't necessary, looks like almost all DC connections, but won't hurt.

Only thing to check is if any of these are higher current connections or not, then might want wider traces.

[danie0408]

Hi, thank you for your reply, and sorry for my late response.

The cables from the et200 could be shielded, but the cable out from the terminals is not shielded.

These are digital signals.

The connections mainly go to a spindle, normally they are fanned out using din rail terminals. The goal was to make it easier to assemble using a PCB.

Kind regards

[danie0408]

Hi thm_w,

These are all DC connections indeed. I did do some calculations for the needed trace width.

Thanks for your reply and your help!