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EESX20 and EESX30
Release 1.5 04/2020
Devices for a galvanic separation are not present on the EESX module itself. Appropriate isolation can be
achieved by using an external 1:1-Ethernet transformer.
If no electrical isolation is required, the module can also be connected directly to another Ethernet PHY
device. In this case, capacitive coupling can be applied.
3.7.1
Capacitive Coupling
– 100Base-FX
The Ethernet signals TD-/+_FX_P* and RD-/+_FX_P* shall be coupled directly with a capacitor (100 nF)
for all ports in FX-Mode (see
Figure 3-10
) if the capacitors are not implemented in the used SFP and 1*9
transceivers.
On the host device side, the circuit is dependent of the used PHY component. Please refer to the data
sheet of the appropriate PHY vendor.
Figure 3-10: Capacitive Coupling - Circuit Diagram
3.7.2
Magnetics Coupling
– 10/100Base-TX
The Ethernet signals TD-/+_/TX_P* and RD-/+_TX_P* shall be coupled with a magnetic transformer for
all ports in TX-Mode (see
Figure 3-11
).
On the host device side, the circuit is dependent of the used PHY component. Please refer to the data
sheet of the appropriate PHY vendor.
