{"product_id":"1756-ia32-allen-bradley-controllogix-series-discrete-input-module","title":"1756-IA32 Allen-Bradley ControlLogix Series Discrete Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-IA32\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1756IA32\u003c\/strong\u003e Discrete Input Module, operates as a dedicated hardware component for 120 VAC discrete signal acquisition and state sensing within ControlLogix chassis backplane environments.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown \u0026amp; Identification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1756\u003c\/strong\u003e: Chassis-based ControlLogix I\/O system hardware architecture platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIA32\u003c\/strong\u003e: 120 VAC nominal input voltage rating configured with 32 high-density discrete input channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1756IA32\u003c\/strong\u003e: Service spare part number variant corresponding to the standard 1756-IA32 assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Performance Parameters\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-IA32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e23.3 x 18.2 x 5.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax 6.1 W at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e20.8 BTU\/hr at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e74 to 132 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e120 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e32 (4 groups of 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Current (Max)\u003c\/td\u003e\n\u003ctd\u003e2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Current\u003c\/td\u003e\n\u003ctd\u003e5 mA at 74 VAC (min) \/ 10 mA at 132 VAC (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5V)\u003c\/td\u003e\n\u003ctd\u003e165 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Hardware Delay\u003c\/td\u003e\n\u003ctd\u003eOFF to ON: 1.5 ms nom \/ 10 ms max + filter time; ON to OFF: 1 ms nom \/ 8 ms max + filter time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP Networks \u0026amp; System Architecture\u003c\/h3\u003e\n\u003cp\u003eThe module utilizes high-density I\/O density scaling across the local backplane, transmitting channel states to ControlLogix PAC controllers over EtherNet\/IP deterministic networks. Embedded hardware logic provides selectable programmable filter delays of 9 ms or 18 ms to suppress contact bounce. Module keying and software-defined electronic keying prevent physical insertion errors into incorrect backplane slots, preserving firmware flash compatibility across active controller projects.\u003c\/p\u003e\n\u003ch3\u003eDelivery Package Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1756-IA32 ControlLogix Module Unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWiring Protocol \u0026amp; Slot Assembly Guidelines\u003c\/h3\u003e\n\u003ch4\u003eChassis Insertion \u0026amp; Keying\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConfigure slot electronic keying parameters in Logix Designer before inserting the card into the 1756 backplane.\u003c\/li\u003e\n\u003cli\u003eAlign the circuit board with the top and bottom chassis card guides, pushing firmly until the top and bottom retaining tabs latch cleanly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eField Wiring \u0026amp; Cable Separation\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConnect 120 VAC field wiring via a 36-pin or 20-pin Removable Terminal Block (RTB) or IFM pre-wired cable system.\u003c\/li\u003e\n\u003cli\u003eMaintain strict physical separation between 120 VAC discrete input conductors and low-level analog or communication bus cabling to prevent inductive crosstalk.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the nominal operating voltage range for the 1756-IA32 inputs?\u003c\/p\u003e\n\u003cp\u003eThe input channels accept AC operating signals ranging from 74 VAC minimum up to 132 VAC maximum at 50\/60 Hz frequencies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat current does the module draw from the 5 VDC backplane bus?\u003c\/p\u003e\n\u003cp\u003eThe card draws a continuous current load of 165 mA from the 5 VDC chassis backplane rail during standard operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat digital input filtering options can be configured on this module?\u003c\/p\u003e\n\u003cp\u003eEngineers can select programmable digital input filter times of either 9 ms or 18 ms to accommodate field contact settling times.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the maximum allowable off-state leakage current?\u003c\/p\u003e\n\u003cp\u003eField devices must maintain an off-state leakage current below 2.5 mA to ensure the channel detects a valid logic OFF condition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow much power does the module dissipate under maximum operating thermal load?\u003c\/p\u003e\n\u003cp\u003eThe module dissipates a maximum of 6.1 W at 60 deg C, equivalent to a thermal dissipation rate of 20.8 BTU\/hr.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAre the 32 input channels isolated from one another?\u003c\/p\u003e\n\u003cp\u003eThe 32 input channels are arranged in 4 isolated groups of 8 channels each, sharing common neutral return points per group.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat hardware propagation delays apply to state transitions?\u003c\/p\u003e\n\u003cp\u003eOFF-to-ON hardware delay is 1.5 ms nominal (10 ms max) plus filter time; ON-to-OFF is 1.0 ms nominal (8 ms max) plus filter time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the 1756-IA32 support Removal and Insertion Under Power (RIUP)?\u003c\/p\u003e\n\u003cp\u003eYes, ControlLogix modules support RIUP, allowing module replacement while backplane power is applied if the area is non-hazardous.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066413633709,"sku":"1756-IA32","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1756-ia32_1.jpg?v=1786351724","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1756-ia32-allen-bradley-controllogix-series-discrete-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}