{"product_id":"omron-cj1w-ad042-cj-series-analog-input-module","title":"Omron CJ1W-AD042 CJ Series Analog Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDesigned for high-speed, high-resolution data acquisition within industrial control architectures, the Omron CJ1W-AD042 provides four high-performance analog input channels in a compact CJ-series form factor. This high-density Special I\/O Unit supports multiple voltage and current input ranges with high accuracy, executing A\/D conversion in as fast as 20 microseconds per point. Integrated digital isolation between the I\/O bus and the controller backplane protects internal CPU logic from field-side electrical noise, making it an excellent choice for demanding process control, loop regulation, and signal monitoring applications.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFour High-Resolution Channels:\u003c\/strong\u003e Configurable for voltage (1 to 5 V, 0 to 10 V, -5 to 5 V, -10 to 10 V) or current (4 to 20 mA) inputs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Fast Conversion Cycle:\u003c\/strong\u003e Converts signals at speeds of 20 microseconds for 1 point, scaling up to 35 microseconds for all 4 points.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e16-Bit Resolution:\u003c\/strong\u003e High-precision conversion ensures micro-level signal granularity for critical processes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced Signal Processing:\u003c\/strong\u003e Built-in scaling functions (up to plus\/minus 32,000), peak value holding, and mean-value buffer processing (up to 512 samples).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisconnection Detection:\u003c\/strong\u003e Automatically flags open-circuit faults on 1 to 5 V and 4 to 20 mA signal runs to prevent process errors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetachable Terminal Block:\u003c\/strong\u003e Features an 18-point detachable M3 screw terminal block for simplified wiring and fast module replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eChemical and petrochemical process loop monitoring\u003c\/li\u003e\n  \u003cli\u003ePumping station and water treatment pressure tracking\u003c\/li\u003e\n  \u003cli\u003eHigh-speed manufacturing thermal logging and oven control\u003c\/li\u003e\n  \u003cli\u003eHydraulic and pneumatic pressure feedback systems\u003c\/li\u003e\n  \u003cli\u003eFactory automation SCADA\/HMI telemetry acquisition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\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: 8px; font-weight: bold; color: #1a365d;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 8px; font-weight: bold; color: #1a365d;\"\u003eValue \/ Specification\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: 8px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eOmron\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eModule Model\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eCJ1W-AD042\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eUnit Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eCJ-Series Special I\/O Unit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eNumber of Analog Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e4 points\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eInput Signal Ranges (Voltage)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e1 to 5 V, 0 to 10 V, -5 to 5 V, -10 to 10 V\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eInput Signal Ranges (Current)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e4 to 20 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eMaximum Rated Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eVoltage: plus\/minus 15 V | Current: plus\/minus 30 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eInput Impedance\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eVoltage Input: 1 MOhm min. | Current Input: 250 Ohm (rated)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eResolution\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e16-bit binary conversion\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eAccuracy (at 25 degC)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eVoltage: plus\/minus 0.2% of F.S. | Current: plus\/minus 0.4% of F.S.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eAccuracy (0 to 55 degC)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eVoltage: plus\/minus 0.4% of F.S. | Current: plus\/minus 0.6% of F.S.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eA\/D Conversion Cycle\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e20 us (1 point), 25 us (2 points), 30 us (3 points), 35 us (4 points)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eIsolation\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eDigital isolator between I\/O and Controller (No channel-to-channel isolation)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003ePower Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e520 mA max. at 5 VDC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003ePhysical Dimensions\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e31 mm (W) x 90 mm (H) x 65 mm (D)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eNet Module Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e150 g max.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e0.35 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eJapan\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.25rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe module offers backward compatibility with older CJ-series systems, though Direct Conversion via the \u003ccode\u003eAIDC\u003c\/code\u003e instruction is limited. This direct execution feature is strictly supported on CJ2H-CPU (unit version 1.1 or later) and CJ2M-CPU units. Standard CJ1, NJ501, and CP1H CPU controllers must access analog data via normal cyclic refreshing cycles rather than direct I\/O execution instructions.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.25rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThis module uses a shared common configuration; there is no channel-to-channel physical isolation. If field transmitters are powered from different, non-isolated power sources, ground loops can develop, leading to measurement drift or hardware damage. Ensure all current loop transmitters are either loop-powered from a single clean supply or use external signal isolators prior to landing wiring on the terminal block.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.25rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo minimize high-frequency electromagnetic interference, use shielded twisted-pair (STP) cabling for all signal runs. Connect the cable shields to a single-point system ground plate near the control panel entry, leaving the field end of the shield floating. When wiring, maintain the correct torque on the M3 terminals (0.5 N-m) to prevent signal loss from loose terminations.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #9b2c2c;\"\u003eCRITICAL WARNING:\u003c\/p\u003e\n  \u003cp style=\"margin: 0; color: #9b2c2c;\"\u003eAlways disconnect and isolate the main system power supply and any external 24 VDC transmitter loops before mounting or extracting the analog module. Installing modules onto an energized backplane can cause transient voltage spikes, resulting in damage to the internal ASIC or the CPU backplane.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748; padding-top: 2px;\"\u003eAlign the upper and lower catches of the CJ1W-AD042 module with the mating connectors on the adjacent CJ-series module or backplane unit.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748; padding-top: 2px;\"\u003ePress the module firmly in place until the yellow locking sliders at the top and bottom click into the locked position.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748; padding-top: 2px;\"\u003eVerify that the module address rotary switches (MACH No.) on the front panel are configured to a unique, non-conflicting slot ID.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748; padding-top: 2px;\"\u003eSecure the terminal block, land the shielded wires, and turn on the controller power to execute standard diagnostic self-tests.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":53077930344811,"sku":"CJ1W-AD042","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/CJ1W-AD042-mvyv15tikah.png?v=1775733491","url":"https:\/\/www.plcprotech.com\/tr\/products\/omron-cj1w-ad042-cj-series-analog-input-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}