{"product_id":"ab-allen-bradley-1756-tbn-20-pin-screw-type-terminal-block","title":"AB Allen-Bradley 1756-TBN 20-Pin Screw-Type Terminal Block","description":"\u003ch3\u003eProduct Summary\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-TBN\u003c\/strong\u003e is a \u003cstrong\u003e20-Pin Screw-Type Terminal Block\u003c\/strong\u003e manufactured by Rockwell Automation for use with ControlLogix I\/O modules. It provides a removable wiring interface that allows field wiring to be disconnected from the module without disturbing the terminal connections, simplifying module replacement and maintenance. The screw-clamp design accepts a wide range of wire gauges for flexible industrial installation.\u003c\/p\u003e\n\n\u003ch3\u003eCore Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e 1756-TBN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 20-Pin Screw-Type Removable Terminal Block\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePositions:\u003c\/strong\u003e 20 pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Range (Single):\u003c\/strong\u003e 0.33–2.1 mm² (22–14 AWG) solid or stranded copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Range (Double):\u003c\/strong\u003e 0.33–1.3 mm² (22–16 AWG) solid or stranded copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Insulation Max:\u003c\/strong\u003e 1.2 mm (3\/64 in.)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Temperature Rating:\u003c\/strong\u003e 105°C (221°F) minimum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTorque Specification:\u003c\/strong\u003e 0.8 N·m (7 lb·in)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Snaps onto ControlLogix I\/O module front connector\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.136 kg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Allen-Bradley by Rockwell Automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical \u0026amp; Functional Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Screw clamp (NEMA style) — field wires secured via terminal screws\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemovability:\u003c\/strong\u003e Terminal block detaches from module as a complete unit, allowing module swap without rewiring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeying:\u003c\/strong\u003e Mechanically keyed to prevent incorrect insertion orientation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Material:\u003c\/strong\u003e Tin-plated copper for reliable conductivity and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Category:\u003c\/strong\u003e 1 — on signal ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSystem Integration \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Modules:\u003c\/strong\u003e All 20-pin ControlLogix I\/O modules including 1756-IA16, 1756-IB16, 1756-IF8, 1756-IR6I, 1756-IT6I, 1756-OA16, 1756-OB16, 1756-OF8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlatform:\u003c\/strong\u003e ControlLogix 1756 chassis\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelated Terminal Blocks:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003e1756-TBNH — 20-pin NEMA screw clamp (same form factor, alternate catalog)\u003c\/li\u003e\n      \u003cli\u003e1756-TBCH — 36-pin cage-clamp terminal block\u003c\/li\u003e\n      \u003cli\u003e1756-TBS6H — 36-pin spring-clamp terminal block\u003c\/li\u003e\n      \u003cli\u003e1756-TBSH — 20-pin spring-clamp terminal block\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEnvironmental \u0026amp; Operational Limits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to 60°C (32°F to 140°F)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -40°C to +85°C (-40°F to 185°F)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5% to 95% RH, non-condensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApprovals:\u003c\/strong\u003e GOST R certified, Marine (ABS, BVS, DNV, GL, KRS, LR), ROSTECHNADZOR\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cp\u003eWidely used across all ControlLogix installations in manufacturing, process control, oil \u0026amp; gas, water treatment, and material handling where removable terminal blocks enable quick module replacement and minimize downtime during maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eWhat is the 1756-TBN used for?\u003c\/h4\u003e\n\u003cp\u003eIt is a \u003cstrong\u003e20-pin screw-type removable terminal block\u003c\/strong\u003e that provides the field wiring interface for ControlLogix I\/O modules. The block detaches from the module as a unit, allowing module replacement without disconnecting individual wires.\u003c\/p\u003e\n\n\u003ch4\u003eWhat wire size does the 1756-TBN accept?\u003c\/h4\u003e\n\u003cp\u003eSingle wire: \u003cstrong\u003e0.33–2.1 mm² (22–14 AWG)\u003c\/strong\u003e. Double wire: \u003cstrong\u003e0.33–1.3 mm² (22–16 AWG)\u003c\/strong\u003e. Wire insulation must not exceed 1.2 mm diameter.\u003c\/p\u003e\n\n\u003ch4\u003eWhat is the torque specification?\u003c\/h4\u003e\n\u003cp\u003eTorque terminal screws to \u003cstrong\u003e0.8 N·m (7 lb·in)\u003c\/strong\u003e for secure, reliable connections.\u003c\/p\u003e\n\n\u003ch4\u003eWhat is the difference between 1756-TBN and 1756-TBNH?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003e1756-TBN\u003c\/strong\u003e and \u003cstrong\u003e1756-TBNH\u003c\/strong\u003e are functionally identical 20-pin NEMA screw-clamp terminal blocks with the same form factor and compatibility. The catalog number suffix difference reflects packaging or regional variations.\u003c\/p\u003e\n\n\u003ch4\u003eWhat are the related part numbers?\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1756-TBN — 20-pin screw-clamp terminal block (this part)\u003c\/li\u003e\n  \u003cli\u003e1756-TBNH — 20-pin NEMA screw-clamp terminal block\u003c\/li\u003e\n  \u003cli\u003e1756-TBCH — 36-pin cage-clamp terminal block\u003c\/li\u003e\n  \u003cli\u003e1756-TBS6H — 36-pin spring-clamp terminal block\u003c\/li\u003e\n  \u003cli\u003e1756-TBSH — 20-pin spring-clamp terminal block\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53684170784952,"sku":"1756-TBN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1756-TBNH__1.jpg?v=1775639243","url":"https:\/\/www.globalpetroparts.com\/products\/ab-allen-bradley-1756-tbn-20-pin-screw-type-terminal-block","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}