{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"K8AC-H21PN-FLK","brand":"Omron","brandSlug":"omron","productSlug":"K8AC-H21PN-FLK","canonicalUrl":"https://aoctrl.com/omron/K8AC-H21PN-FLK","factsUrl":"https://aoctrl.com/api/mcp/products/K8AC-H21PN-FLK","rawCanonicalId":null},"summary":{"shortDescription":"Omron K8AC-H series heater element detector, order code K8AC-H21PN-FLK, input range 0.20 ~ 2.20A, solid-state outputs, RS-485 CompoWay/F, DIN rail mount, 85 ~ 264VAC supply.","salesMarkdown":"## What it catches and why it matters The Omron K8AC-H21PN-FLK is a dedicated heater element detector — it monitors the current drawn by a resistive heating load and flags a fault when the current drops outside the set window, meaning a broken heater element or a failed SSR that leaves the load unpowered. The input range of 0.20 ~ 2.20 A covers small to mid-size heaters typical in injection molding, packaging seal bars, and process ovens. ## DIN-rail integration and communication Mounts on standard DIN rail (snap-on) and terminates via spring terminals — no screw tightening, which speeds panel wiring and stays tight under vibration. The RS-485 interface uses Omron's CompoWay/F protocol, so the detector reports heater current and fault status to a PLC or HMI over a two-wire bus without running separate alarm wires back to the controller. ## Power and environment Runs on 85 ~ 264 VAC supply. The 4-digit red LED display shows the measured current in real time.","metaTitle":"Omron K8AC-H21PN-FLK Heater Element Detector, 0.20~2.20A","metaDescription":"Active-production Omron K8AC-H21PN-FLK heater element detector, 0.20~2.20A input, RS-485 CompoWay/F, DIN rail. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"Type":"Heater Element Detector","title":"K8AC-H21PN-FLK","Series":"K8AC-H","Weight":"0.441 lb (200.03 g)","Package":"Bulk","Features":"Heater Fault Detection","Input Range":"0.20 ~ 2.20A","Output Type":"Solid State (2)","description":"DETECT HEATER ELEMENT 85-264V","Display Type":"LED - Red Characters","Mounting Type":"DIN Rail","Communications":"RS-485 (CompoWay/F)","lifecycle_stage":"current","Voltage - Supply":"85 ~ 264VAC","Termination Style":"Spring Terminal","Operating Temperature":"-10°C~55°C","Number of Characters Per Row":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Does K8AC-H21PN-FLK have RS-485 communication?","answer":"Yes, it supports RS-485 using the CompoWay/F protocol, allowing the detector to report current and fault status to a PLC or HMI over a two-wire bus."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/K8AC-H21PN-FLK","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/K8AC-H21PN-FLK 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}}