{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7138-4DB02-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7138-4DB02-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7138-4DB02-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7138-4DB02-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC DP, electronic module for ET 200S, 1 SSI 25-bit absolute encoder input with digital input and comparison value, 15 mm wide, 52 mm depth, 81 mm height.","salesMarkdown":"## SSI encoder interface for ET 200S The Siemens 6ES7138-4DB02-0AB0 is a single-channel SSI absolute encoder module for the ET 200S distributed I/O system. It reads 25-bit synchronous serial interface data from one encoder and also provides one digital input with comparison value capability. The module fits a 15 mm wide slot in the ET 200S terminal block assembly and draws 0.8 W typical from the backplane bus. ## Cable length limits by clock rate Maximum shielded cable length depends on the SSI clock frequency: 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 the cable twisted in pairs and shielded. For a typical 1 MHz clock the 20 m limit is generous for most machine-mounted encoder runs, but at 2 MHz the 8 m ceiling means the encoder must be close to the cabinet. ## Digital input and sensor supply The module accepts 2-wire sensors (Type 2) with a signal '1' threshold of +11 to +30 V and a signal '0' range of -30 to +5 V. The permissible quiescent current for signal '0' is up to 2 mA. Maximum load from L+ without load is 34 mA.","metaTitle":"Siemens 6ES7138-4DB02-0AB0 ET 200S SSI Module, 15 mm","metaDescription":"Siemens 6ES7138-4DB02-0AB0 SIMATIC DP electronic module for ET 200S, 1 SSI 25-bit absolute encoder input, 15 mm wide, 0.8 W.","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":"6ES7138-4DB02-0AB0","Height":"81 mm","description":"SIMATIC DP, ELECTRONIC MODULE F. ET 200S, 1 SSI 25BIT/1MHZ 15MM WIDE MODULE FOR CONN. OF ABSOLUTE ENCODERS WITH SSI INTERFACE SYNCHRONOUS SERIAL INTERFACE WITH DI AND COMPAR. VALUE WITH CLOCK CYCLIC SYNCHRON. APP","2-Wire Sensor":"Yes; Type 2","For Signal \"0\"":"-30 to +5 V","For Signal \"1\"":"+11 to +30V","Weight, approx.":"40 g","lifecycle_stage":"current","Power loss, typ.":"0.8 W","Rated value (DC)":"24 V","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","Absolute encoder (SSI)":"Yes","Type of output voltage":"L+ (-0.8 V)","Number of digital inputs":"1","Reverse polarity protection":"Yes","Cable length, shielded, max.":"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","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":"$156.21","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=47061&mlfb=6ES7138-4DB02-0AB0"},"ai":{"faq":[{"question":"Where can I buy 6ES7138-4DB02-0AB0 and what is the price?","answer":"The 6ES7138-4DB02-0AB0 is available to order against an RFQ."},{"question":"Is 6ES7138-4DB02-0AB0 compatible with ET 200S?","answer":"Yes, the 6ES7138-4DB02-0AB0 is a SIMATIC DP electronic module specifically designed for the ET 200S distributed I/O system. It occupies a 15 mm wide terminal block slot."},{"question":"How to configure SSI with 6ES7138-4DB02-0AB0?","answer":"The module reads 25-bit absolute encoder data via the synchronous serial interface. The SSI clock frequency and cable length must be matched per the 125 kHz to 2 MHz range, with twisted-pair shielded cable. The module also provides a digital input and comparison value function."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7138-4DB02-0AB0","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/6ES7138-4DB02-0AB0 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}}