{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"Q68TD-G-H02","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"Q68TD-G-H02","canonicalUrl":"https://aoctrl.com/mitsubishi/Q68TD-G-H02","factsUrl":"https://aoctrl.com/api/mcp/products/Q68TD-G-H02","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi Q68TD-G-H02 channel-to-channel insulation thermocouple input unit, 8 channels, 0.3 °C resolution (B/R/S/N) and 0.1 °C (K/E/J/T), 16-bit signed binary output, 320 ms sampling per 8 channels, 40-pin connector.","salesMarkdown":"## What this thermocouple input module does The Q68TD-G-H02 is an 8-channel thermocouple input unit with channel-to-channel insulation, purpose-built for the Mitsubishi MELSEC Q Series PLC platform. It reads eight thermocouple inputs plus a cold-junction compensation channel, converting temperature to a 16-bit signed binary value (-2700 to 18200) that maps to the PLC's analog input registers. Resolution varies by thermocouple type: 0.3 °C for types B, R, S, and N; 0.1 °C for types K, E, J, and T. The sampling cycle is 320 ms for all eight channels, with a conversion speed of 640 ms per eight channels — the module updates the full set of readings every 640 ms. ## Isolation and wiring constraints Channel-to-channel insulation means each thermocouple input is isolated from the others by a transformer, with a withstand voltage of 1000 Vrms AC between channels for one minute. Between the thermocouple input and the PLC power supply, the insulation is also transformer-based, rated 500 Vrms AC for one minute. Insulation resistance is 10 MΩ or more at 500 VDC. External wiring connects via a 40-pin connector (A6CON1, A6CON2, or A6CON4, sold separately). The module occupies 16 I/O points (intelligent module assignment) and draws 0.65 A from the 5 V backplane supply. ## Thermocouple compatibility and diagnostics The module complies with JIS C1602-1995 and IEC 60584-1 (1995) / IEC 60584-2 (1982) thermocouple standards, covering types B, R, S, N, K, E, J, and T. Each channel has independent disconnection detection — if a thermocouple wire opens, the module flags that channel without affecting the others.","metaTitle":"Mitsubishi Q68TD-G-H02 Thermocouple Input Unit, 8 Ch","metaDescription":"Mitsubishi Q68TD-G-H02 channel-to-channel insulated thermocouple input module. 8 channels, 320 ms sampling, 0.3°C resolution (B/R/S/N), 0.1°C (K/E/J/T).","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"title":"Q68TD-G-H02","Weight":"0.22 Kg","Product No":"Q68TD-G-H02","Resolution":"B, R, S, N: 0.3 °C K, E, J, T: 0.1 °C","description":"Channel-to-channel insulation thermocouple input unit","Product type":"Channel-to-channel insulation thermocouple input unit","Scaling value":"16 bit signed binary","Sampling cycle":"320 ms / 8 channels","Shipping Weight":"1.2 Kg","lifecycle_stage":"mature","Conversion speed":"640 ms / 8 channels","Insulation method":"Between the thermocouple input channel and the sequencer power supply: Transformer insulation Thermocouple Input channel: Transformer Insulation Cold junction compensation channel to sequencer power supply: non-isolated","Withstand voltage":"Between the thermocouple input channel and the sequencer power supply: 500 Vrms AC for 1 min Between the thermocouple input channels: AC 1000 Vrms 1 min","Dimensions (LxWxH)":"13cm x 2.74cm x 10.2 cm","Number of channels":"8 channels","Estimated Lead Time":"Usually ships in 1-10 working days..","Applicable connector":"A6CON1, A6CON2, A6CON4 (sold separately)","Insulation resistance":"Between thermocouple input channel and sequencer power supply, thermocouple input channel: DC 500 V 10 MO or more","Disconnection detection":"Yes (independent for each channel)","Number of analog input points":"8 points (8 channels + cold junction compensation channel)","Number of occupied I / O points":"16 points (I / O assignment: 16 points of intelligence)","Thermocouple compliant standard":"JIS C1602-1995, IEC 60584-1 (1995), IEC 60584-2 (1982)","External wiring connection method":"40 pin connector","DC 5 V Internal current consumption":"0.65 A","Digital output Temperature measurement value":"16 bit signed binary (-2700 to 18200)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$893.00 – $1,907.92","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5534922b6a53fbda879f824cf2309f33.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What thermocouple types does Q68TD-G-H02 support?","answer":"It supports types B, R, S, N, K, E, J, and T per JIS C1602-1995 and IEC 60584-1/2. Resolution is 0.3 °C for B/R/S/N and 0.1 °C for K/E/J/T."},{"question":"What is the sampling speed of Q68TD-G-H02?","answer":"The sampling cycle is 320 ms for all 8 channels, with a conversion speed of 640 ms per 8 channels. The module updates the full set of readings every 640 ms."},{"question":"How many I/O points does Q68TD-G-H02 occupy?","answer":"It occupies 16 I/O points (intelligent module assignment) in the Q-series rack."},{"question":"What connector does Q68TD-G-H02 use?","answer":"It uses a 40-pin connector. Compatible sold-separately connectors are A6CON1, A6CON2, and A6CON4."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/Q68TD-G-H02","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/mitsubishi/Q68TD-G-H02 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}