{"product_id":"1771-obd-c-allen-bradley-digital-output-module-new-original-stock","title":"1771-OBD\/C Allen-Bradley Digital Output Module | New \u0026 Original Stock","description":"\u003ch2\u003eAllen-Bradley 1771-OBD\/C 1771 PLC-5 I\/O System Digital Output Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-OBD\/C\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-OBD\u003c\/strong\u003e Digital Output Module, operates as a dedicated hardware component for controlling external devices within 1771 PLC-5 I\/O System platforms.\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\u003e1771-OBD\/C\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e16 isolated DC outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-60 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current per Channel\u003c\/td\u003e\n\u003ctd\u003e2 A maximum (resistive load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Duty Output\u003c\/td\u003e\n\u003ctd\u003e0.2 A per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Module\u003c\/td\u003e\n\u003ctd\u003e8 A maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e400 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VAC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e7 W\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\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e178 x 50 x 180 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.84 kg (1.85 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet\/IP Deterministic Networks and I\/O Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OBD\/C handles 16 independent solid-state DC load drivers to maximize local I\/O density scaling inside standard 1771 universal racks. To maintain synchronous operational sequencing over Profinet or EtherNet\/IP deterministic networks via an adapter module, the 1771-OBD\/C restricts its internal backplane bus logic consumption to 400 mA at 5 VDC. This strict boundary optimizes the chassis power margin, allowing proper firmware flash compatibility across legacy systems and preventing bus execution dropouts during dense channel switching events.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the total combined electrical current limit for the 1771-OBD\/C module?\u003c\/p\u003e\n\u003cp\u003eA: The cumulative electrical current across all 16 channels must not exceed 8 A total for the module, even though individual discrete channels can handle up to a 2 A maximum resistive load.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1771-OBD\/C possess internal short-circuit protection for its channels?\u003c\/p\u003e\n\u003cp\u003eA: No. The internal electronic circuitry lacks embedded individual fuses. External fuse protection per output channel is necessary to guard the internal switching components against overcurrent states.\u003c\/p\u003e\n\u003cp\u003eQ: Is online hot-swapping supported for this module inside an energized 1771 chassis?\u003c\/p\u003e\n\u003cp\u003eA: No. The physical architecture of the 1771 rack requires isolation and complete power de-energization prior to module removal or insertion to protect against backplane logic faults and component stress.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Alignment:\u003c\/strong\u003e Align the module side tracks with the upper and lower plastic guides of the 1771 chassis slot. Slide the module backward until it sits completely into the backplane bus socket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Circuit Protection:\u003c\/strong\u003e Wire external inline fast-acting fuses for each channel to safeguard the module from field-side short-circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInductive Load Suppression:\u003c\/strong\u003e Install a flyback diode in parallel across DC inductive loads, such as solenoid coils and DC relays, to absorb transient voltage spikes during module turn-off cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Separation:\u003c\/strong\u003e Maintain physical isolation between the low-voltage DC output signal wires and any adjacent high-voltage AC electrical distribution or motor control cables.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":43425799798874,"sku":"1771-OBD\/C","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/193._5fc9a02b-f5b3-4f27-929a-6190fdfd4368.jpg?v=1779936198","url":"https:\/\/www.spareoil.com\/products\/1771-obd-c-allen-bradley-digital-output-module-new-original-stock","provider":"SpareOil Automation","version":"1.0","type":"link"}