{"product_id":"abb-ntdi21-b-bailey-infi-90-digital-input-termination-hardware","title":"ABB NTDI21-B Bailey INFI 90 Digital Input Termination Hardware","description":"\u003ch2\u003eABB NTDI21-B Bailey INFI 90 Digital Input Termination Unit\u003c\/h2\u003e\n\u003cp\u003eThe ABB \u003cstrong\u003eNTDI21-B\u003c\/strong\u003e is a digital input termination unit designed for ABB Bailey INFI 90 distributed control systems. It provides an organized physical interface between field wiring and system-level digital input circuitry, terminating 16 discrete signal channels from field sensors, switches, and pushbuttons within industrial control cabinets.\u003c\/p\u003e\n\u003ch3\u003eSignal Connection and Operational Features\u003c\/h3\u003e\n\u003cp\u003eThe termination hardware interfaces 16 digital input channels operating at 24 V DC field signal levels, with a typical input current of 2 to 5 mA per channel. Built-in signal isolation transformers and surge protection safeguard the control system circuitry from field-side voltage transients and ground loops.\u003c\/p\u003e\n\u003ch3\u003eDiagnostics and System Integration\u003c\/h3\u003e\n\u003cp\u003eDesigned for mounting in industrial control cabinets, the unit includes hardware-level fault detection and diagnostic reporting capabilities to assist maintenance engineers in troubleshooting field wiring integrity. Screw terminal blocks accommodate structured connection layouts for standard 24 V DC discrete automation signals.\u003c\/p\u003e\n\u003cfigure class=\"table\"\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\u003eNTDI21-B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB Bailey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eBailey INFI 90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDigital Input Termination Hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e16 digital inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Signal Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003eApprox. 2 mA to 5 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Protection\u003c\/td\u003e\n\u003ctd\u003eSurge protection, isolation transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic Functions\u003c\/td\u003e\n\u003ctd\u003eBuilt-in fault detection and reporting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Connection\u003c\/td\u003e\n\u003ctd\u003eIndustrial field wiring terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eIndustrial control cabinet mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e630 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: Which control system is the ABB NTDI21-B compatible with? A: The NTDI21-B is specifically designed for integration within ABB Bailey INFI 90 distributed control systems.\u003c\/p\u003e\n\u003cp\u003eQ: What channel capacity and signal voltage does the NTDI21-B support? A: It provides signal termination for 16 digital input channels operating at a nominal 24 V DC field voltage.\u003c\/p\u003e\n\u003cp\u003eQ: What protective features are built into the termination unit? A: The unit features integrated surge protection and isolation transformers to shield system circuitry from electrical transients and field noise.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":43779769499747,"sku":"NTDI21-B","price":676.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/378_157d0503-06ca-4dd2-935b-7f3c73c363d4.jpg?v=1760496813","url":"https:\/\/www.autocontrolglobal.com\/products\/abb-ntdi21-b-bailey-infi-90-digital-input-termination-hardware","provider":"AutoControl Global","version":"1.0","type":"link"}