# Need help with Siemens connection to ignition

**URL:** <https://forum.inductiveautomation.com/t/need-help-with-siemens-connection-to-ignition/93786>\
**Category:** Ignition\
**Created:** [July 26, 2024, 12:03pm UTC](https://forum.inductiveautomation.com/t/need-help-with-siemens-connection-to-ignition/93786 "2024-07-26T12:03:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![benjamin\_sales](https://avatars.discourse-cdn.com/v4/letter/b/9e8a1a/32.png) [@benjamin\_sales](https://forum.inductiveautomation.com/u/benjamin_sales)\
**Post date:** [July 26, 2024, 12:03pm UTC](https://forum.inductiveautomation.com/t/need-help-with-siemens-connection-to-ignition/93786/1 "2024-07-26T12:03:08Z")

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Looking for some help, i was task to get some out Older siemens plcs to communicate to Ignition. i personally haven't touched ignition much.  
we have a s7 cpu 412-2 that i need to connect to our network somehow...  
my question is that we already have a PC/HMI that connects with a USB a2 adapter to the line. is there a way to piggyback off the ethernet adapter on that pc to give access to ignition.

Let me know your thoughts or ideas.

Thanks,  
Benjamin Sales

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [July 26, 2024, 12:08pm UTC](https://forum.inductiveautomation.com/t/need-help-with-siemens-connection-to-ignition/93786/2 "2024-07-26T12:08:02Z")

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> [@benjamin\_sales](#):
>
> piggyback off the ethernet adapter on that pc

Natively from Ignition? Pretty sure not. Maybe there's a 3rd party OPC server that can do so.

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**Author:** ![stefanoranghetto](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@stefanoranghetto](https://forum.inductiveautomation.com/u/stefanoranghetto)\
**Post date:** [July 26, 2024, 12:26pm UTC](https://forum.inductiveautomation.com/t/need-help-with-siemens-connection-to-ignition/93786/3 "2024-07-26T12:26:27Z")

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I suggest for the old SIemens plc s7 300/400 without ethernet to use a product like that:

[Hilscher: NL 50-MPI–S7-200/300/400 Ethernet programming connector](https://www.hilscher.com/products/gateways-switches-for-industrial-communication/gateways-for-industrial-ethernet-fieldbus-serial/nl-50-mpi)

anyways the price is not distant to a native plc ethernet card ...