{"product_id":"allen-bradley-1747-l542-slc-500-slc-5-04-processor-module","title":"Allen-Bradley 1747-L542 SLC 500 SLC 5\/04 Processor Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1747-L542\u003c\/strong\u003e is a modular programmable logic controller processor unit belonging to the \u003cstrong\u003eSLC 500\u003c\/strong\u003e system family. Operating as an \u003cstrong\u003eSLC 5\/04\u003c\/strong\u003e processor, this device executes user-defined control logic programs, services system I\/O modules, and manages multi-node communications across automated industrial environments. The unit features built-in Data Highway Plus (DH+) and configurable RS-232 communication channels, enabling direct integration into supervisory control systems, distributed networks, and operator interface terminals.\u003c\/p\u003e\n\u003cp\u003eDesigned for installation in slot 0 of a standard 1746 modular chassis, the \u003cstrong\u003e1747-L542\u003c\/strong\u003e provides high-speed bit execution, expansive I\/O addressing capacity, and non-volatile memory backup capabilities. The processor continuously executes an operating cycle consisting of input scanning, program execution, output updating, communication servicing, and overhead processing to maintain precise system control.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e32 K words user-configurable memory capacity for program and data file storage\u003c\/li\u003e\n\u003cli\u003eIntegrated Data Highway Plus (DH+) Channel 1 communication port supporting high-speed peer-to-peer messaging\u003c\/li\u003e\n\u003cli\u003eConfigurable RS-232 Channel 0 port supporting DF1 Full-Duplex, DF1 Half-Duplex, DH-485, ASCII, DF1 Radio Modem, and Modbus RTU Master protocols\u003c\/li\u003e\n\u003cli\u003eHardware keyswitch providing RUN, PROGRAM (PROG), and REMOTE (REM) mode selection\u003c\/li\u003e\n\u003cli\u003eFront-panel status LEDs for monitoring power, CPU fault, battery status, forced I\/O, and communication activity\u003c\/li\u003e\n\u003cli\u003eSupport for optional Flash EPROM memory backup modules (1747-M13)\u003c\/li\u003e\n\u003cli\u003eHigh-speed instruction execution rate of 0.37 us for basic XIC bit instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFactory automation and machine control systems\u003c\/li\u003e\n\u003cli\u003eSCADA remote terminal unit (RTU) stations and data acquisition\u003c\/li\u003e\n\u003cli\u003eMaterial handling and conveyor systems\u003c\/li\u003e\n\u003cli\u003eProcess control and distributed PLC networks using Data Highway Plus (DH+)\u003c\/li\u003e\n\u003cli\u003ePumping stations and water\/wastewater treatment monitoring\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\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1747-L542\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \/ Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSLC 5\/04 Processor (SLC 500 System)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUser Memory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Discrete I\/O Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4096 inputs \/ 4096 outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Local System Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 chassis \/ 30 slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProgramming Instructions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e107\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical Scan Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.9 ms\/K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBit Execution (XIC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.37 us\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProgramming Software\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRSLogix 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Loading at 5V DC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Loading at 24V DC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 mA (200 mA for units manufactured prior to April 2002)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProgram Scan Hold-Up Time After Loss of Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 ms to 3 s (dependent on power supply loading)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNoise Immunity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNEMA Standard ICS 2-230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVibration - Displacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.015 in. peak-to-peak at 5 to 57 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVibration - Acceleration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 g at 57 to 2000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Shock\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\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\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\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\u003e\u003cstrong\u003eHumidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 to 95% without condensation\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\u003e\n\u003cstrong\u003eChassis Mounting:\u003c\/strong\u003e Mount the processor exclusively into the leftmost slot (Slot 0) of an SLC 500 1746 chassis. Ensure system power is disconnected before insertion or removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure and Cooling:\u003c\/strong\u003e Install the modular system inside a suitably rated NEMA\/IP enclosure located in a Pollution Degree 2 industrial environment. Maintain at least 10.2 cm (4 in.) of clearance around the chassis for proper convection airflow and cable bend radius.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Ensure the 1746 chassis is solidly grounded to the enclosure backpanel using copper braid or 5.2 mm2 (10 AWG) copper wire connected to a central ground bus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Backup:\u003c\/strong\u003e Verify that the backup lithium battery (Catalog Number 1747-BA) is connected to the motherboard before inserting the processor module into the chassis to retain RAM memory during power loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring and Communication Cables:\u003c\/strong\u003e Route communication lines (DH+ blue hose and RS-232 serial cables) away from high-voltage power wiring and noise-generating inductive loads.\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\u003c\/li\u003e\n\u003cli\u003eC-UL Listed Industrial Control Equipment for use in Canada\u003c\/li\u003e\n\u003cli\u003eUL Listed Industrial Control Equipment for use in Class I, Division 2, Hazardous Locations Groups A, B, C, or D\u003c\/li\u003e\n\u003cli\u003eCE compliant for all applicable directives (EMC Directive 89\/336\/EEC and Low Voltage Directive 73\/23\/EEC)\u003c\/li\u003e\n\u003cli\u003eC-Tick marked for all applicable acts\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695182541163,"sku":"1747-L542","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1747-l542-slc-5-04-32k-controller-c3qkwna1vbh_9692c3c0-1c33-488a-8610-4c068d113f4f.jpg?v=1766114344","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1747-l542-slc-500-slc-5-04-processor-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}