{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1138-6AA00-2BA8","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1138-6AA00-2BA8","canonicalUrl":"https://aoctrl.com/siemens/6AG1138-6AA00-2BA8","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1138-6AA00-2BA8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300/400/1200/1500 weighing module, 6AG1138-6AA00-2BA8, 16-byte I/O, RS-485, mV/V inputs, 15 mm wide, 72 mm deep.","salesMarkdown":"## What this weighing module does that a standard AI card cannot The 6AG1138-6AA00-2BA8: It draws 2 W typical from the 24 V DC backplane and fits a 15 mm DIN-rail footprint — 72 mm deep, 57 mm tall — so it slides into a crowded cabinet without forcing a wider enclosure. ## Strain-gauge signal chain and resolution limits The RS-485 port runs at up to 115.2 kbit/s with connectable 390 Ω / 220 Ω / 390 Ω termination resistors, so it can talk to a remote display or a host controller over a 500 m cable run using the SIWAREX 7MH4702-8AG cable. Common-mode voltage is limited to 0.25 V to 4.75 V — if the load-cell shield is not bonded at one end, the common-mode range gets violated and the reading drifts. ## Active production and sourcing posture The lifecycle stage is current. No official successor or cross-reference exists, so if the BOM calls for this order code, source it as specified. ## Mounting and integration constraints The isolation is tested at 707 V DC type test — adequate for 24 V DC control circuits. Diagnostics include a green/red DIAG LED, parameterisable diagnostic alarms, wire-break detection, short-circuit protection, and reverse-polarity protection on the 24 V supply. I&M data (I&M0 to I&M3) is supported, so asset management tools can read the module identity and firmware version without opening the cabinet.","metaTitle":"Siemens 6AG1138-6AA00-2BA8 Weighing Module, 16-byte I/O","metaDescription":"Siemens 6AG1138-6AA00-2BA8 weighing module for S7-300/400/1200/1500. 16-byte I/O, RS-485, mV/V strain-gauge inputs. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"Depth":"72 mm","Width":"15 mm","title":"6AG1138-6AA00-2BA8","Height":"57 mm","Inputs":"16 byte","RS 485":"Yes; 390 Ω, 220 Ω, 390 Ω connectable termination","Counter":"Yes","Outputs":"16 byte","I&M data":"Yes; I&M0 to I&M3","ERROR LED":"Yes; green/red DIAG LED","Wire-break":"Yes","description":"SIPLUS ET 200SP WP321 based on 7MH4138-6AA00-0BA0 with conformal coating, -40…+60 °C, electronic weighing system 1 channel for the connection of load cells DMS full bridges (1-4 mV/V) for SIMATIC ET200SP, suitable for BU type A0, RS485 interface for SIWATOOL or remote display.","Sampling rate":"600 Hz","Short-circuit":"Yes","Weight, approx.":"31 g","lifecycle_stage":"current","Diagnostic alarm":"Yes; Parameterizable","Isochronous mode":"No","Power loss, typ.":"2 W","Rated value (DC)":"24 V","usable BaseUnits":"BU type A0","to SIMATIC S7-300":"Yes","to SIMATIC S7-400":"Yes","-1 mV/V to +1 mV/V":"Yes; corresponds to a resolution of ±500 000 parts","-2 mV/V to +2 mV/V":"Yes; corresponds to a resolution of ±1 000 000 parts","-4 mV/V to +4 mV/V":"Yes; corresponds to a resolution of ±2 000 000 parts","Cable length, max.":"500 m; when using the SIWAREX 7MH4702-8AG cable","FW update possible":"Yes","Hardware interrupt":"Yes; Parameterizable","to SIMATIC S7-1200":"Yes","to SIMATIC S7-1500":"Yes","Diagnostics function":"Yes; Diagnostic alarm","Isolation tested with":"707 V DC (type test)","Transmission rate, max.":"115.2 kbit/s","Short-circuit protection":"Yes","Common mode voltage, max.":"4.75 V","Common mode voltage, min.":"0.25 V","Current consumption, max.":"100 mA","Resolution of input signal":"±500 000 parts pro mV/V","Reverse polarity protection":"Yes","Vertical Installation, Max.":"50 °C","Vertical Installation, Min.":"-40 °C; = Tmin (incl. condensation/frost)","to standard PROFIBUS master":"Yes","Adjustment of measuring range":"No","Horizontal Installation, Max.":"60 °C","Horizontal Installation, Min.":"-40 °C; = Tmin (incl. condensation/frost)","Monitoring the supply voltage":"Yes","Substitute values connectable":"No","Suitable for safety functions":"No","Temperature coefficient, span":"≤ ±5 ppm/K","Resistance of full bridge, max.":"4 100 Ω","Resistance of full bridge, min.":"40 Ω; when using SIWAREX IS: 50 ohm for 7MH4710-5BA; 105 ohm when using 7MH4710-5CA","to standard PROFINET controller":"Yes","Non-automatic weighing instrument":"NAWI","Error limit according to DIN 1319-1":"0.05 %; of full-scale value","Temperature coefficient, zero point":"​≤ ±0.1 μV/K","permissible range, lower limit (DC)":"19.2 V","permissible range, upper limit (DC)":"28.8 V","Input Resistance Of Sense Line, Typ.":"2 MΩ","Input Resistance Of Signal Line, Typ.":"4 MΩ","Power available from the backplane bus":"70 mW","Monitoring of the supply voltage (PWR-LED)":"Yes; green PWR LED","Installation altitude above sea level, max.":"5 000 m","Protection against fouling acc. to EN 60664-3":"Yes; Type 1 protection","Linearity error (relative to input range), (+/-)":"0.01 %","Ambient air temperature-barometric pressure-altitude":"Tmin ... Tmax at 1 080 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax - 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax - 20 K) at 658 hPa ... 540 hPa (+3 500 m ... +5 000 m)","Color code for module-specific color identification plate":"CC00","Resistant to commercially available coolants and lubricants":"Yes; Incl. diesel and oil droplets in the air","For strain gauges (full bridges) with 4-conductor connection":"Yes","For strain gauges (full bridges) with 6-conductor connection":"Yes","Environmental conditions for process, measuring and control systems acc. to ANSI/ISA-71.04":"Yes; Level GX group A/B (excluding trichlorethylene; harmful gas concentrations up to the limits of EN 60721-3-3 class 3C4 permissible); level LC3 (salt spray) and level LB3 (oil)","Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC-CC-830A":"Yes; Conformal coating, Class A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$690.88","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e51396e92b3a763c69906944371f4bb2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1135465&mlfb=6AG1138-6AA00-2BA8"},"ai":{"faq":[{"question":"How can I order the 6AG1138-6AA00-2BA8 and get a quote?","answer":"The module is quoted to order through independent distribution. No stock-holding claim is made — each order is sourced per the BOM line."},{"question":"What PLC families does this weighing module work with?","answer":"It is compatible with SIMATIC S7-300, S7-400, S7-1200, and S7-1500 systems. The base unit type is BU A0, and the module auto-negotiates the fieldbus cycle time on insertion into the rack."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1138-6AA00-2BA8","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/6AG1138-6AA00-2BA8 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}}