The 1771-IB is a digital DC input module designed for use within the Universal I/O structure of Allen Bradley programmable controllers. It features 8 channels capable of accepting voltage inputs in the range of 10 to 27 VDC, with a nominal current of 8 mA at 12 VDC and 24 mA at 24 VDC. The module is compatible with both 2-wire and 3-wire devices such as DC proximity switches, photoelectric sensors, pushbuttons, and limit switches. It includes input filtering to minimize the effects of voltage transients caused by contact bounce or electrical interference. Additionally, the 1771-IB offers selectable off-delay filter times of either 1 ms or 6 ms for enhanced signal stability.
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