{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7138-4DB030","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7138-4DB030","canonicalUrl":"https://aoctrl.com/siemens/6ES7138-4DB030","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7138-4DB030","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC DP, Electronics module for ET 200S, 6ES7138-4DB030, 24 V encoder supply, SSI absolute-encoder input, monoflop 16/32/48/64 µs, ships in 1 - 10 working days.","salesMarkdown":"## What the slice does The Siemens 6ES7138-4DB030 is a SIMATIC DP electronics module for ET 200S that reads an SSI absolute encoder and returns its position word to a PROFIBUS-DP master. It is a single-width slice, 1.5 x 8.1 x 5.2 cm, that drops into an ET 200S rack beside the standard power and interface modules. The 24 V encoder supply is fed out to the transducer and the module reports short-circuit protection on that output, so a wiring fault on the field side will not collapse the backplane. ## Timing, cable reach, and the specs that actually govern fit The position-decode window is set by the monoflop time, selectable at 16/32/48/64 µs, and that figure plus the 125 kHz SSI rate cap the maximum shielded cable length at 320 m. The supply rail tolerates the L+ drop-out to L+ (-0.8 V), so derate the panel-side 24 V budget by that margin when more than one slice shares a feed. Power dissipation is 1 W typical, which is what to enter into the ET 200S thermal calculation for the station. ## Sourcing posture and lifecycle Hold one in the cabinet for any ET 200S station that depends on it — an SSI slice failure does not give the operator a graceful fallback, and the encoder stops reporting position until the module is swapped.","metaTitle":"Siemens 6ES7138-4DB030 ET 200S SSI Module, 24 V","metaDescription":"Siemens 6ES7138-4DB030 SIMATIC DP electronics module for ET 200S, SSI absolute encoder, 24 V supply, monoflop 16/32/48/64 µs. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"title":"6ES7138-4DB030","Product No.":"6ES7138-4DB030","description":"SIMATIC DP, Electronics module for ET 200S","Product type":"SIMATIC DP, Electronics module for ET 200S","Monoflop time":"16/32/48/64 µs","Encoder supply":"24 V","Shipping Weight":"1.5Kg","lifecycle_stage":"current","Power loss, typ.":"1 W","Dimensions WxHxD cm":"1.5 x 8.1 x 5.2 cm","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Absolute encoder (SSI)":"Yes","Type of output voltage":"L+ (-0.8 V)","Short-circuit protection":"Yes","Cable length, shielded, max.":"320 m; At 125 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$745.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e5444c2a6d45e12e1a825e1259ff12c7.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will 6ES7138-4DB030 drop into a panel specified around 6ES7321-1BH02-4AA0?","answer":"No. 6ES7321-1BH02-4AA0 is an SM321 digital-input module; the 6ES7138-4DB030 is an SSI position-decode slice. They are not slot-interchangeable and require different station configuration."},{"question":"What encoder supply and timing does the 6ES7138-4DB030 provide?","answer":"Encoder supply is 24 V with short-circuit protection, and the monoflop decode window is selectable at 16/32/48/64 µs, with shielded cable reach up to 320 m at 125 kHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7138-4DB030","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/6ES7138-4DB030 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}}