Plastic Fiber Interface: RS232, 25-pin, DCE Pinout Model 81025

Model 81025 - Application:
PC connection over fiber-optic cables

Background knowledge:
Power for the interfaces
The interface type described on this page is powered from the signal lines of
the serial interface and generally requires no external power supply to operate
on standard RS232 interfaces.

If however there are supply problems due to low-power interfaces, it is
always possible to externally power the interface with up to 9V using its
handshake inputs, or to use fiber-optic interfaces having their own power
supply (e.g. model 81201).

With model 81029 there is also a 9-pin special version whose maximum
transmission distance is limited to 20 meters, but which only loads the
connected RS232 interface with a current of approx. 2mA. With this version it
is also possible to operate on less-powerful RS232 interfaces without having
to connect a separate power source.

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