{"product_id":"32-channel-24vdc-digital-input-module-honeywell-tc-idd321","title":"32-Channel 24VDC Digital Input Module | Honeywell TC-IDD321","description":"\u003ch2\u003eHoneywell TC-IDD321 Experion LS Digital Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell TC-IDD321\u003c\/strong\u003e is a 32-channel, 24 VDC digital input module designed for Honeywell Experion LS control platforms. Installed in a Series A I\/O chassis, it interfaces discrete field signals—such as limit switches, relay contacts, and push buttons—into digital status data for real-time process monitoring and system interlocks.\u003c\/p\u003e\n\u003ch3\u003eInput Configuration and Filtering Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe module features a high-density 32-channel layout arranged into two isolated groups of 16 points per common. Inputs operate at a nominal 24 VDC voltage (10 to 31.2 VDC on-state range at 60 deg C) with IEC Type 1+ input compatibility. To mitigate electrical noise and signal bounce in field wiring, hardware input filters are individually configurable for OFF-to-ON transition delays (0, 1, or 2 ms) and ON-to-OFF transition delays (0, 1, 2, 9, or 18 ms), supplemented by a maximum hardware input delay of 1 ms.\u003c\/p\u003e\n\u003ch3\u003eElectrical Isolation and Wiring Interface\u003c\/h3\u003e\n\u003cp\u003eDesigned to prevent ground loops and protect internal system logic, the TC-IDD321 provides 1500 VDC electrical isolation between user field wiring and the system backplane, as well as between input channels. Field connections are made using a 36-position TC-TBNH terminal block. The unit consumes up to 6.1 W of power under full load conditions and handles peak inrush currents up to 250 mA.\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\u003eTC-IDD321\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDigital Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eExperion LS \/ Series A I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e32 channels (16 points per common)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10 – 31.2 VDC @ 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum On-State Current\u003c\/td\u003e\n\u003ctd\u003e2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Off-State Voltage\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Off-State Current\u003c\/td\u003e\n\u003ctd\u003e1.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Compatibility\u003c\/td\u003e\n\u003ctd\u003eIEC Type 1+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff to On Filter Delay\u003c\/td\u003e\n\u003ctd\u003eConfigurable: 0, 1, or 2 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn to Off Filter Delay\u003c\/td\u003e\n\u003ctd\u003eConfigurable: 0, 1, 2, 9, or 18 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware Input Delay\u003c\/td\u003e\n\u003ctd\u003eMax. 1 ms (plus configured filter time)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VDC for 1 second (Channel-to-Channel \u0026amp; User-to-System)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Power Dissipation\u003c\/td\u003e\n\u003ctd\u003e6.1 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInrush Current\u003c\/td\u003e\n\u003ctd\u003e250 mA peak (decaying below 37% within 22 ms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Block\u003c\/td\u003e\n\u003ctd\u003e36-position TC-TBNH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eHoneywell Series A I\/O chassis\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: What terminal block model is compatible with the Honeywell TC-IDD321 digital input module?\u003c\/p\u003e\n\u003cp\u003eA: The module connects to field cabling using the 36-position Honeywell TC-TBNH terminal block.\u003c\/p\u003e\n\u003cp\u003eQ: How are the 32 channels on the TC-IDD321 structured for wiring commons?\u003c\/p\u003e\n\u003cp\u003eA: The 32 channels are split into two groups, with 16 input points sharing a common reference per group.\u003c\/p\u003e\n\u003cp\u003eQ: What configurable filter options exist to suppress field contact bounce on this module?\u003c\/p\u003e\n\u003cp\u003eA: Users can configure OFF-to-ON filter delays to 0, 1, or 2 ms, and ON-to-OFF filter delays to 0, 1, 2, 9, or 18 ms, in addition to the base 1 ms hardware delay.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":42722934358115,"sku":"TC-IDD321","price":580.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/667..jpg?v=1792481247","url":"https:\/\/www.autocontrolglobal.com\/products\/32-channel-24vdc-digital-input-module-honeywell-tc-idd321","provider":"AutoControl Global","version":"1.0","type":"link"}