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Edge tier (site): EdgeConnect on Linux (router) polls ControlLogix (CIP/EtherNet/IP) and DF1 devices, and publishes via MQTT/Sparkplug B.
Backhaul: Satellite or constrained WAN with store-and-forward, rate limiting, compression, and payload batching.
Broker tier: Redundant MQTT brokers (N=4).
Clients/consumers: Third-Party brokers consumers.
2.2 Logical Diagram (high level)
| Scada & Enterprise Applications |
| ↑↓ |
| Redundant Brokers |
| ↑↓ |
| EdgeConnect Product Edition |
| ↑↓ |
| PLCs on field: DF1, ControlLogics, etc... |
2.3 Topology
Layer | Component | Role | Notes |
|---|---|---|---|
Field | ControlLogix (CIP), DF1 devices | Signals/controls | - |
Edge (Site) | EdgeConnect (Linux) | Collection, buffer, publish | Runs on router/IPC; AutoStart; Watchdog; local logging |
Transport | Satellite / WAN | Telemetry backhaul | - |
Brokers | MQTT brokers (HA, N=4) | Pub/Sub backbone | Persistent sessions, retained health topics |
Consumers | SCADA/Historian/Analytics | Enterprise visibility & actions | - |
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