Low current binary input subsystem

Details Low current binary input subsystem Low current binary input subsystem

1995-03-24

1997-09-30

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

With operation facilitating feature

307134, 200242, 335156, 361 6, H01H 158

Patent

active

056729197

ABSTRACT:
Disclosed is a low current binary input subsystem for providing a binary input signal to a data acquisition system. The binary input subsystem monitors the open/close state of a field contact and provides galvanic isolation of noisy field contacts, high noise immunity, a steady state current of approximately 1.2 milliamps resulting in power dissipation of approximately 0.25 watts for a 125 VDC input, and a momentary high current pulse of approximately 150 milliamps for a duration of approximately 4 milliseconds during field contact closure to aid in cleaning of oxides from the field contact.

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