{"product_id":"allen-bradley-1791es-ib8xobv4-digital-i-o-cards","title":"Allen-Bradley 1791ES-IB8XOBV4 Digital I\/O Cards","description":"\u003cp\u003eConfigured for safety-critical discrete input monitoring and output actuation in EtherNet\/IP networks, the \u003cstrong\u003eAllen-Bradley 1791ES-IB8XOBV4\u003c\/strong\u003e (\u003cstrong\u003e1791ES-IB8XOBV4\u003c\/strong\u003e CompactBlock Guard Safety I\/O Module) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1791ES-IB8XOBV4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.10 lbs (0.50 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard CompactBlock Guard I\/O profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Allen-Bradley industrial operating range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eStandard 24 VDC auxiliary power draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eSafety Digital I\/O Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e8 isolated safety inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e4 dual-channel safety outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e250 mA max per output point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Network\u003c\/td\u003e\n\u003ctd\u003eEtherNet\/IP (CIP Safety)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and CIP Safety Network Determinism\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1791ES-IB8XOBV4 utilizes CIP Safety protocol over EtherNet\/IP deterministic networks to execute real-time safety functions without requiring dedicated hardwired safety buses. Internal cross-checking diagnostics and dual-channel output drivers evaluate safety loop status continuously, ensuring deterministic fail-safe response times during emergency stop or light curtain trips. Featuring firmware flash compatibility and high-density I\/O integration, the module executes internal self-tests to detect short circuits, cross-faults, and wire breaks before switching safety outputs.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What communication protocol is used by the 1791ES-IB8XOBV4 safety block?\u003c\/p\u003e\n\u003cp\u003eA: The module communicates over standard EtherNet\/IP networks utilizing CIP Safety messaging layers for fail-safe data exchange with GuardLogix safety controllers.\u003c\/p\u003e\n\u003cp\u003eQ: How are the safety outputs structured on the 1791ES-IB8XOBV4 module?\u003c\/p\u003e\n\u003cp\u003eA: The module provides 4 dual-channel safety outputs rated for up to 250 mA per channel at 24 VDC, designed for direct actuation of safety contactors and control devices.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSecure the 1791ES-IB8XOBV4 module onto the control panel DIN rail or mounting plate using appropriate hardware.\u003c\/li\u003e\n\u003cli\u003eConnect the 24 VDC field power supply lines to the designated power terminals, verifying correct DC polarity before energizing the system.\u003c\/li\u003e\n\u003cli\u003eTerminate safety field input and output wiring using shielded conductors, ensuring wire shields are grounded at the central panel earthing point.\u003c\/li\u003e\n\u003cli\u003eRoute EtherNet\/IP communication cables and 24 VDC safety signal wiring in dedicated wire trays separated from high-voltage AC conductors and motor drives.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52790059729176,"sku":"1791ES-IB8XOBV4","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1791ES-IB8XOBV42_Cocoai.jpg?v=1790734093","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1791es-ib8xobv4-digital-i-o-cards","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}