{"product_id":"1734-ov8e-allen-bradley-digital-dc-sinking-output-module-point-i-o","title":"1734-OV8E Allen-Bradley Digital DC Sinking Output Module POINT I\/O","description":"\u003cp\u003eDesigned for compact spatial footprints within distributed automation racks, the \u003cstrong\u003eAllen-Bradley 1734-OV8E\u003c\/strong\u003e (\u003cstrong\u003e1734-OV8E\u003c\/strong\u003e) Digital DC Sinking Output Module executes discrete switching commands through solid-state semiconductor switches.\u003c\/p\u003e\n\u003ch3\u003eArchitectural Layout \u0026amp; Part Identification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform Family\u003c\/strong\u003e: Allen-Bradley POINT I\/O modular terminal infrastructure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Designation\u003c\/strong\u003e: 1734-OV8E specifying an 8-channel sinking output configuration equipped with active electronic fault sensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Circuitry\u003c\/strong\u003e: Optically isolated switching transistors, backplane interface transceivers, and onboard diagnostic logic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications Overview\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\u003e1734-OV8E\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\u003eSeries\u003c\/td\u003e\n\u003ctd\u003ePOINT I\/O\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\u003e0.04 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e8 x 6 x 1.7 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e8 discrete sinking outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Module Current\u003c\/td\u003e\n\u003ctd\u003e3 A max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Draw\u003c\/td\u003e\n\u003ctd\u003e75 mA (POINTBus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Protection\u003c\/td\u003e\n\u003ctd\u003eElectronic short-circuit protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Network Integration \u0026amp; Bus Communication\u003c\/h3\u003e\n\u003cp\u003eThe module communicates state data across the local POINTBus architecture, interfacing smoothly with higher-level controllers via backplane bus communication velocity licences. Firmware flash compatibility ensures that operational updates integrate cleanly without breaking deterministic network timing. Furthermore, input\/output density scaling allows system expansion without introducing communication delays or processing bottlenecks.\u003c\/p\u003e\n\u003ch3\u003eDelivery Package Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1734-OV8E Digital DC Sinking Output Module\u003c\/li\u003e\n\u003cli\u003e1 x Mechanical locking latch clip\u003c\/li\u003e\n\u003cli\u003e1 x Technical installation reference leaflet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Mounting \u0026amp; Field Wiring Directives\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTerminal Base Engagement: Snap the module vertically onto an approved 1734 terminal base mounted on a grounded DIN rail, confirming positive physical latching.\u003c\/li\u003e\n\u003cli\u003eConductor Termination: Secure field actuator wires directly into the terminal base spring-clamp connections, maintaining strip lengths specified by the manufacturer.\u003c\/li\u003e\n\u003cli\u003eTransient Suppression: Install appropriate flyback diodes across inductive DC loads connected to the sinking outputs to suppress voltage spikes and protect internal semiconductor gates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvanced Engineering Inquiries\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eQ: How does the electronic short-circuit protection mechanism handle sustained overloads on individual sinking channels?\u003c\/p\u003e\n\u003cp\u003eA: When an overcurrent or short-circuit event trips on a channel, the internal electronic protection latches the output off to prevent thermal runaway, reporting the fault status back to the controller via backplane diagnostic registers until cleared by a command reset.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What is the propagation delay time from the assertion of the POINTBus backplane command to the physical state transition of the solid-state output switch?\u003c\/p\u003e\n\u003cp\u003eA: The hardware turn-on and turn-off propagation delays are optimized within sub-millisecond tolerances to ensure high-speed deterministic performance for fast-cycling pneumatic valves or electronic relays.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Can these sinking outputs be wired in parallel to aggregate higher current capacity for a single heavy DC load?\u003c\/p\u003e\n\u003cp\u003eA: Parallel wiring of solid-state sinking outputs is not recommended due to slight micro-variations in switching propagation speeds, which can cause transient current-hogging and thermal overload on the faster-responding channel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: How does the optical isolation barrier between the field side and the POINTBus backplane behave during common-mode voltage transients?\u003c\/p\u003e\n\u003cp\u003eA: The internal optocouplers provide high dielectric separation, effectively preventing high-frequency ground loops, electromagnetic noise, and common-mode voltage surges from transferring into the sensitive internal logic plane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What occurs to the field output state if communication over the POINTBus backplane is abruptly lost due to a network fault?\u003c\/p\u003e\n\u003cp\u003eA: The module transitions all output channels to predefined user-configured safe states (hold-last-state or forced-off) determined during the initial controller configuration profile to maintain fail-safe plant operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Are the electronic protection flags mapped directly into the controller input data table for real-time diagnostic polling?\u003c\/p\u003e\n\u003cp\u003eA: Yes, module-defined status bits transmit fault conditions directly to the controller memory map, allowing automated alarm generation and rapid troubleshooting without manual multimeter tracing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: How does thermal derating affect the aggregate 3 A module current limit when operating at the maximum ambient temperature boundary of +55 deg C?\u003c\/p\u003e\n\u003cp\u003eA: While the module functions up to +55 deg C, continuous maximum load profiles must account for internal power dissipation to avoid triggering internal thermal shutdown thresholds, particularly in tight unventilated enclosures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What specific considerations must be applied when driving high-inductance DC solenoids to prevent premature degradation of the output transistors?\u003c\/p\u003e\n\u003cp\u003eA: Inductive loads must include external freewheeling flyback diodes connected as close to the load terminals as possible to safely dissipate stored magnetic energy and protect the internal solid-state switches from repetitive inductive voltage kickback.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066401083565,"sku":"1734-OV8E","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1734-ov8e_17.jpg?v=1785122858","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1734-ov8e-allen-bradley-digital-dc-sinking-output-module-point-i-o","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}