FiberPlex FOI-4451 - Manual (Page 10)

Power Requirements and Mounting
IMPORTANT: For many serial data applications it is necessary to provide a positive earth ground reference
for proper serial operation. Earth ground can only be supplied using the Phoenix connector. DC power can
still be applied with the wall adapter in conjunction with just the earth ground on the Phoenix.
Standalone Mounting
The FOI‐4451 and FOI‐4541 are part of the FOI line of products designed for ruggedized mil applications. They
are housed in the familiar FOI shielded can enclosure. For standalone applications they can be powered by
adding a PSQ‐4909 AC supply or a PSQ‐4920 DC power supply (not included).
For more rugged mounting, wall mount adapters, WMA‐2001 and WMA‐3002, are available to secure the
power supply and fiber optic isolator with screws. Both WMA‐2001 and WMA‐3002 are compatible with all
PSQ and FOI series. The WMA‐2001 has an optical patch while the WMA‐3002 does not. The wall mount
adapter attaches to either a horizontal or vertical flat surface and provides a convenient termination point
which protects both the fiber optic cable and the fiber optic isolator from damage.
Figure 3 Connecting to a PSQ‐4909 for Standalone application