The Schneider Electric 140-DDI-353-00 is a 32-input, 24 V DC discrete input module for the Modicon Quantum PLC family, delivering four 8-channel blocks of sink-type digital inputs. It uses 64 contiguous input references for addressing—32 for the input data and 32 for broken-wire signals (or 4 contiguous input words with 2 data words and 2 for broken-wire signals)—and is designed to mount on the Quantum I/O bus. Common applications include factory automation, process control, and safety interlock circuits that require 24 V DC digital inputs.
