The Allen-Bradley Bulletin 1492 wiring system replaces the point-to-point wiring between a PLC I/O module and individual terminal blocks, which helps to provide quick and accurate connections between control and factory devices. Interface modules (IFM) connect through prewired cables to digital and analog I/O. A simplified design helps to reduce the bill of materials, and one IFM module and cable replace multiple terminal blocks, wires and terminations. With this flexible design, users can implement feed-through, LED indication, fusing and interposing relay IFMs to meet application needs.
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