{"product_id":"allen-bradley-1756-l55m24-controllogix5555-controller","title":"Allen-Bradley 1756-L55M24 ControlLogix5555 Controller","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1756-L55M24\u003c\/strong\u003e is a ControlLogix5555 controller manufactured by Allen-Bradley that provides central processing and control capabilities for industrial automation applications. Designed to mount directly into a ControlLogix chassis, it communicates across the backplane to manage system I\/O, execute application logic, and facilitate data exchange.\u003c\/p\u003e\n\u003cp\u003eEquipped with a 1756-M24 nonvolatile memory board, the \u003cstrong\u003e1756-L55M24\u003c\/strong\u003e provides 3.5 MB of data and logic memory. The module features a 9-pin D-shell serial port supporting RS-232 communication for direct connection to programming workstations or external devices using a 1756-CP3 or 1747-CP3 cable. Operating status is indicated by front-panel LEDs for RUN, I\/O, FORCE, RS232, BAT, and OK conditions.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIncorporates a 1756-M24 memory board delivering 3.5 MB of data and logic memory.\u003c\/li\u003e\n\u003cli\u003eIncludes nonvolatile memory support for data and program retention.\u003c\/li\u003e\n\u003cli\u003eFront-panel RS-232 serial communication port for local programming and interfacing.\u003c\/li\u003e\n\u003cli\u003eFront-panel status indicators monitoring RUN, I\/O, FORCE, RS232, BAT, and OK states.\u003c\/li\u003e\n\u003cli\u003eThree-position keyswitch for selecting RUN, PROG, and REM operating modes.\u003c\/li\u003e\n\u003cli\u003eCan be installed or removed under backplane power (RIUP) in non-hazardous environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFactory automation systems\u003c\/li\u003e\n\u003cli\u003eIndustrial process control\u003c\/li\u003e\n\u003cli\u003eMachine control and sequence management\u003c\/li\u003e\n\u003cli\u003eDistributed I\/O and peer-to-peer controller communication\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-L55M24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eControlLogix5555\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData and Logic Memory\u003c\/td\u003e\n\u003ctd\u003e3.5 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNonvolatile Memory\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1V DC)\u003c\/td\u003e\n\u003ctd\u003e1.25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e5.7 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e19.4 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 degC (32 to 140 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC (-40 to 185 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95% noncondensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Shock\u003c\/td\u003e\n\u003ctd\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNonoperating Shock\u003c\/td\u003e\n\u003ctd\u003e50 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration\u003c\/td\u003e\n\u003ctd\u003e2 g @ 10 to 500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type Rating\u003c\/td\u003e\n\u003ctd\u003eNone, open style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e30V (continuous), Basic Insulation Type, RS232 to system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Battery\u003c\/td\u003e\n\u003ctd\u003e1756-BA1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight, approx.\u003c\/td\u003e\n\u003ctd\u003e0.36 kg (12.8 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eConnector Pin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 1\u003c\/td\u003e\n\u003ctd\u003eDCD (Data Carrier Detect)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 2\u003c\/td\u003e\n\u003ctd\u003eRXD (Receive Data)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 3\u003c\/td\u003e\n\u003ctd\u003eTXD (Transmit Data)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 4\u003c\/td\u003e\n\u003ctd\u003eDTR (Data Terminal Ready)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 5\u003c\/td\u003e\n\u003ctd\u003eGND (Common)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 6\u003c\/td\u003e\n\u003ctd\u003eDSR (Data Set Ready)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 7\u003c\/td\u003e\n\u003ctd\u003eRTS (Request To Send)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 8\u003c\/td\u003e\n\u003ctd\u003eCTS (Clear To Send)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin 9\u003c\/td\u003e\n\u003ctd\u003eN\/C (Not Connected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHandle the controller using a grounded wriststrap to prevent electrostatic discharge (ESD) damage to internal electronic components.\u003c\/li\u003e\n\u003cli\u003eDisconnect the battery from the controller before installing or replacing the memory board.\u003c\/li\u003e\n\u003cli\u003eAlign the circuit board with the top and bottom chassis guides and slide the module into any slot until the locking tabs engage.\u003c\/li\u003e\n\u003cli\u003eInstall and connect a 1756-BA1 lithium battery module before applying system power.\u003c\/li\u003e\n\u003cli\u003eEnsure that power is removed or the location is verified as non-hazardous prior to connecting\/disconnecting the serial cable, battery, or backplane connection.\u003c\/li\u003e\n\u003cli\u003eMount the ControlLogix chassis inside a suitable enclosure meeting system environmental requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUL Listed Industrial Control Equipment (File E65584)\u003c\/li\u003e\n\u003cli\u003eCSA Certified Process Control Equipment (File LR54689C)\u003c\/li\u003e\n\u003cli\u003eCSA Certified Process Control Equipment for Class I, Division 2 Group A, B, C, D Hazardous Locations (File LR69960C)\u003c\/li\u003e\n\u003cli\u003eCE Compliant (EMC Directive 2004\/108\/IEC: EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2)\u003c\/li\u003e\n\u003cli\u003eC-Tick Compliant (AS\/NZS CISPR 11)\u003c\/li\u003e\n\u003cli\u003eEEx \/ ATEX Certified (Directive 94\/9\/EC, EN 60079-15 Zone 2)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695177265515,"sku":"1756-L55M24","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1756-l55m24-controllogix-controller-and-memory-board-dz1rlbn3lzf_6947a0b1-025b-4363-a71b-b0fb694fcf29.jpg?v=1766114154","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1756-l55m24-controllogix5555-controller","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}