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The ACR9000's ethernet port did not auto-detect, 10/100Mbps. The ACR7000 does auto-detect straight-through or crossover ethernet cables and is 10/100Mbps.
Also known as the 7900, the 7000 series controller will have The 7000 series controller has the same pinout axis connectors and discrete I/O pinouts as the ACR9000.
The 7000 controller will have 7000 controller has 2 ethernet ports (a hub) that users can use (one tcp/ip address). The ACR9000 has one ethernet port.
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