{"product_id":"beckhoff-ej1957-ej-series-twinsafe-digital-input-output-plug-in-module","title":"Beckhoff EJ1957 EJ Series TwinSAFE Digital Input\/Output Plug-in Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eEngineered for high-density safety installations within automated systems, the \u003cstrong\u003eBeckhoff EJ1957\u003c\/strong\u003e functions as a high-reliability TwinSAFE plug-in module that links safe digital input and output signals directly over an EtherCAT backplane. Operating within the modular EJ design framework, this module enables machine builders to achieve compact panel configurations and rapid assembly times by mounting directly onto application-specific signal distribution boards. The unit processes standard and safety-critical signals using the \u003cstrong\u003eSafety over EtherCAT (FSoE)\u003c\/strong\u003e protocol, guaranteeing functional safety compliance up to SIL 3 and PL e levels.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Density Safe I\/O:\u003c\/strong\u003e Houses 8 safe digital inputs and 4 safe digital outputs on a single compact plug-in card.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFSoE Protocol Integration:\u003c\/strong\u003e Executes deterministic safety communications utilizing the Safety over EtherCAT protocol.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDistribution Board Mounting:\u003c\/strong\u003e Plugs directly into a custom-designed EJ-system signal distribution board, removing point-to-point wiring in mass-production machinery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRigorous Safety Compliance:\u003c\/strong\u003e Certified to meet safety levels EN ISO 13849-1:2015 (Category 4, PL e) and EN 61508:2010 (SIL 3).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiagnostic Capabilities:\u003c\/strong\u003e Internal watchdog timers and parameterized fault detection systems verify hardware health in real-time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries Machine Building:\u003c\/strong\u003e Ideal for high-volume automated equipment requiring standardized, repeatable safety configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobotic Assembly Cells:\u003c\/strong\u003e Manages safety light curtains, emergency stop circuits, and safety interlock switches.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Handling Systems:\u003c\/strong\u003e Implements zoned safety shutdown procedures on localized conveyor networks and automated guided vehicles (AGVs).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem;\"\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;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; width: 35%;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBeckhoff Automation\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;\"\u003eEJ1957\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;\"\u003eModule Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTwinSAFE EtherCAT Plug-in Module\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 Safe Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e8\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 Safe Outputs\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;\"\u003eProtocol\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTwinSAFE \/ Safety over EtherCAT (FSoE)\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;\"\u003eCurrent Consumption E-bus\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTypical 330 mA\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;\"\u003eResponse Time\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTypical 4 ms (read input \/ write to E-bus)\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;\"\u003eFault Response Time\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLess than or equal to watchdog time (parameterizable)\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;\"\u003eSafety Standards\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eEN ISO 13849-1:2015 (Cat. 4, PL e), EN 61508:2010 (SIL 3)\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 Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIP20 (when fully plugged into distribution board)\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;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eGermany\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;\"\u003e0.25 kg (including standard protective industrial packaging)\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;\"\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;\"\u003eUnlike standard Beckhoff EL-series terminals, the EJ-series plug-in modules are physical board-level components and require a matching signal distribution board (backplane). The EJ1957 serves as a consolidated board-level equivalent to utilizing separate safe input and output terminals (such as the EL1904 and EL2904) in conventional DIN-rail setups, drastically reducing point-to-point physical wiring and assembly footprint.\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;\"\u003eThe E-bus current consumption of the EJ1957 is relatively high at typical 330 mA. System engineers must carefully calculate the power budget of the distribution board's local E-bus feed. If several high-draw modules are placed in a single segment, an auxiliary power supply plug-in module must be specified to prevent communication drops or safety-loop faults under full load.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Configuration Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen configuring the EJ1957 in TwinCAT 3, ensure that the watchdog parameter is matched precisely to your system's processing cycle and network physical length. Setting the watchdog time too low may result in intermittent spurious trips (FSoE watchdog expiration errors) caused by minor fieldbus jitter, while setting it too high extends safety response times.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #9b2c2c;\"\u003eCRITICAL SAFETY WARNING\u003c\/p\u003e\n  \u003cp style=\"margin: 0.5rem 0 0 0; color: #2d3748; font-size: 0.95rem;\"\u003eDe-energize all primary, control, and auxiliary electrical supplies before inserting or extracting the plug-in card. Static-sensitive devices exist on this module; enforce strict ESD handling procedures. Failure to align coding pins prior to insertion may result in permanent mechanical damage to the distribution board contacts.\u003c\/p\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; width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748;\"\u003eEnsure the signal distribution board is securely mounted to its enclosure substrate and completely powered down.\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; width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748;\"\u003eAlign the EJ1957 guide pins with the matching keyways on the application-specific distribution board.\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; width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748;\"\u003ePress the module firmly downward until the physical lock is engaged. Verify there is no gap between the module base and the board headers.\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; width: 1.75rem; height: 1.75rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"margin: 0; color: #2d3748;\"\u003eApply bus power and configure safe communication links using TwinCAT System Manager software.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106423005547,"sku":"EJ1957","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/ej1957-rt1vqwzuaji.png?v=1776244336","url":"https:\/\/www.plcprotech.com\/ms\/products\/beckhoff-ej1957-ej-series-twinsafe-digital-input-output-plug-in-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}