{"product_id":"mitsubishi-electric-q68td-g-h01-melsec-q-series-temperature-input-module","title":"Mitsubishi Electric Q68TD-G-H01 MELSEC Q Series Temperature Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eConfigured for precise thermal monitoring, the \u003cstrong\u003eMitsubishi Electric Q68TD-G-H01\u003c\/strong\u003e delivers eight channel-isolated thermocouple inputs to high-reliability MELSEC Q Series control environments. This high-performance module is designed to eliminate ground loops and reduce noise interference in multi-point temperature measurement applications, making it highly suitable for demanding industrial processing plants. Each channel can be configured independently, allowing for versatile sensor integration across different thermocouple types within a single PLC rack footprint.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation:\u003c\/strong\u003e Complete galvanic isolation between input channels prevents ground loop electrical interference and protects sensitive control systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Type Thermocouple Support:\u003c\/strong\u003e Directly compatible with standard thermocouple types B, E, J, K, N, R, S, and T.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact System Footprint:\u003c\/strong\u003e Occupies only 16 I\/O points on the MELSEC Q base unit, conserving valuable slot space.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Diagnostics:\u003c\/strong\u003e Offers sensor wire breakage and disconnection detection to trigger immediate system alerts and prevent thermal runaway.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003ePlastic extrusion, molding, and hot runner thermal profiling.\u003c\/li\u003e\n  \u003cli\u003eHeat treatment, kilns, and annealing industrial furnace control systems.\u003c\/li\u003e\n  \u003cli\u003eMulti-zone chemical reactor vessel temperature tracking.\u003c\/li\u003e\n  \u003cli\u003eBoiler feed-water and steam temperature monitoring in utilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\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; border: 1px solid #e2e8f0;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; width: 35%;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModel Reference\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eQ68TD-G-H01\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eSeries\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eMELSEC Q Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModule Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eTemperature Input Module (Channel-Isolated)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eNumber of Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e8 channels\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eInput Sensor Types\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eThermocouple (B, E, J, K, N, R, S, T)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eOccupied I\/O Points\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e16 points (allocated as intelligent function module)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eInternal Current Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.49 A (at 5 VDC)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModule Width\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e27.4 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModule Height\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e98.0 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModule Depth\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e90.0 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.18 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.50 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe Q68TD-G-H01 offers upgraded channel-to-channel isolation compared to non-isolated temperature modules such as the standard Q64TD. When replacing older non-isolated versions, review rack power budgets, as the internal 5 VDC current consumption is significantly higher (0.49 A) due to the onboard isolation circuitry. Ensure your system's power supply module (e.g., Q61P) has sufficient remaining overhead.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo prevent measurement drift in environments subject to rapid ambient temperature fluctuations, avoid mounting the module directly adjacent to heat-producing components like power supplies or motor starters inside the enclosure. Ensure that unused input channels are software-disabled in the module parameters to prevent false sensor wire-breakage alarms and unnecessary CPU diagnostics.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eAlways use dedicated thermocouple extension and compensation cables matching the thermocouple type (e.g., KX extension wire for Type K sensors). Keep these sensor wires routed away from high-voltage AC cables and variable frequency drive outputs to minimize electromagnetic induction. Ensure shield wires are terminated at a single, clean instrumentation ground point near the PLC rack.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e Disconnect all external power sources supplying the PLC system and any field-side wiring loops before inserting or removing the module. Performing installation tasks on an energized backplane risks destroying the sensitive internal isolation optocouplers and can cause unpredictable system operations.\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; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eHook the bottom tab of the Q68TD-G-H01 module securely into the mounting slot of the MELSEC Q series base 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; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003ePivot the module flush against the base plate and tighten the top securing screw to the specified torque rating to ensure solid ground plane contact.\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; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eWire the thermocouple leads directly to the module terminals, maintaining strict attention to physical polarity indications (+ and - markings).\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; min-width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eConfigure the hardware configuration utility within your programming software (GX Works2 or GX Works3) to recognize the module and download parameter changes to the CPU.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102151631211,"sku":"Q68TD-G-H01","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/q68td-g-h01-4yntpknu1ek.png?v=1776137965","url":"https:\/\/www.plcprotech.com\/fa\/products\/mitsubishi-electric-q68td-g-h01-melsec-q-series-temperature-input-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}