What is (single controller or agents) and (controller + unlimited agents) for EAM?

[srikantakumar.sahu]

What is the difference between (single controller or agents) and (controller + unlimited agents)?
For a plant to have one central ignition gateway and multiple client gateway in different geographic location. Which EAM module to purchase?

Does each client require a single EAM Module? Then what is the purpose of (controller + unlimited agents) EAM Module?

Please explain in details.

[JordanCClark]

Not much details. Simply put, it’s math.

Each gateway requires an EAM module to act as the controller or as an agent. At current pricing of $18900 USD, that would be a 14 unit break-even point.