{"product_id":"allen-bradley-1746-ht-slc-500-termination-panel","title":"Allen-Bradley 1746-HT SLC 500 Termination Panel","description":"\u003ch1\u003eAllen-Bradley 1746-HT SLC 500 Termination Panel\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-HT\u003c\/strong\u003e, also cataloged as the 1746-HT Termination Panel, operates as a dedicated hardware interface component for signal termination and field wiring aggregation within SLC 500 backplane systems. Configured for digital I\/O and fast signal routing in SLC 500 rack-based architectures, the Allen-Bradley 1746-HT (1746-HT Termination Panel) provides direct electrical interfacing between field conductors and controller-side I\/O modules. The device presents a single-slot rack-mounted termination structure designed to align with 1746-HCA connection schemes and backplane power distribution paths.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\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\u003e1746-HT\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e10.2 cm x 7.6 cm x 33.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 VDC backplane: 200 mA; 24 VDC backplane: 90 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware Type\u003c\/td\u003e\n\u003ctd\u003eTermination Panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRack \/ DIN rail compatible structure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlots\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Connection\u003c\/td\u003e\n\u003ctd\u003e1746-HT \/ 1746-HCA interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Frequency\u003c\/td\u003e\n\u003ctd\u003e250 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e100 ms in, 2.5 ms out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Bus Communication and I\/O Handling\u003c\/h3\u003e\n\u003cp\u003eThe 1746-HT integrates into the SLC 500 backplane architecture where signal routing is synchronized through shared bus timing. The termination layer supports deterministic I\/O transfer behavior aligned with module scan cycles, while maintaining defined current draw across both 5 VDC and 24 VDC rails. The rack interface ensures stable conductor separation between field wiring and internal module logic domains, minimizing cross-load coupling across adjacent slots in dense I\/O configurations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1746-HT support hot-swap operation within SLC 500 racks?\u003cbr\u003eA: The module is designed as a passive termination interface. Removal or insertion should be performed with system power removed to avoid backplane signal disturbance.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane current impact of the 1746-HT?\u003cbr\u003eA: It draws approximately 200 mA from the 5 VDC backplane rail and 90 mA from the 24 VDC rail under standard operating conditions.\u003c\/p\u003e\n\u003cp\u003eQ: Is the 1746-HT electrically isolated from field wiring inputs?\u003cbr\u003eA: Isolation is dependent on the connected I\/O module architecture rather than the termination panel itself, which functions as a passive routing interface.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eThe 1746-HT shall be installed in a compatible SLC 500 rack assembly with secure mechanical seating on the designated slot position. Field wiring should be routed using shielded conductors where applicable, with shields terminated at a single-point ground to reduce ground loop currents. All terminal connections must be tightened to manufacturer torque specifications for the associated terminal blocks.\u003c\/p\u003e\n\u003cp\u003eBackplane insertion must be verified for full engagement to ensure continuity across signal and power planes. Wiring segregation between high-speed encoder or fast I\/O lines and low-voltage control signals should be maintained to prevent coupling effects. System power must be removed prior to installation or replacement of the termination panel.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43504095330394,"sku":"1746-HT","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-HT2.jpg?v=1781581090","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-ht-slc-500-termination-panel","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}