{"product_id":"allen-bradley-1746-ih16-slc-500-digital-dc-input-module","title":"Allen-Bradley 1746-IH16 SLC 500 Digital DC Input Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-IH16\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-density discrete input interface for the Allen-Bradley SLC 500 chassis. It provides 16 isolated channels designed specifically to sense high-voltage DC signals (125VDC nominal). This module bridges the gap between high-voltage field devices and the low-voltage logic of the PLC processor. Despite the manufacturer’s discontinued status, we offer\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New, original units\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto ensure the continued operation of your mission-critical control systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThis module features a robust hardware profile designed for heavy-duty switching environments.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoltage Category\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e90–146V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current (5V)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.085 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current (24V)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.000 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSignal Delay (Max)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8ms (On to Off) \/ 8ms (Off to On)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.00 lbs (0.45 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Voltage Direct Sensing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1746-IH16 eliminates the need for interposing relays when monitoring 125VDC circuits. This simplifies cabinet wiring, reduces points of failure, and saves significant DIN rail space.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnhanced Noise Immunity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe high-voltage threshold inherently rejects low-level electromagnetic interference (EMI) and crosstalk from adjacent AC cables, ensuring signal integrity in electrically \"noisy\" power plants or substations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSeamless Backplane Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module slides directly into any available slot in a 1746 chassis. It draws minimal current from the SLC backplane, allowing engineers to maximize the I\/O density without overloading the power supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Fault Recovery:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBy utilizing\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efactory-sealed modules, maintenance teams avoid the risks associated with aged capacitors or degraded terminal blocks found in used equipment, ensuring immediate system restoration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the 1746-IH16 in a remote I\/O rack?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The module operates flawlessly in any local SLC 500 chassis or a remote 1747-ASB\/ACNR adapter-linked rack, provided the backplane supports 1746 I\/O.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary difference between this and standard 24VDC modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1746-IH16 targets high-voltage utility and power generation applications. It requires a minimum of 90VDC to register an \"On\" state, whereas standard modules trigger at much lower thresholds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module require a separate external power supply for the inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. You must provide the 125VDC field power to the input terminals. The module only draws logic-side power (5VDC) from the PLC backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this unit compatible with the SLC 5\/01, 5\/02, 5\/03, 5\/04, and 5\/05 processors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely. The 1746-IH16 maintains universal compatibility across the entire SLC 500 processor range, ensuring a versatile fit for any legacy system upgrade or repair.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52846033043765,"sku":"1746-IH16","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1746-IG16_7a16f30b-14df-4691-94bb-7eb5cebccf5e.jpg?v=1778204448","url":"https:\/\/www.5gplc.com\/products\/allen-bradley-1746-ih16-slc-500-digital-dc-input-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}