{"product_id":"allen-bradley-1756-ob8ei-electronically-fused-isolated-dc-output-module","title":"Allen-Bradley 1756-OB8EI Electronically Fused Isolated DC Output Module","description":"\u003cp\u003eThe 1756-OB8EI is a high-integrity digital DC sourcing output module designed for the Allen-Bradley ControlLogix 1756 chassis platform. This module provides eight independent, galvanically isolated output channels, each equipped with integrated electronic fusing to protect against short-circuit conditions and overcurrent events. It is engineered for demanding industrial environments, including power distribution, automotive manufacturing, and water treatment, where reliable, low-latency control of field devices such as solenoids, relays, and valves is required.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEight isolated DC sourcing output channels.\u003c\/li\u003e\n\u003cli\u003eElectronic fusing per channel for rapid short-circuit protection.\u003c\/li\u003e\n\u003cli\u003ePoint-level diagnostics with +\/- 1 ms timestamp accuracy.\u003c\/li\u003e\n\u003cli\u003eSupports 10 to 30 VDC operating voltage range.\u003c\/li\u003e\n\u003cli\u003eCompatible with 1756-TBCH and 1756-TBS6H Removable Terminal Blocks (RTB).\u003c\/li\u003e\n\u003cli\u003eDesigned for single-slot installation in any ControlLogix chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is suitable for critical control applications requiring channel-to-channel isolation to prevent common-tie interference. It is commonly used to drive external field loads such as pilot lamps, buzzers, and hydraulic valves while maintaining isolation between independent DC power loops.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-OB8EI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e8 Points (Isolated\/Fused)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e10 to 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Point\u003c\/td\u003e\n\u003ctd\u003e2 Amps @ 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShort-Trip Threshold\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 4.5 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e250 V continuous (Channel-to-channel\/Backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Power\u003c\/td\u003e\n\u003ctd\u003e1.30 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the ControlLogix chassis is powered down before inserting or removing the module.\u003c\/li\u003e\n\u003cli\u003eUse a compatible 1756-TBCH or 1756-TBS6H Removable Terminal Block for field wiring.\u003c\/li\u003e\n\u003cli\u003eMaintain proper grounding practices for the chassis to ensure effective EMI protection.\u003c\/li\u003e\n\u003cli\u003eEnsure adequate ventilation within the enclosure; observe derating requirements for current based on ambient temperature.\u003c\/li\u003e\n\u003cli\u003eHandle with care to prevent electrostatic discharge (ESD) damage to the module backplane connectors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Does the 1756-OB8EI require an external power supply?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the module requires an external 24 VDC power source to drive the field loads connected to the output channels.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the purpose of the electronic fusing?\u003c\/strong\u003e\u003cbr\u003eA: The electronic fusing provides rapid, resettable protection for each channel, tripping in under 500 microseconds during an active short-circuit to prevent damage to the module and field wiring.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50988395036924,"sku":"1756-OB8EI","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_7d2add54-43b3-4057-9a33-61eb2d899274.jpg?v=1786896238","url":"https:\/\/www.electronicplc.com\/ar\/products\/allen-bradley-1756-ob8ei-electronically-fused-isolated-dc-output-module","provider":"Electronic PLC","version":"1.0","type":"link"}