{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1321-7RD00-4AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1321-7RD00-4AB0","canonicalUrl":"https://aoctrl.com/siemens/6AG1321-7RD00-4AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1321-7RD00-4AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIPLUS SM 1321, digital input module, 4 NAMUR inputs, -40..70 °C, ATEX II 3 G Ex nA [ib Gb], UL File E239877.","salesMarkdown":"The 6AG1321-7RD00-4AB0: The NAMUR interface supplies 8.2 V from the internal power circuit to each channel, with a no-load voltage of 10 V max and short-circuit current limited to 14.1 mA. Power output per channel is capped at 33.7 mW, keeping the loop intrinsically safe. Reverse polarity protection is built in. Channel-to-channel isolation is 60 V DC / 30 V AC in the hazardous area and 400 V DC / 250 V AC outside it — allowing mixed wiring with non-Ex circuits in the same panel. The module occupies a 40 mm wide slot on the DIN rail, 125 mm tall and 120 mm deep. It connects to the backplane via the 20-pin front connector and draws up to 80 mA from the 5 V DC bus. Typical power loss is 1.1 W. Diagnostics are readable over the backplane; a red SF group error LED and per-channel red fault indicator flash on short-circuit or wire-break. Green status LEDs confirm channel state.","metaTitle":"Siemens 6AG1321-7RD00-4AB0 SIPLUS SM 1321, 4xNAMUR, -40..70°","metaDescription":"SIPLUS SM 1321 digital input module with 4 NAMUR channels for hazardous areas. Rated -40 to 70 °C, UL/ATEX approved. In current production. Source via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"Max.":"70 °C","Min.":"-40 °C","Depth":"120 mm","Width":"40 mm","title":"6AG1321-7RD00-4AB0","Height":"125 mm","CE mark":"Yes","KC approval":"Yes","UL approval":"Yes; File E239877","description":"SIPLUS S7-300 SM 321 4DI NAMUR based on 6ES7321-7RD00-0AB0 with conformal coating, 0…+60 °C, digital input isolated 4 DI; 24 V DC, NAMUR/DIN 19234, for signals from the hazardous area, diagnostics-capable, PTB tested","ATEX marking":"ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc","NAMUR encoder":"Yes; Two-wire connection","Parameterizable":"Yes; 0.1 / 0.5 / 3 / 15 / 20 ms (plus 0.25 ms preparation time)","Weight, approx.":"230 g","lifecycle_stage":"current","Power loss, typ.":"1.1 W","Rated value (DC)":"8.2 V; from internal power circuit supply","Unshielded, Max.":"200 m","On Wire-Break, Max.":"0.1 mA","Between The Channels":"Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area","Diagnostics function":"Yes","Group error SF (red)":"Yes","EAC (formerly Gost-R)":"Yes","RCM (formerly C-TICK)":"Yes","Type of input voltage":"DC","Number of NAMUR inputs":"4","On Short-Circuit, Max.":"8.5 mA","Type of output voltage":"via the inputs","Po (power output), max.":"33.7 mW","Number of digital inputs":"4","Required Front Connector":"20-pin","Uo (no-load voltage), max.":"10 V","Module for Ex(i) protection":"Yes","Reverse polarity protection":"Yes","Channel fault indicator F (red)":"Yes","Diagnostic information readable":"Yes","from backplane bus 5 V DC, max.":"80 mA","Io (short-circuit current), max.":"14.1 mA","Between The Channels, In Groups Of":"1","Between The Channels And Backplane Bus":"Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area","Status indicator digital input (green)":"Yes","Between the channels and load voltage L+":"Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area","Co (permissible external capacity), max.":"3 µF","from load voltage L+ (without load), max.":"50 mA","Installation altitude above sea level, max.":"5 000 m","Lo (permissible external inductivity), max.":"100 mH","Input frequency (with a time delay of 0.1 ms), max.":"2 kHz","Ambient air temperature-barometric pressure-altitude":"Tmin ... Tmax at 1 140 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)","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)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/37eb2dbfe571bb2518afe090fdbddc9e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=4922&mlfb=6AG1321-7RD00-4AB0"},"ai":{"faq":[{"question":"What are the operating temperature limits?","answer":"Rated for ambient temperature from -40 °C to 70 °C."},{"question":"What approvals does this module carry?","answer":"UL (File E239877), ATEX II 3 G for hazardous areas, CE, KC, EAC, and RCM (C-TICK)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1321-7RD00-4AB0","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/6AG1321-7RD00-4AB0 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}}