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Model 922-MES – User Manual
6.8 Electrical Interfaces
This section shows the schematics of the user accessible interface circuits, which are the +24V power input and
copper Ethernet interfaces.
6.8.1 +24V Power Input
The power input interface schematic in the figure below shows the input protection diodes, common mode EMC
filter and DC-DC converter. Power input must be within +20VDC to +28VDC. Ideal input voltage is +24VDC
and provided by a supply with a Safety Extra Low Voltage (SELV) rating. See section 2.0 for specification
details.
Figure 6-4: Power Input Interface Schematic
6.8.2 Ethernet Interface
The Ethernet interface schematic shown in the figure below, is identical for all Ethernet copper ports. This
schematic shows the transformer isolation, REF (shield), and termination used.
Figure 6-5: Copper Ethernet Interface Schematic
Focal Technologies Corporation
Page 6-6
A Moog Inc. Company
Document No. 922-0662-00, Rev 1.0
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