{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1688-3XY38-2AX0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1688-3XY38-2AX0","canonicalUrl":"https://aoctrl.com/siemens/6AG1688-3XY38-2AX0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1688-3XY38-2AX0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIPLUS HMI design empty front in KP8 format, order code 6AG1688-3XY38-2AX0, conformal coated, -40…+60 °C operating, IP65 front / IP20 rear, 5 slots for 22.5 mm operator controls.","salesMarkdown":"The Siemens 6AG1688-3XY38-2AX0 is a SIPLUS HMI design empty front in KP8 format — essentially a ruggedized enclosure bezel and housing for building a custom operator panel. It carries conformal coating and is based on the standard 6AV3688-3XY38-3AX0, extended for the -40…+60 °C operating range (storage to +80 °C). This is not a display or a controller; it is the mechanical front end that accepts up to five standard 22.5 mm command devices (pushbuttons, selector switches, pilot lights) and integrates into the Siemens pro device extension units. Rated IP65 at the front and IP20 at the rear, it withstands washdown splashes from the panel face while the rear remains protected inside the enclosure. The aluminum housing (no plastic, no stainless steel) gives it a solid feel and good thermal conduction for the -40…+80 °C storage span. The -40 °C minimum and +80 °C maximum storage range cover freezer-to-oven extremes, but the operating limits depend on mounting orientation. For vertical installation the maximum ambient is 60 °C; at maximum tilt angle (180° to the front/rear) it is also 60 °C. The -40 °C minimum holds for both orientations. Startup is rated from -25 °C. These numbers mean the unit can live in a refrigerated warehouse or a hot foundry control cabinet — as long as the panel interior stays within the 60 °C ceiling during operation. The conformal coating protects the electronics against condensation and corrosive atmospheres — a common requirement in food processing, chemical dosing, or outdoor kiosks where the panel interior sees humidity swings. ## Safety function suitability The part is marked suitable for safety functions, specifically for installation of emergency stop devices. This means the mechanical mounting and the IP65 front face meet the ingress and structural requirements for a safety-rated operator station. It does not itself contain safety logic — that comes from the e-stop pushbutton and the safety relay or PLC that reads it. The empty front gives you a certified mechanical platform to build a guarded operator interface. ## Mounting and mechanical integration Front mounting only — no DIN rail, no rack, no wall-mount option. The cutout in the mounting plate is 68 mm wide by 129 mm high, with a plate thickness of 2 to 6 mm. The housing front measures 155 mm high by 98 mm wide, overall depth 49 mm. Clamp terminals handle the wiring. Portrait and landscape orientations are both supported, and mounting position is unrestricted (any). The five slots accept standard 22.5 mm operator controls — pushbuttons, selector switches, key switches, pilot lights.","metaTitle":"Siemens 6AG1688-3XY38-2AX0 SIPLUS HMI Empty Front, -40…+80 °","metaDescription":"Siemens 6AG1688-3XY38-2AX0 SIPLUS HMI empty front in KP8 format. Active production. IP65 front, IP20 rear. -40 to +80 °C range. Conformal coated. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["HMI Operator Interfaces"],"specifications":{"Max.":"80 °C","Min.":"-40 °C","title":"6AG1688-3XY38-2AX0","Plastic":"No","Aluminum":"Yes","IP (rear)":"IP20","description":"SIPLUS HMI design empty front in KP8 format based on 6AV3688-3XY38-3AX0 with conformal coating, -40…+60 °C, start up -25 °C, design empty front in KP8 format for easy mounting of standard 22.5 mm operator controls, ideal for the setup of modular operator panels; also suitable for installation in extension units of the pro devices","Mounting type":"Clamp terminals","Overall depth":"49 mm","Rack mounting":"No","Rail mounting":"No","Front mounting":"Yes; Compatible with Extension Units dimensions","Stainless steel":"No","lifecycle_stage":"current","IP (at the front)":"IP65","Mounting position":"any","Mounting cutout, width":"68 mm; Max. thickness of mounting plate 2 - 6 mm","Height of housing front":"155 mm","Mounting cutout, height":"129 mm","Key and signal lamp test":"No","Number of USB interfaces":"0","Design of the power supply":"external","Weight (without packaging)":"240 g","Width of the housing front":"98 mm","At maximum tilt angle, max.":"60 °C; = Tmax","At maximum tilt angle, min.":"-40 °C; = Tmin","Enclosure Type 4 at the front":"No","Suitable for safety functions":"Yes; e.g. installation of emergency stop","Wall mounting/direct mounting":"No","Enclosure Type 4x at the front":"No","For vertical installation, max.":"60 °C; = Tmax","For vertical installation, min.":"-40 °C; = Tmin","Mounting in portrait format possible":"Yes","Mounting in landscape format possible":"Yes","Number of slots for command devices and signaling units":"5; Max. 5 possible","Maximum Permissible Angle Of Inclination Without External Ventilation":"180°; To the front/rear"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$477.22","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ed344a426375e435351c88fb23de1deb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621177&mlfb=6AG1688-3XY38-2AX0"},"ai":{"faq":[{"question":"What is the operating temperature range for 6AG1688-3XY38-2AX0?","answer":"Operating range is -40…+60 °C (vertical installation or at maximum tilt). Storage range extends to +80 °C. Startup from -25 °C is rated."},{"question":"Can 6AG1688-3XY38-2AX0 be used for safety functions?","answer":"Yes, it is marked suitable for safety functions, including installation of emergency stop devices. The empty front provides the mechanical platform; the safety function itself depends on the operator device and the downstream safety circuit."},{"question":"What is the IP rating of this empty front?","answer":"IP65 at the front (washdown-protected face) and IP20 at the rear (protected inside the enclosure)."},{"question":"Where can I buy 6AG1688-3XY38-2AX0?","answer":"This part is sourced to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1688-3XY38-2AX0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6AG1688-3XY38-2AX0 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}}