{"product_id":"schneider-electric-stbddi3420-modicon-stb-4-channel-digital-input-module","title":"Schneider Electric STBDDI3420 Modicon STB 4-Channel Digital Input Module","description":"\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  Optimized for distributed control topologies, the \u003cstrong\u003eSchneider Electric STBDDI3420\u003c\/strong\u003e provides four discrete channels of 24VDC sink input capability within the Modicon STB decentralized I\/O platform. This module interfaces directly with 3-wire proximity sensors and limit switches, delivering a highly responsive \u003cstrong\u003e0.5 ms configurable input filter\u003c\/strong\u003e to capture rapid state transitions in high-speed automation environments. Integrated short-circuit protection safeguards the internal electronics and field wiring against localized electrical faults, minimizing system-wide downtime.\n\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem;\"\u003eKey Technical Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFour Discrete Input Channels:\u003c\/strong\u003e Configured for 24VDC sink logic (IEC 61131-2 Type 1 compatibility).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3-Wire Interface:\u003c\/strong\u003e Supports direct connection of PNP\/sink-type field sensors without external distribution terminals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfigurable Filter Time:\u003c\/strong\u003e Adjustable down to 0.5 ms for high-speed signal processing and noise rejection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort-Circuit Protection:\u003c\/strong\u003e Electronic protection per channel with automatic reset once the fault condition is cleared.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHot-Swappable Operation:\u003c\/strong\u003e Allows module replacement under power without disrupting the rest of the Modicon STB island.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem;\"\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomated Assembly Lines:\u003c\/strong\u003e High-speed part detection, limit switching, and pneumatic cylinder position feedback.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Handling \u0026amp; Conveyors:\u003c\/strong\u003e Sorting systems, optical sensor arrays, and safety gate monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaging Machinery:\u003c\/strong\u003e Registration mark sensing and rapid product indexing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater \u0026amp; Wastewater Telemetry:\u003c\/strong\u003e Level switch integration and valve position monitoring in distributed pump stations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSchneider Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSTBDDI3420\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eProduct Series\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eModicon STB (Advantys)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eInput Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDiscrete Sink (3-Wire)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eNumber of Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eNominal Input Voltage\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e24VDC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eConfigurable Response Time\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.5 ms (minimum \/ default)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eProtection Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eShort-circuit and overload protection\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eProduct Phase\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003ePhase-Out (Legacy Maintenance Spare)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCommodity Code\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e85371099\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.01 kg;\"\u003e0.01 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.15 kg (including protective packaging)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e130 mm x 70 mm x 20 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem;\"\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eTerminal Pin\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eSignal Assignment\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e1\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIN1\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDigital Input Channel 1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIN2\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDigital Input Channel 2\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e3\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIN3\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDigital Input Channel 3\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e4\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIN4\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDigital Input Channel 4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e5 \/ 6\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e+24VDC Sensor Out\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSensor power distribution terminals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e7 \/ 8\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0VDC Common\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eCommon return path for 3-wire sensors\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem;\"\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  The STBDDI3420 is a legacy component of the Advantys STB platform. When replacing this module, ensure that the existing base unit (typically STBXTS1100 screw type or STBXTS2100 spring clamp type) is free of corrosion. If migrating complete islands to newer architectures, consider the Modicon TM3 or X80 I\/O families, which offer direct functional equivalents but require different physical footprints and configuration software.\n\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  A common failure point in distributed STB islands is exceeding the sensor power bus current limit. While the STBDDI3420 features short-circuit protection, the total current drawn by all connected 3-wire sensors must not exceed the rating of the upstream STB Power Distribution Module (PDM). If using high-draw proximity sensors, calculate the cumulative current and, if necessary, inject auxiliary power using an additional STBPDT3100 module.\n\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  When configuring the input filter via the Advantys Configuration Software, setting the filter to its minimum 0.5 ms threshold makes the input highly sensitive to transient electrical noise. In environments with heavy variable frequency drive (VFD) activity, use shielded cabling for sensor lines and ensure the STB mounting rail is solidly bonded to the functional earth (FE) ground plane.\n\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 0.5rem;\"\u003eCRITICAL WARNING: ELECTRICAL HAZARD\u003c\/strong\u003e\n  \u003cspan style=\"color: #9b2c2c;\"\u003e\n    Disconnect all power sources before inserting or removing modules from the STB island. Failure to de-energize the field-side power distribution bus can result in localized arcing, damage to adjacent I\/O modules, or unexpected machine movement.\n  \u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eVerify that the STB base unit is securely snapped onto the DIN rail and that the keying pins match the STBDDI3420 module configuration.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eAlign the module with the base guide rails and slide it downward until the locking latch clicks firmly into place.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eConnect the field wiring to the removable terminal block according to the 3-wire sink pinout diagram, ensuring correct polarity of the 24VDC sensor supply.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eApply power to the Network Interface Module (NIM) and perform an auto-configuration scan to register the new module within the active I\/O map.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":53104564863339,"sku":"STBDDI3420","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/stbddi3420-1e2l3gb2we4.png?v=1776163500","url":"https:\/\/www.plcprotech.com\/products\/schneider-electric-stbddi3420-modicon-stb-4-channel-digital-input-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}