{"product_id":"allen-bradley-1756-tbnh-controllogix-removable-terminal-block","title":"Allen-Bradley 1756-TBNH ControlLogix Removable Terminal Block","description":"\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe Allen-Bradley \u003cstrong\u003e1756-TBNH\u003c\/strong\u003e is a 20-position NEMA-style screw clamp removable terminal block (RTB) designed to provide dedicated field-side interface connections for ControlLogix I\/O modules. This accessory plugs directly into the front electrical interface of standard 1756 I\/O modules, allowing plant technicians to install, modify, or swap field instrumentation without disconnecting individual signal conductors or disturbing localized panel wire looms. Featuring a robust housing structure rated for high-temperature operational demands, it accommodates multi-conductor combinations of solid or stranded wiring across standard instrumentation gauges.\u003c\/p\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1rem;\"\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003e20-Position Form Factor\u003c\/strong\u003e: Incorporates 20 distinct terminal path channels to handle dense field sensor and actuator distributions.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eDual Conductor Support\u003c\/strong\u003e: Each localized termination position accommodates up to 2 independent conductors, enabling efficient signal jumping or parallel circuit routing.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eFlexible Wire Composition\u003c\/strong\u003e: Fully compatible with both solid and stranded copper wire frameworks.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eHigh-Temperature Rating\u003c\/strong\u003e: Designed to safely execute in heavy-duty processing margins with a physical wiring temperature rating of 90 degC or higher.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eRemovable Framework\u003c\/strong\u003e: Enables instantaneous mechanical uncoupling from the host module block to simplify control panel servicing and maintenance operations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1rem;\"\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003eField connection sourcing for discrete and analog digital ControlLogix automation modules.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003eMarshalling panel marshalling and signal consolidation inside dense industrial enclosure schemes.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003eEnvironments experiencing high machine vibration or thermal cycling requiring stable screw-retained conductor pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"border-bottom: 2px solid #1a365d; text-align: left;\"\u003e\n\u003cth style=\"padding: 0.5rem; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 0.5rem; font-weight: bold;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e1756-TBNH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eRemovable Terminal Block (RTB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eProduct Line\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eControlLogix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e612598171859\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eNumber of Supported Positions\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e20 Positions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eTermination Style\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eScrew Clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eWire Types Supported\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eSolid and Stranded Copper Wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eWiring Temperature Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e90 degC or higher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eWire Size Range\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e22 to 14 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eMaximum Conductors per Terminal\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e2 conductors per terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eScrew Connection Torque\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e1.36 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eScrewdriver Width Limit\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e8 mm max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModule Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e1756 ControlLogix I\/O Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e0.25 lbs (0.11 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe 1756-TBNH is a heavy-duty 20-position block featuring NEMA-style screw clamps. It cannot directly substitute for standard 36-position modules (such as the 1756-TBCH or 1756-TBSH) due to strict mechanical pitch and footprint variances. When building systems prone to severe continuous mechanical vibration or where swift tooling is preferred, the spring-clamp version 1756-TBS6H should be considered if slot parameters align. Ensure the target I\/O module explicitly references 20-position block tracking in its installation documentation.\u003c\/p\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eA major point of systemic failure stems from under-torquing or over-torquing the screw terminals during commissioning phases. Failing to reach the specified 1.36 Nm threshold can generate high-resistance connections or intermittent signal drops under thermal variation, while exceeding it risks stripping the internal threads. Additionally, if the tool blade width exceeds 8 mm, it can crack the plastic protective barriers between the pins, degrading the electrical creepage path. Ensure that all conductors are stripped neatly and fully seated beneath the clamp to prevent loose copper strands from spanning neighboring circuits.\u003c\/p\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n\u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e Completely isolate and de-energize all primary lines and field-side auxiliary loops prior to assembling or inserting the terminal block mechanism. Interfacing or seating wire bundles while circuits remain energized can provoke localized electric arcs, resulting in data loop disruption, field component damage, or explosion hazards in volatile zones.\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 0.75rem; margin-top: 0.1rem;\"\u003e1\u003c\/div\u003e\n\u003cdiv style=\"color: #2d3748;\"\u003eExamine the host 1756 module housing interface to ensure all locking tracks and internal mechanical connector paths are clean and uninhibited.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 0.75rem; margin-top: 0.1rem;\"\u003e2\u003c\/div\u003e\n\u003cdiv style=\"color: #2d3748;\"\u003eStrip conductor ends to the recommended length, ensuring the gauge is safely between 22 and 14 AWG. Use copper wire rated for 90 degC or higher.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 0.75rem; margin-top: 0.1rem;\"\u003e3\u003c\/div\u003e\n\u003cdiv style=\"color: #2d3748;\"\u003eRoute wire lines through the bottom or side pathways of the enclosure wire duct, leaving sufficient slack to allow the block assembly to separate.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 0.75rem; margin-top: 0.1rem;\"\u003e4\u003c\/div\u003e\n\u003cdiv style=\"color: #2d3748;\"\u003eInsert wire leads under the screw clamp plates and tighten down the termination assembly to exactly 1.36 Nm using an 8 mm or narrower slotted screwdriver.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 0.75rem; margin-top: 0.1rem;\"\u003e5\u003c\/div\u003e\n\u003cdiv style=\"color: #2d3748;\"\u003eAlign the wired terminal block with the mating guide pins on the front interface of the matching 1756 I\/O module.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n\u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; font-weight: bold; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 0.75rem; margin-top: 0.1rem;\"\u003e6\u003c\/div\u003e\n\u003cdiv style=\"color: #2d3748;\"\u003ePress the assembly firmly into the front slot until the latching tabs seat flush and click, mechanically locking the electrical path.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695181230443,"sku":"1756-TBNH","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1756-tbnh-screw-terminal-block-jqgzz1r2ygo_337eb655-4b17-46b7-a929-f9ad7ba6418a.jpg?v=1766114295","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1756-tbnh-controllogix-removable-terminal-block","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}