{"product_id":"allen-bradley-1791ds-ib8xob8-guard-i-o-16-point-digital-combination-module","title":"Allen-Bradley 1791DS-IB8XOB8 Guard I\/O 16 Point Digital Combination Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1791DS-IB8XOB8\u003c\/strong\u003e is a distributed hardware block engineered for \u003cstrong\u003eDeviceNet Safety\u003c\/strong\u003e architectures deploying the \u003cstrong\u003eCIP Safety\u003c\/strong\u003e protocol. Operating as a decentralized station on standard networks, this solid-state block delivers functional safety interface management by encoding and decoding deterministic safety-state variables close to production field instrumentation. By providing built-in microcontrollers that execute automated cross-checking and diagnostic tests, the device isolates operating vulnerabilities to protect automation systems where the de-energized off-state governs safe machine criteria.\u003c\/p\u003e\n\u003cp\u003eThe physical enclosure contains an integrated combination layout featuring eight safety sinking inputs and eight safety sourcing solid-state outputs. The single-channel or dual-channel input paths accommodate dual-channel equivalence or complementary pairing topologies to fulfill strict emergency stopping or optical curtain tracking logic. The current-sourcing output points switch direct current voltage potentials outward to actuator loads up to rated margins. This module type communicates across central processors via network profiles managed in unified engineering software platforms.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEight safety-rated digital inputs for sinking circuit field tracking.\u003c\/li\u003e\n\u003cli\u003eEight safety-rated solid-state outputs operating in current-sourcing logic.\u003c\/li\u003e\n\u003cli\u003eStandardized CIP Safety network capability directly across DeviceNet backplane lines.\u003c\/li\u003e\n\u003cli\u003eSpecialized test output points to deliver short-circuit cross-wire oversight.\u003c\/li\u003e\n\u003cli\u003eRemovable front-facing clamp connection blocks to sustain existing loops during replacements.\u003c\/li\u003e\n\u003cli\u003eMatrix layout of dedicated LED status elements logging local, network, and power data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDual-channel emergency stop pushbutton station diagnostics.\u003c\/li\u003e\n\u003cli\u003ePersonnel safety light curtain perimeter barrier interlocking.\u003c\/li\u003e\n\u003cli\u003eSafety-critical gate monitoring and magnetic safety switch tracking.\u003c\/li\u003e\n\u003cli\u003eRobot work cell access zoning and high-risk machinery stop circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical 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\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGuard I\/O DeviceNet Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1791DS-IB8XOB8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003e16-Point Digital Combination Block Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Safety Inputs\u003c\/td\u003e\n\u003ctd\u003e8 Sinking Channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Safety Outputs\u003c\/td\u003e\n\u003ctd\u003e8 Sourcing Solid-State Channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Test Outputs\u003c\/td\u003e\n\u003ctd\u003e4 Sourcing Channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input\/Output Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeviceNet Supply Voltage Window\u003c\/td\u003e\n\u003ctd\u003e11V DC to 25V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunications Current Consumption\u003c\/td\u003e\n\u003ctd\u003e110 mA at 24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSourcing Output Current Rating\u003c\/td\u003e\n\u003ctd\u003e0.5 A per channel maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (On-State)\u003c\/td\u003e\n\u003ctd\u003e11V DC minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (Off-State)\u003c\/td\u003e\n\u003ctd\u003e5V DC maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Requirement Rating\u003c\/td\u003e\n\u003ctd\u003eIP54 (IEC 60529) or higher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10 to 55 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity Range\u003c\/td\u003e\n\u003ctd\u003e5% to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.42 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e80 mm x 196 mm x 77 mm\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\u003e\u003cstrong\u003eConnector Pin\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eI0 to I7\u003c\/td\u003e\n\u003ctd\u003eSafety Sinking Input Connection Nodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eT0 to T3\u003c\/td\u003e\n\u003ctd\u003eTest Pulse Monitoring Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eO0 to O7\u003c\/td\u003e\n\u003ctd\u003eSafety Sourcing Output Transistor Nodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV, M\u003c\/td\u003e\n\u003ctd\u003eExternal 24V DC Auxiliary Operational Voltage and Return Rails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeviceNet Terminal\u003c\/td\u003e\n\u003ctd\u003eNetwork Power and Communication Bus Line (V+, CAN_H, Shield, CAN_L, V-)\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\u003ch3\u003eDIN Rail Mounting\u003c\/h3\u003e\n\u003cp\u003eHook the upper structural anchoring bracket of the module base directly onto a standard 35 mm wide industrial DIN rail. Align the bottom retention assembly and supply perpendicular force until the block snaps into a flux fit. Fasten rigid mechanical end plates at both boundary ends of the block array to preserve structural stability against mechanical sliding.\u003c\/p\u003e\n\u003ch3\u003eMinimum Air Ventilation Spacing\u003c\/h3\u003e\n\u003cp\u003eLeave a clear physical void zone extending at least 50 mm above and below the module outer casing walls. This continuous passage ensures natural convective thermal dispersion and leaves adequate structural clearance for routing large multi-conductor signal cabling bundles.\u003c\/p\u003e\n\u003ch3\u003eSafety Ground Termination\u003c\/h3\u003e\n\u003cp\u003eRun a short, heavy-gauge copper bonding lead from the local functional chassis earth terminal block straight to the master electrical control cabinet subpanel framework. Keep the ground pathway connection path as brief as possible to ensure maximum dissipation of surrounding high-frequency industrial noise.\u003c\/p\u003e\n\u003ch3\u003eShield Treatment and Cable Handling\u003c\/h3\u003e\n\u003cp\u003eConnect the external DeviceNet communication cable metallic screen shield to a ground potential point strictly at the primary network power supply terminal. Never splice or common-tie the signal cabling or sensory input lines within shared wireways holding high-potential alternating current lines or heavy motor conductors.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat constitutes the safety state of the inputs and outputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe safety state of both the data loops and physical hardware points is defined as the off-state.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the test output nodes be safely leveraged to power low-current auxiliary coils?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, test outputs are not safety outputs and must never be applied as safety-rated drive connections.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat primary field hazard does the test pulse circuit address?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt allows continuous micro-intermittent signal line tracking to identify line cross-overs or direct wire-to-wire short circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow are the device address values adjusted on this particular block?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe node address is set manually using the mechanical rotary switches accessible on the front panel assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat configuration is required for the external DC power source supplying this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe primary direct current supply line must possess double or reinforced insulation properties to meet electrical safety mandates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the minimum electrical threshold that registers as a logical on-state?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn incoming signal matches the logical on condition when the input voltage equals or exceeds 11V DC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this model require specific cabinet provisions for open environments?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the hardware must be mounted in an electrical enclosure rated for IP54 or higher to keep out contaminants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do the front indicators reflect active fault states inside the hardware block?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe front-mounted MS and NS status lights alter color or flashing intervals to reveal distinct module faults or connection drops.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the input points handle two separate single-channel emergency stop buttons?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the software profiles allow configuring the points for independent single-channel operation rather than dual-channel monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat package format handles the physical data profiles for third-party tools?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eElectronic Data Sheets provide the direct textual parameters required by configuration utility software.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695177462123,"sku":"1791DS-IB8XOB8","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1791ds-ib8xob8-guard-i-o-16-point-digital-comb-module-t3l2v2cdem0_89a7acf4-3a1c-4af2-bef3-d078d78a812e.jpg?v=1766114164","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1791ds-ib8xob8-guard-i-o-16-point-digital-combination-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}