{"product_id":"621-1100r-honeywell-discrete-input-module","title":"621-1100R | Honeywell | Discrete Input Module","description":"\u003cp\u003eThe \u003cstrong\u003e621-1100R\u003c\/strong\u003e Discrete Input Module is a high-voltage binary state detection unit manufactured by Honeywell for industrial automation systems. Designed to ingest 8 discrete input channels operating across a 90 to 140 VAC\/VDC voltage range, the module acquires real-time contact status from field switches, pressure transmitters, and auxiliary relay outputs. It incorporates internal filtering logic with controlled input turn-on and turn-off delays to attenuate contact bounce across field circuits.\u003c\/p\u003e\n\u003ch3\u003eSignal Isolation and Circuit Architecture\u003c\/h3\u003e\n\u003cp\u003eThe module utilizes optoelectronic isolation barriers between field-side input terminals and internal +5 VDC logic buses. Arranged into two isolated groups of four channels sharing a common return line, the channel isolation topology prevents high-voltage inductive spikes from crossing into central processor backplanes and shields parallel signal lines from switching transients.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlign the module edge guide with the designated subrack card slot and slide the assembly in until the backplane connectors interface securely.\u003c\/li\u003e\n\u003cli\u003eFasten the top and bottom front panel locking screws to establish chassis frame earth grounding and prevent vibration-induced disconnection.\u003c\/li\u003e\n\u003cli\u003eWire the 115 VAC\/VDC input conductors ensuring field connections adhere to the 4-points-per-common grouping structure across both isolated commons.\u003c\/li\u003e\n\u003cli\u003eSeparate high-voltage AC\/DC field input wiring from low-level analog and communication cables within cabinet wire ducts to maintain optimal signal isolation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\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\u003e621-1100R\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\u003eDiscrete Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e8 points (2 commons, 4 points per common)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e115 VAC\/VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e90 to 140 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current Range\u003c\/td\u003e\n\u003ctd\u003e6 to 21 mA (12 mA typical at 115 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Off-State Leakage\u003c\/td\u003e\n\u003ctd\u003e2 mA AC \/ 3 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Delay (Off to On)\u003c\/td\u003e\n\u003ctd\u003e2.4 ms ±20% plus 0-0.5 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Delay (On to Off)\u003c\/td\u003e\n\u003ctd\u003e17 ms ±20%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e+5 VDC at 30 mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e51 mm x 241 mm x 191 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.34 kg (0.76 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 621-1100R module be hot-swapped while the rack backplane is fully energized?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the module supports live insertion and removal on an energized rack, provided extraction guide tabs are pulled straight out to prevent connector pin binding.\u003c\/p\u003e\n\u003cp\u003eQ: What is the maximum allowable off-state leakage current across connected field contacts?\u003c\/p\u003e\n\u003cp\u003e A: Connected field devices must not exceed an off-state leakage current of 2 mA for AC signals or 3 mA for DC signals to prevent false-on input triggering.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":68075819991336,"sku":"621-1100R","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/621-1100R.png?v=1793613056","url":"https:\/\/www.powerdcs.com\/ar\/products\/621-1100r-honeywell-discrete-input-module","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}