{"product_id":"beckhoff-el5101-ethercat-terminal-incremental-encoder-interface","title":"Beckhoff EL5101 EtherCAT Terminal Incremental Encoder Interface","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Beckhoff \u003cstrong\u003eEL5101\u003c\/strong\u003e is a single-channel incremental encoder interface designed for high-precision position evaluation and motion monitoring applications within an EtherCAT network. It enables direct connection of incremental encoders with differential inputs (RS422) or single-ended TTL signals (hardware revision 09 or higher), serving as a fast, real-time feedback processing node for PLCs, motion controllers, and CNC systems.\u003c\/p\u003e\n\u003cp\u003eOperating as a 4-fold quadrature decoder, the module evaluates 90∘ phase-shifted square-wave signals on channels A and B, along with zero-pulse capturing on channel C. Beyond quadrature decoding, the terminal can function as a bidirectional counter on channel A, using channel B to determine direction. Two digital inputs (24 V DC) provide configurable gate and latch functionalities for locking, storing, or resetting counter values independently of process cycle speeds. A dedicated 5 V DC status input accommodates encoder alarm or status outputs.\u003c\/p\u003e\n\u003cp\u003eDesigned for cabinet integration on standard DIN rails, the \u003cstrong\u003eEL5101\u003c\/strong\u003e derives its logic power from the E-bus and passes field power through integrated 24 V DC power contacts. In enhanced operating mode (firmware 14 \/ hardware 09 onwards), it supports Distributed Clocks (DC) for system-wide synchronization with accuracy under 100 ns, wire breakage detection, edge timestamping, and period duration\/frequency measurements.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluates differential RS422 signals or single-ended 5 V TTL signals.\u003c\/li\u003e\n\u003cli\u003eSelectable 16-bit or 32-bit counter with 4-fold quadrature signal evaluation.\u003c\/li\u003e\n\u003cli\u003eIntegrates two 24 V DC digital inputs for hardware-level gate and latch functions.\u003c\/li\u003e\n\u003cli\u003eFeatures a 5 V DC status input for direct encoder alarm\/diagnostic integration.\u003c\/li\u003e\n\u003cli\u003eSupports Distributed Clocks (DC) for high-precision, sub-100 ns system synchronization.\u003c\/li\u003e\n\u003cli\u003eProvides period duration and frequency measurement capabilities with 100 ns resolution.\u003c\/li\u003e\n\u003cli\u003eIncludes built-in open-circuit (wire breakage) detection on encoder lines in enhanced mode.\u003c\/li\u003e\n\u003cli\u003eGenerates a 5 V DC encoder operating supply (up to 0.5 A) directly from field power contacts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-speed closed-loop position and velocity feedback in servo and stepper systems.\u003c\/li\u003e\n\u003cli\u003ePrecise length and speed measurement on conveyor lines and material handling equipment.\u003c\/li\u003e\n\u003cli\u003eReferencing, indexing, and mark-latching in packaging and printing machinery.\u003c\/li\u003e\n\u003cli\u003eIntegration into CNC machines, robotic axis feedback systems, and custom automation equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003eGeneral\u003c\/h4\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBeckhoff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eEL5101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eIncremental Encoder Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eapprox. 100 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x H x D)\u003c\/td\u003e\n\u003ctd\u003e24 mm x 100 mm x 68 mm (aligned width)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail (EN 60715) with locking mechanism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolycarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch4\u003eFunctional \u0026amp; Signal Processing\u003c\/h4\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTechnology\u003c\/td\u003e\n\u003ctd\u003eIncremental encoder interface (RS422 \/ TTL), counter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimit Frequency\u003c\/td\u003e\n\u003ctd\u003e1 MHz (4 million increments\/s with 4-fold evaluation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuadrature Decoder\u003c\/td\u003e\n\u003ctd\u003e4-fold evaluation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounter \/ Zero Pulse Latch\u003c\/td\u003e\n\u003ctd\u003e16-bit or 16\/32-bit switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1\/256 bit microincrements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistributed Clocks\u003c\/td\u003e\n\u003ctd\u003eSupported (in enhanced mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Synchronous Accuracy\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 100 ns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Cycle Time\u003c\/td\u003e\n\u003ctd\u003emin. 100 us\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eWire breakage detection, latch\/gate function, period \u0026amp; frequency measurement, edge timestamping, digital filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch4\u003eInputs \u0026amp; Outputs\u003c\/h4\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEncoder Inputs\u003c\/td\u003e\n\u003ctd\u003eA, \/A, B, \/B, C, \/C (RS422 differential \/ 5 V TTL single-ended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003etyp. 220 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGate \/ Latch Inputs\u003c\/td\u003e\n\u003ctd\u003e2 x 24 V DC (EN 61131-2, type 3, max. 1 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGate\/Latch Signal Voltage \"0\"\u003c\/td\u003e\n\u003ctd\u003e-3 V to +5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGate\/Latch Signal Voltage \"1\"\u003c\/td\u003e\n\u003ctd\u003e11 V to 30 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Input\u003c\/td\u003e\n\u003ctd\u003e5 V DC max. (potential-free, switching to negative potential)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEncoder Power Supply\u003c\/td\u003e\n\u003ctd\u003e5 V DC (-5% \/ +10%), max. 0.5 A (generated via 24 V DC power contacts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch4\u003eElectrical \u0026amp; Supply\u003c\/h4\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC (-15% \/ +20%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption E-Bus\u003c\/td\u003e\n\u003ctd\u003etyp. 130 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption Power Contacts\u003c\/td\u003e\n\u003ctd\u003etyp. 100 mA + sensor load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Load Power Contacts\u003c\/td\u003e\n\u003ctd\u003eImax 10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n\u003ctd\u003e500 V (E-bus \/ field potential)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch4\u003eEnvironmental \u0026amp; Compliance\u003c\/h4\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25 degC to +60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 degC to +85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e95%, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration \/ Shock Resistance\u003c\/td\u003e\n\u003ctd\u003eEN 60068-2-6 \/ EN 60068-2-27\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMC Immunity \/ Emission\u003c\/td\u003e\n\u003ctd\u003eEN 61000-6-2 \/ EN 61000-6-4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprovals \/ Markings\u003c\/td\u003e\n\u003ctd\u003eCE, UL, ATEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx Marking\u003c\/td\u003e\n\u003ctd\u003eII 3 G Ex nA IIC T4 Gc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections \/ Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eConnection Point\u003c\/th\u003e\n\u003cth\u003eSignal Function\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrack A, \/A\u003c\/td\u003e\n\u003ctd\u003eEncoder Track A differential input pair (or Single-ended A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrack B, \/B\u003c\/td\u003e\n\u003ctd\u003eEncoder Track B differential input pair (or Single-ended B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrack C, \/C\u003c\/td\u003e\n\u003ctd\u003eEncoder Track C \/ Zero pulse differential input pair (or Single-ended C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower 5 V \/ 0 V\u003c\/td\u003e\n\u003ctd\u003e5 V DC encoder power output and ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGate 24 V\u003c\/td\u003e\n\u003ctd\u003e24 V DC counter gate input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLatch 24 V\u003c\/td\u003e\n\u003ctd\u003e24 V DC counter value latch input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Input (1)\u003c\/td\u003e\n\u003ctd\u003e5 V DC status \/ encoder alarm input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShield (S)\u003c\/td\u003e\n\u003ctd\u003eCable shield connection point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure main power is isolated before installing or removing the module from the EtherCAT terminal block.\u003c\/li\u003e\n\u003cli\u003eSnap the module onto a standard 35 mm DIN rail (EN 60715) until the lock latches securely.\u003c\/li\u003e\n\u003cli\u003eVerify that the side-by-side slot and key connections align correctly with adjacent EtherCAT terminals.\u003c\/li\u003e\n\u003cli\u003eRoute encoder cabling using twisted-pair shielded cables to maintain signal integrity over long runs or in high-noise environments.\u003c\/li\u003e\n\u003cli\u003eConnect cable shielding directly to the terminal's designated shield points to protect against high-frequency interference.\u003c\/li\u003e\n\u003cli\u003eVerify encoder operating voltage requirements (5 V DC) before connecting field equipment.\u003c\/li\u003e\n\u003cli\u003ePerform a continuity check on all terminal wiring (spring-actuated cage clamps) with an appropriate screwdriver tool.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eConfiguration Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eAdd the terminal into the TwinCAT System Manager I\/O configuration (either online scan or offline ESI insertion).\u003c\/li\u003e\n\u003cli\u003eChoose between \u003cstrong\u003eNormal Operating Mode\u003c\/strong\u003e and \u003cstrong\u003eEnhanced Operating Mode\u003c\/strong\u003e (supported on FW14\/HW09 or higher) depending on requirements for Distributed Clocks, microincrements, and 32-bit counter structures.\u003c\/li\u003e\n\u003cli\u003eConfigure input signal type parameters via CoE (CAN application protocol over EtherCAT) based on whether an RS422 differential or TTL single-ended encoder is connected.\u003c\/li\u003e\n\u003cli\u003eSet up digital filter parameters in the CoE directory if operating in environments with significant electrical noise.\u003c\/li\u003e\n\u003cli\u003eSave changes to the project startup list so parameters are reloaded automatically if the module is replaced.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106536677739,"sku":"EL5101","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/Beckhoff-EL5101_002_1200x1200_ac748652-2ef5-438d-a4fc-b3619add7331.jpg?v=1787637595","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-el5101-ethercat-terminal-incremental-encoder-interface","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}