Signal distributor test arrangement

Details Signal distributor test arrangement Signal distributor test arrangement

1979-08-13

1980-10-14

Robinson, Thomas A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324415, H04M 326

Patent

active

042283280

ABSTRACT:
An arrangement for testing relay contacts of a signal distributor is disclosed. The output relay contacts are coupled via isolation diodes to a common circuit node and the input relay contacts are coupled to a second node. A potential is applied to the first node through the diodes and contacts to a single scan point and selective operation of each distributor relay can be verified at the scan point. By reversing the nodes, the integrity of the diodes can be checked. Make, break, and transfer contacts are tested.

REFERENCES:
patent: 3919504 (1975-11-01), Crosley et al.
patent: 4035592 (1977-07-01), Baudoin
patent: 4076970 (1978-02-01), Lubarsky, Jr. et al.

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