DIO24, User Manual
NOTE:
Consult the factory if additional information is required.
2.5. Cables
2.5.1. Loop Back Test Cable
The loop back test cable is used for DIO24 testing operations. It is used with both the RS485/422 and the PECL
interfaces. The cable is used by various test applications that verify the functionality of both the DIO24 and the
corresponding device driver. On this cable, all three ports are wired in parallel such that all Port A pins are wired
directly to the same identical pins for both Port B and Port C. In addition, the Dedicated Input is wired in parallel
with the three D0 pins. This means that the Port A D0+ pin is connected to the three pins Port B D0+, Port C D0+
and Dedicated Input+. The same procedure applies to all remaining pins.
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