It is required to add redundancy of Ethernet Switch connecting main and standby PLC to the redundant SCADA servers. What are the ways to achieve this?

The standalone switch already installed is ConneXium 8 Port Managed Switch.

One way that looks feasible to me is to add one more NOE (Ethernet Module) in both the primary and standby rack and then connect this to redundant Ethernet switch. Is there any other way possible?

The standalone switch already installed is ConneXium 8 Port Managed Switch connected to NOE modules installed in both Main and Standby Rack.

 

Hello.

You need to share existing network structure (with PLC, switch, SCADA servers specification)

>One way that looks feasible to me is to add one more NOE
>(Ethernet Module) in both the primary and standby rack and
>then connect this to redundant Ethernet switch. Is there
>any other way possible?

Potentially, you can install redundant switch, and configure switch (media) redundancy.