{"product_id":"danfoss-155u2905-ehr-electronic-ramp-generator-11-30-vdc-for-electrohydraulic-control-systems","title":"Danfoss 155U2905 EHR Electronic Ramp Generator 11–30 VDC for Electrohydraulic Control Systems","description":"\u003ch4 class=\"PDq2pG_selectionAnchorContainer\"\u003eDescription\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe Danfoss 155U2905 is an EHR electronic ramp generator designed to provide smooth acceleration and deceleration signal control in electrohydraulic systems. Operating from an 11–30 VDC power supply, it generates adjustable output ramps for proportional valve control, helping reduce hydraulic shock and improve machine handling. The 155U2905 has been discontinued by the manufacturer but remains an OEM replacement module for compatible Danfoss EH control systems.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDanfoss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eControls \u0026amp; Indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155U2905\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTachometer\/Generator\/Speed Indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eElectronic Ramp Generator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEHR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer Status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiscontinued by Manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11–30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRamp Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–2.5 s (standard), up to 20 s with external capacitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRemote Control Lever or Potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-30°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eElectrohydraulic Control Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.22 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About 155U2905\u003c\/h4\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 155U2905 is a Danfoss EHR electronic ramp generator developed for mobile hydraulic applications utilizing Danfoss EH electronic control modules. It operates on an 11–30 VDC supply and processes remote control lever or potentiometer input signals to create controlled acceleration and deceleration ramps for electrohydraulic actuators. The module supports positive and negative ramp adjustment, external break contacts, and configurable ramp times, allowing precise hydraulic function control while minimizing mechanical stress on equipment. Designed for integration with Danfoss PVE proportional valve electronics, the EHR module improves machine controllability in construction, agricultural, forestry, and material handling equipment. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch1\u003e\u003cbr\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eEHR Electronic Ramp Generator: Provides controlled signal ramping for electrohydraulic systems.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e11–30 VDC Operation: Compatible with a wide range of mobile electrical systems.\u003c\/li\u003e\n\u003cli\u003eAdjustable Ramp Times: Supports standard and externally extended acceleration and deceleration ramps.\u003c\/li\u003e\n\u003cli\u003ePositive and Negative Ramp Control: Independently manages ramp characteristics for multiple control directions.\u003c\/li\u003e\n\u003cli\u003ePVE Compatibility: Designed for use with Danfoss proportional valve electronics.\u003c\/li\u003e\n\u003cli\u003eRemote Control Input: Accepts signals from remote control levers and potentiometers.\u003c\/li\u003e\n\u003cli\u003eCompact OEM Module: Integrates directly into Danfoss EH electronic control systems.\u003c\/li\u003e\n\u003cli\u003eDiscontinued OEM Product: Available for servicing existing hydraulic control installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 155U2905 delivers the reliability and precision required for smooth electrohydraulic signal ramp generation in mobile hydraulic control systems.\u003c\/p\u003e","brand":"Danfoss","offers":[{"title":"Default Title","offer_id":52165302452522,"sku":"155U2905","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_9e22c90d-a89b-419d-a6df-3bd03dcd7538.webp?v=1785848849","url":"https:\/\/iqelectro.com\/products\/danfoss-155u2905-ehr-electronic-ramp-generator-11-30-vdc-for-electrohydraulic-control-systems","provider":"IQElectro","version":"1.0","type":"link"}