{"product_id":"allen-bradley-1756-cp3-a-rs-232-programming-cable","title":"Allen-Bradley 1756-CP3\/A RS-232 Programming Cable","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-CP3\/A RS-232 Programming Cable\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-CP3\/A\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-CP3\/A RS-232 programming cable\u003c\/strong\u003e, serves as the primary\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eserial programming interface lead\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eutilized to execute configuration, diagnostics, and controller communication across\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eControlLogix 555x\/556x Logix5000 platforms\u003c\/strong\u003e. It provides direct electrical RS-232 signal transport between a PC serial port and controller programming port.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eBase model: 1756-CP3 programming cable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuffix “\/A” indicates revision level of cable assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo functional segmentation beyond revision control is defined\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\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\u003e1756-CP3\/A\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e3 m cable length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive (no external supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Type\u003c\/td\u003e\n\u003ctd\u003eRS-232 serial communication cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector A\u003c\/td\u003e\n\u003ctd\u003eDB9 female (right-angle, controller side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector B\u003c\/td\u003e\n\u003ctd\u003eDB9 female (straight, PC side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eControlLogix 555x \/ 556x controllers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eProgramming, configuration, diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eCE, UL, IECEx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Bus Communication and Logix5000 Serial Link Behavior\u003c\/h3\u003e\n\u003cp\u003eThe cable operates as a point-to-point RS-232 physical layer interface without protocol conversion. Signal integrity is governed by voltage-level compliance within RS-232 standard limits, with asynchronous serial framing used by Logix5000 communication stack.\u003c\/p\u003e\n\u003cp\u003eRight-angle DB9 termination reduces mechanical strain in dense control cabinet layouts, maintaining connector retention under vibration and cable routing constraints.\u003c\/p\u003e\n\u003cp\u003eNo active electronics or buffering exist within the assembly; therefore, communication latency is strictly determined by controller UART timing and host serial port configuration parameters.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-CP3\/A contain any active signal conditioning electronics?\u003cbr\u003eA: No. The cable is a passive RS-232 physical layer interconnect without signal conversion or amplification.\u003c\/p\u003e\n\u003cp\u003eQ: Can the cable support hot-swap during active controller programming sessions?\u003cbr\u003eA: No. Connection or disconnection during active communication may interrupt serial session integrity and require re-establishment.\u003c\/p\u003e\n\u003cp\u003eQ: Is the cable compatible with Ethernet or USB ports?\u003cbr\u003eA: No. It is designed exclusively for RS-232 DB9 serial interfaces.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eEnsure both DB9 connectors are fully seated before initiating communication between PC and ControlLogix controller. Avoid mechanical stress on the right-angle connector to prevent pin deformation.\u003c\/p\u003e\n\u003cp\u003eRoute RS-232 cable separately from high-voltage or high-frequency switching conductors to minimize electromagnetic coupling. Maintain consistent shielding continuity along cabinet entry points.\u003c\/p\u003e\n\u003cp\u003eVerify serial port configuration parameters (baud rate, parity, stop bits) match controller communication settings prior to diagnostic or programming sessions.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43578711933018,"sku":"1756-CP3\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-CP31.jpg?v=1782896713","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-cp3-a-rs-232-programming-cable","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}