{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7138-4DB01-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7138-4DB01-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7138-4DB01-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7138-4DB01-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens ET 200S, SSI absolute encoder module, 6ES7138-4DB01-0AB0, 15 mm width, 52 mm depth, 24 V DC, 0.8 W power loss.","salesMarkdown":"## SSI absolute encoder interface for ET 200S The 6ES7138-4DB01-0AB0: It occupies a single 15 mm wide slot on the terminal module, reads gray or binary code from a connected SSI encoder, and includes a trigger input to unlatch the current actual value — useful for precise length measurement at a defined event. ## Settable monoflop and cable length limits The monoflop time is configurable to 16, 32, 48, or 64 µs, but must satisfy the condition: (1/baud rate) < monoflop time < 64 µs + 2×(1/baud rate). This is a common integration constraint — ignore it and the encoder will not sync reliably. Maximum cable length depends on baud rate: 320 m at 125 kHz, 160 m at 250 kHz, 60 m at 500 kHz, 20 m at 1 MHz, and 8 m at 2 MHz, with twisted-pair shielded cable. Unshielded runs are limited to 32 m, shielded general-purpose to 50 m. ## Encoder power and input characteristics Maximum delay is 300 µs in both directions. Input type 2 accepts 2-wire proximity sensors. Group error via SF LED.","metaTitle":"Siemens 6ES7138-4DB01-0AB0 ET 200S SSI Module, 52mm Depth","metaDescription":"Active production SSI absolute encoder module for ET 200S. 15mm wide, 52mm deep, 24V DC, 0.8W. Reads gray/binary code. Sourced to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"Depth":"52 mm","Width":"15 mm","title":"6ES7138-4DB01-0AB0","Height":"81 mm","Remark":"8 byte","Functions":"Trigger for unlatching the current actual value, e.g. for length measurement","Gray code":"1","Binary code":"1","description":"SIMATIC DP, electronic module for ET 200S, 1 SSI 25BIT/1MHZ, 15 mm wide, module for connection of absolute encoders with SSI-Inteface Synchronous Serial Interface, with DI and comparator value, with clock cyclic synchronous application.","2-Wire Sensor":"Yes; Type 2","Monoflop time":"settable: 16 / 32 / 48 / 64 µs; the following restriction applies: (1/baud rate) < monoflop time of the absolute encoder < 64 µs + 2x (1/baud rate)","For Signal \"0\"":"11 V DC to 30 V DC","For Signal \"1\"":"-30 V DC to +5 V DC","Shielded, Max.":"50 m","Weight, approx.":"40 g","lifecycle_stage":"current","Power loss, typ.":"0.8 W","Rated value (DC)":"24 V","Unshielded, Max.":"32 m","At \"0\" To \"1\", Max.":"300 µs","At \"1\" To \"0\", Max.":"300 µs","For Signal \"1\", Typ.":"9 mA","Group error SF (red)":"Yes","Output current, max.":"500 mA","Absolute encoder (SSI)":"Yes","Type of output voltage":"L+ (-0.8 V)","Number of digital inputs":"1","Short-circuit protection":"Yes","Reverse polarity protection":"Yes","Cable length, shielded, max.":"320 m; 320 m at 125 kHz, 160 m at 250 kHz, 60 m at 500 kHz, 20 m at 1 MHz, 8 m at 2 MHz, twisted in pairs and shielded","Telegram length, parameterizable":"13, 21, 25 bit","from backplane bus 3.3 V DC, max.":"10 mA","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","Number of connectable encoders, max.":"1","Between The Channels And Backplane Bus":"Yes","Status indicator digital input (green)":"Yes","Between the channels and load voltage L+":"No","Status indicator forward counting (green)":"Yes","from load voltage L+ (without load), max.":"34 mA","Status indicator backward counting (green)":"Yes","For Signal \"0\", Max. (Permissible Quiescent Current)":"2 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$285.75","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e5444c2a6d45e12e1a825e1259ff12c7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=275245&mlfb=6ES7138-4DB01-0AB0"},"ai":{"faq":[{"question":"What are the physical dimensions of the 6ES7138-4DB01-0AB0?","answer":"Width 15 mm, depth 52 mm, height 81 mm. The module fits one standard ET 200S slot."},{"question":"What type of encoder does this module support?","answer":"It supports a single SSI absolute encoder with gray or binary code, programmable telegram length of 13, 21, or 25 bits. It also provides a trigger input to capture the actual value."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7138-4DB01-0AB0","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/6ES7138-4DB01-0AB0 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}}