{"product_id":"x20dif371-16-channel-digital-input-module-sink-connection","title":"X20DIF371 16-Channel Digital Input Module (Sink Connection)","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eX20DIF371 (X20DIF371)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-density digital input module designed for the X20 System's decentralized I\/O architecture. Featuring 16 digital inputs in a compact form factor, this module utilizes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esink connections\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(NPN logic), where the input provides a path to ground for the connected sensor. Designed for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1-wire connection\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etechnology, it allows for a highly efficient and organized wiring structure within the control cabinet. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eX20DIF371\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis an ideal solution for applications requiring a high volume of digital signals, such as monitoring limit switches, pushbuttons, and proximity sensors in automated assembly lines and packaging machinery.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe hardware architecture of the X20DIF371 is optimized for signal reliability and processing efficiency. It incorporates a configurable software input filter that can be applied to the entire module, effectively eliminating signal \"chatter\" or noise from mechanical contacts. The 16 inputs are processed through the X20 backplane bus, ensuring high-speed data transmission to the CPU. The sink input design is specifically compatible with sourcing (PNP) sensors or dry contacts connected to the positive supply. Its 1-wire connection scheme means that only the signal wire is connected to the module, with the common return handled by the bus module's power distribution rail.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eX20DIF371\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eX20 System\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSink (NPN)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWiring Connection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1-wire\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eConfigurable via Software (Module-wide)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eStatus Indicators\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eI\/O Status per channel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 55 Celsius\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBus Connection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eX20 Backplane Bus\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.0 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between Sink and Source connections for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe X20DIF371 is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esink\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einput module. This means the module's input circuit \"sinks\" the current to the ground. Therefore, you must use\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esourcing (PNP)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esensors. When the sensor is triggered, it sends a high signal (+24V) to the module input.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 1-wire connection save space?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn a 1-wire configuration, each digital signal requires only a single terminal point on the X20 terminal block. The common 0V\/GND connection for the sensors is handled internally by the bus module or via a separate potential distribution module, drastically reducing the number of wires running to the I\/O rack.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I set different filter times for different inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn the X20DIF371, the software input filter is typically configured for the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eentire module\u003c\/strong\u003e. This provides a uniform debounce time for all 16 inputs, which simplifies the configuration for standard digital applications like button presses or limit switch monitoring.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSensor Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsure that all connected devices are sourcing (PNP) types. Connecting a sinking (NPN) sensor to a sinking input module will result in a \"floating\" signal that will not be registered by the PLC logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Density and Cable Management:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith 16 inputs in a single module, wire organization is key. Use the X20 System’s integrated labeling strips to identify each channel. Since this is a 1-wire module, ensure that the sensor power supply (24V) is properly distributed from a common potential terminal to avoid a \"spaghetti\" effect in the cabinet.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Tuning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen configuring the software input filter in Automation Studio, balance the response time against the noise environment. A very short filter time (e.g., 1ms) allows for high-speed detection but may trigger on electrical noise; a longer filter (e.g., 10-20ms) is safer for mechanical switches but adds latency to the signal detection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"B\u0026R","offers":[{"title":"Default Title","offer_id":53102134428011,"sku":"X20-D1F371","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/x20-d1f371-xblxbw511gf.png?v=1776138116","url":"https:\/\/www.plcprotech.com\/products\/x20dif371-16-channel-digital-input-module-sink-connection","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}