{"product_id":"b-r-x20ps4951-x20-potentiometer-power-supply-module","title":"B\u0026R X20PS4951 X20 Potentiometer Power Supply Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eX20PS4951 (X20PS4951)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a specialized power supply module within the B\u0026amp;R X20 System, specifically designed to provide high-precision reference voltages for industrial potentiometers. This module features four independent output channels, each providing a stable\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$\\pm10$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eV supply to ensure accurate position or setpoint sensing. By providing a dedicated and short-circuit proof power source, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eX20PS4951\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eeliminates the need for external voltage regulators when interfacing with manual controls or displacement transducers. It is widely applied in heavy machinery control panels, test bench systems, and specialized wood or metalworking equipment where analog setpoint adjustments are required.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe module architecture is engineered to provide isolated and protected reference voltages directly from the X20 backplane.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQuad-Channel Supply:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEquipped with four separate power supply units, allowing for the simultaneous operation of multiple potentiometers from a single slice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDelivers a stable\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$\\pm10$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eV output, compatible with standard industrial potentiometers ranging from\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$1$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ek$\\Omega$ to\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$10$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ek$\\Omega$ resistance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll channels are fully short-circuit proof, preventing damage to the X20 system if field wiring is compromised or a potentiometer fails.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGalvanic Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProvides electrical isolation between the output channels and the internal system bus, ensuring that field-side electrical noise does not interfere with the PLC's logic and communication.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\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\u003eX20PS4951\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eB\u0026amp;R Industrial Automation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Supplies\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cspan class=\"math-inline\"\u003e$\\pm10$\u003c\/span\u003e V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePotentiometer Resistance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 k$\\Omega$ to 10 k$\\Omega$\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax. Load per Channel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShort-circuit Protection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Isolation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eChannel to Bus (500 V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Humidity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 to 95% (Non-condensing)\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\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I connect a potentiometer with less than 1 k$\\Omega$ resistance to this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the module is rated for a minimum resistance of\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$1$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ek$\\Omega$. Using a lower resistance would exceed the\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$20$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emA maximum load per channel, potentially triggering the internal protection or causing inaccurate voltage references.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the four channels isolated from each other?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the channels are collectively isolated from the system bus, they are not isolated from one another. They share a common reference point within the module's field-side circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary use case for the ±10 V output?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$\\pm10$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eV supply is typically used to power the outer terminals of a potentiometer, allowing the wiper to return a signal that represents the full range of motion in both positive and negative directions, which is common in joystick and center-zero applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering Installation and Wiring Standards\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTerminal Selection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe X20PS4951 requires a standard X20 12-pin terminal block (X20TB12). Ensure that the positive, negative, and common wires for each potentiometer are correctly assigned to the respective channel terminals to prevent cross-talk.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShielding for Precision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSince this module provides a reference for analog measurements, use shielded cables for the potentiometer wiring. The shield should be connected to the functional ground at the X20 shield terminal to prevent EMI from inducing \"jitter\" in the resulting analog signal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLoad Calculation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBefore commissioning, verify that the total current draw for all connected potentiometers does not exceed the module's rated\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$20$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emA per channel. For a\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$1$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003ek$\\Omega$ potentiometer at\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$10$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eV, the draw is\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$10$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emA, which is well within the safety margin.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaintenance and Diagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMonitor the module status via B\u0026amp;R Automation Studio. If a short circuit occurs on the field side, the module will indicate a fault. Once the fault is cleared, the short-circuit proof outputs will automatically resume normal operation.\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":53086375805291,"sku":"X20PS4951","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/x20ps4951-vgkzoufkwvf.png?v=1776138216","url":"https:\/\/www.plcprotech.com\/products\/b-r-x20ps4951-x20-potentiometer-power-supply-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}