{"product_id":"1771-ogd-allen-bradley-1771-ttl-output-module","title":"1771-OGD | Allen Bradley 1771 TTL Output Module","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eTTL-compatible Digital Output Module\u003c\/strong\u003e from the Allen-Bradley PLC-5 series provides 16 discrete outputs for driving TTL-level devices. It is designed for use in the 1771 I\/O chassis, requiring both backplane and external 5 V DC power for proper operation.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1771-OGD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e TTL Digital Output Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Outputs:\u003c\/strong\u003e 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Voltage Range:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh = TRUE:\u003c\/strong\u003e 2.0 to 5.25 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow = TRUE:\u003c\/strong\u003e –0.2 to +0.8 V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Open collector with internal 1 kΩ pull-up to +5 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Source Current per Output:\u003c\/strong\u003e 1 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Sink Current per Output:\u003c\/strong\u003e 20 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Power Supply:\u003c\/strong\u003e 5 V DC ±0.25 V (≤50 mV ripple)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Supply Current:\u003c\/strong\u003e 310 mA max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 230 mA @ 5 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 2.8 W max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e 9.5 BTU\/hr max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Delay:\u003c\/strong\u003e \u0026lt; 1 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation Voltage:\u003c\/strong\u003e 1500 V AC RMS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e16 red LEDs (one per output)\u003c\/li\u003e\n\u003cli\u003eGreen ACTIVE LED (fuse status)\u003c\/li\u003e\n\u003cli\u003eGreen HIGH LED (logic polarity)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLogic Polarity Selection:\u003c\/strong\u003e Jumper-configurable (High = TRUE or Low = TRUE)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Wiring Arm:\u003c\/strong\u003e 1771-WH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Screw Torque:\u003c\/strong\u003e 7–9 in-lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Size:\u003c\/strong\u003e 14 AWG max, 1.2 mm insulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeying:\u003c\/strong\u003e Between 16–18 and 26–28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Single-slot, rack-mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Type:\u003c\/strong\u003e Open (requires protective enclosure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to +60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e –40°C to +85°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5–95% non-condensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Rating:\u003c\/strong\u003e 0.5 A, 250 V normal blow (Littelfuse 312.250 or equivalent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e UL, CSA, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e16 TTL-compatible outputs for high-speed digital control\u003c\/li\u003e\n\u003cli\u003eOpen collector design with internal pull-up resistors\u003c\/li\u003e\n\u003cli\u003eDual power requirement for TTL signal integrity\u003c\/li\u003e\n\u003cli\u003eJumper-selectable logic polarity (positive or negative)\u003c\/li\u003e\n\u003cli\u003eLED indicators for output status and diagnostics\u003c\/li\u003e\n\u003cli\u003eFuse protection for external power and output terminals\u003c\/li\u003e\n\u003cli\u003eCompatible with PLC-5 addressing modes and TTL input modules\u003c\/li\u003e\n\u003cli\u003eDesigned for low-voltage, noise-sensitive applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":42450974769219,"sku":"1771-OGD","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/5810\/3107\/files\/1771-OGD.png?v=1753773654","url":"https:\/\/www.plcdcspro.com\/products\/1771-ogd-allen-bradley-1771-ttl-output-module","provider":"PLC DCS Pro Ltd.","version":"1.0","type":"link"}