Model 920 Ethernet Data Multiplexer Manual
Focal Technologies Corporation
Page 2-2
A Moog Inc. Company
920-0603-00 Rev K
Figure 3: Model 920 EDM Front Side
2.1.1 Diagnostic Ethernet Port
– 10/100 Base-T(X)
The diagnostic port provides an Ethernet link to extract system health and statistics via Modbus protocol as
detailed in section 5.0. This link provides information about the local 920-
EDM, and the status of the ‘far end’
or Remote 920-EDM. Standard auto-negotiation to 10 or 100 Mbps and auto-crossover capabilities are
provided. CAT5 or better cabling is recommended for all installations with a maximum cable length of 100m.
2.1.2 EtherCAT Ports 1 and 2
– 100 Base-TX
All packets to/from Ethernet channel 1 connect directly to Ethernet channel 1 on the Remote far side of the
Model 920 system. The same applies to Ethernet port 2. As such, each Ethernet channel is completely isolated
and independent from the other with dedicated bandwidth, ideal for real-time low latency protocols such as
Ether CAT.
Each port operates at 100 Mbps with auto-crossover capabilities provided. CAT5 or better cabling is
recommended for all installations with a maximum cable length of 100m.
