{"product_id":"allen-bradley-1771-ofe2-plc-5-analog-output-module","title":"Allen-Bradley 1771-OFE2 PLC-5 Analog Output Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-OFE2\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-OFE2\u003c\/strong\u003e Analog Output Module, operates as a dedicated hardware component for 4-20 mA current loop signal generation within PLC-5 I\/O chassis platforms.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eBase Model\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eOutput Channels\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eOutput Signal Range\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eIsolation Rating\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1771-OFE2\u003c\/td\u003e\n\u003ctd\u003eAnalog Output Module\u003c\/td\u003e\n\u003ctd\u003e4 isolated channels\u003c\/td\u003e\n\u003ctd\u003e4-20 mA\u003c\/td\u003e\n\u003ctd\u003e1000 V differential \/ 850 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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-OFE2\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\u003eUSA \/ Global Manufacturing standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.88 lbs (0.85 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eSingle-slot 1771 I\/O chassis module form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePower dissipation: 7.9 W (Thermal: 26.9 BTU\/hr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e4 individually isolated differential outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal Range\u003c\/td\u003e\n\u003ctd\u003e4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Resolution\u003c\/td\u003e\n\u003ctd\u003e12-bit binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eNatural Binary or BCD Scaling (+\/- 9999)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e1.50 A at 5 VDC (No external power required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Wiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WC or 1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeying Position\u003c\/td\u003e\n\u003ctd\u003eBetween 10 and 12; Between 26 and 28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 I\/O Density Scaling \u0026amp; Backplane Bus Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1771-OFE2 interfaces directly with the 1771 I\/O backplane bus to deliver high-density analog output control without requiring external field power supplies. Incorporating 1500 V optoelectrical isolation and 1000 V channel-to-channel differential protection, the module prevents ground loops and electrical transient propagation from affecting backplane bus communication velocity. The onboard Digital-to-Analog Converter (DAC) updates all 4 channels in 1.6 ms (Natural Binary) or 8 ms (BCD), supporting continuous output synchronization for process loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1771-OFE2 require an external power supply to drive the 4-20 mA loop outputs?\u003c\/p\u003e\n\u003cp\u003eA: No, the module draws all required operational power (1.50 A at 5 VDC) directly from the 1771 chassis backplane bus.\u003c\/p\u003e\n\u003cp\u003eQ: What diagnostic LED indicators are provided on the front panel of the 1771-OFE2?\u003c\/p\u003e\n\u003cp\u003eA: The module features 2 LED indicators: a green power status LED and a red fault indicator LED that illuminates if start-up self-checks detect a module error.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure the 1771 I\/O chassis backplane power is disconnected before installing or removing the module.\u003c\/li\u003e\n\u003cli\u003eInsert plastic keying bands into the chassis backplane connector between pins 10-12 and 26-28 to ensure proper slot keying.\u003c\/li\u003e\n\u003cli\u003eAlign the module circuit board with the chassis slot card guides and slide it firmly into place until fully seated.\u003c\/li\u003e\n\u003cli\u003eInstall the 1771-WC wiring arm and terminate field conductors using 12 AWG stranded or solid shielded cable (Belden 8761 recommended).\u003c\/li\u003e\n\u003cli\u003eTighten wiring arm terminal screws to a torque rating of 7-9 in-lbs (0.8-1.0 N-m).\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48747642323134,"sku":"1771-OFE2","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1771-OFE2_3.jpg?v=1786955775","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1771-ofe2-plc-5-analog-output-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}