{"product_id":"safety-i-o-modules-allen-bradley-1791ds-ib8xobv4","title":"Safety I\/O Modules | Allen-Bradley 1791DS-IB8XOBV4","description":"\u003cp\u003eThe \u003cstrong\u003e1791DS-IB8XOBV4\u003c\/strong\u003e is a 24 VDC DeviceNet Safety combination I\/O block in the Allen-Bradley CompactBlock Guard I\/O family. Designed for distributed safety control applications, it integrates 8 safety inputs, 8 test pulse outputs, and 4 solid-state dual-channel bipolar safety outputs into a compact housing. The module communicates using the CIP Safety protocol over DeviceNet Safety networks to achieve SIL 3 (IEC 61508) and Category 4 \/ PLe (ISO 13849-1) compliance.\u003c\/p\u003e\n\u003ch3\u003eSafety Input and Bipolar Output Architecture\u003c\/h3\u003e\n\u003cp\u003eThe input section of the \u003cstrong\u003e1791DS-IB8XOBV4\u003c\/strong\u003e features 8 current-sinking safety inputs configurable for single- or dual-channel safety devices such as e-stops, safety switches, and light curtains. 8 dedicated test pulse outputs supply field contact power while injecting low-duration test pulses to detect short-circuits to 24 VDC and cross-faults. On the output side, 4 solid-state bipolar outputs pair current-sourcing (P-side) and current-sinking (M-side) switches per channel, providing short-circuit protection and reliable line fault detection for safety actuators.\u003c\/p\u003e\n\u003ch3\u003eDeviceNet Safety Communication and Field Setup\u003c\/h3\u003e\n\u003cp\u003eDeviceNet Safety integration enables seamless exchange of safety input\/output status, configuration settings, and detailed diagnostic information over a single network trunkline. Safety Network Numbers (SNN) and node address assignments are configured using DeviceNet configuration tools or RSNetWorX for DeviceNet. The module mounts on a standard 35 mm DIN rail and features removable terminal blocks alongside front-panel LEDs for power, network status, module health, and individual channel status.\u003c\/p\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\u003e1791DS-IB8XOBV4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDeviceNet Safety CompactBlock I\/O Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eCompactBlock Guard I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Level\u003c\/td\u003e\n\u003ctd\u003eSIL 3 (IEC 61508), PLe (ISO 13849-1), Cat 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Inputs\u003c\/td\u003e\n\u003ctd\u003e8 sinking inputs (24 VDC nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTest Pulse Outputs\u003c\/td\u003e\n\u003ctd\u003e8 test outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Outputs\u003c\/td\u003e\n\u003ctd\u003e4 solid-state dual-channel bipolar outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eCIP Safety over DeviceNet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC (11 to 28.8 VDC range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.84 lbs (0.38 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the bipolar output configuration on the 1791DS-IB8XOBV4 protect output loads? A: Bipolar outputs control both the 24 VDC sourcing side and the 0 VDC sinking side of the load simultaneously. If a short circuit to power or ground occurs on either leg, the module opens the opposite side to safely interrupt power to the connected device.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 8 test outputs be used as standard control outputs? A: No, the 8 test pulse outputs are specifically designed to power safety field contacts and generate pulse signals for short-circuit detection; they cannot be used as general-purpose control outputs.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67049008463987,"sku":"1791DS-IB8XOBV4","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1791ES-IB8XOBV42_Cocoai.jpg?v=1793259187","url":"https:\/\/www.dcssupplier.com\/ar\/products\/safety-i-o-modules-allen-bradley-1791ds-ib8xobv4","provider":"DcsSupplier Limited","version":"1.0","type":"link"}