{"product_id":"allen-bradley-analog-current-output-1790d-tn0c2","title":"Allen-Bradley Analog Current Output | 1790D-TN0C2","description":"\u003ch2\u003eAllen-Bradley 1790D-TN0C2: Precision Analog Output Module\u003c\/h2\u003e\n\u003cp\u003eCommand analog devices with exceptional accuracy. The Allen-Bradley \u003cstrong\u003e1790D-TN0C2\u003c\/strong\u003e provides two high-precision current output channels. It generates standard 0-20 mA signals to control devices like proportional valves, variable frequency drives, and analog meters. This module delivers stable, reliable commands for precise process regulation.\u003c\/p\u003e\n\u003ch3\u003eDetailed Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Model:\u003c\/strong\u003e Allen-Bradley \u003cstrong\u003e1790D-TN0C2\u003c\/strong\u003e (1790D Series Compact I\/O).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #27ae60;\"\u003eOutput Channels:\u003c\/strong\u003e 2 single-ended, non-isolated current output channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #27ae60;\"\u003eOutput Signal:\u003c\/strong\u003e 0 to 20 mA standard industrial control signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 12-bit (4,096 steps), 4.88 µA per least significant bit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.2% of full scale across 0 to 55°C operating temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpdate Speed:\u003c\/strong\u003e 2 milliseconds per channel for rapid signal adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad Capacity:\u003c\/strong\u003e Supports external load resistance up to 600 Ω maximum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Requires 24V DC field power (21.6-26.4V) and DeviceNet bus power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; System Integration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Connection:\u003c\/strong\u003e M3.0 screw terminal block for secure field wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Specification:\u003c\/strong\u003e Tighten terminals to a maximum of 7 lb-in (0.79 Nm).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual Diagnostics:\u003c\/strong\u003e Two bi-color (red\/green) LEDs provide status for each output channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion Capacity:\u003c\/strong\u003e This base module can support up to two additional discrete I\/O expansion modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e Factory calibrated; no user calibration required, reducing maintenance effort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e 1250V AC RMS optical isolation between analog outputs and internal logic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackaging \u0026amp; Support Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePackage includes one 1790D-TN0C2 analog output module.\u003c\/li\u003e\n\u003cli\u003eThis precision module is covered by a standard 12-month warranty.\u003c\/li\u003e\n\u003cli\u003eGlobal shipping available via FedEx, UPS, and DHL for reliable delivery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eExpert FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat devices are typically controlled by this module?\u003c\/strong\u003e\u003cbr\u003eIt's ideal for commanding proportional control valves, the speed reference input on variable frequency drives (VFDs), the setpoint input on process controllers, and analog panel meters or chart recorders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow do I convert the 0-20 mA signal to a 4-20 mA signal if my device requires it?\u003c\/strong\u003e\u003cbr\u003eSome end devices have a configuration switch or parameter to select 0-20 mA or 4-20 mA input. If not, you can use a signal isolator\/conditioner between the module and the device to offset and scale the signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhy is the maximum load resistance 600 Ω important?\u003c\/strong\u003e\u003cbr\u003eThe module needs sufficient voltage to push the current through the loop. Using Ohm's Law (V=IR), at 20 mA into 600 Ω, you need 12V. The module's compliance voltage must be higher than this plus any other drops in the loop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan the two channels output different current values independently?\u003c\/strong\u003e\u003cbr\u003eYes. Each channel is controlled independently via the DeviceNet network. You can send separate command values to each channel for controlling two different devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat happens if the output wire breaks or the load is disconnected?\u003c\/strong\u003e\u003cbr\u003eThe output circuit will become open. Most systems will see this as a loss of signal (0 mA). Good system design includes monitoring at the receiving device or using isolators with broken wire detection to alert operators.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e© 2025 Ubest Automation Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e Phone: \u003ca href=\"https:\/\/wa.me\/8618030005825\"\u003e+86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51496579334426,"sku":"1790D-TN0C2","price":174.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/1790D-TN0C2_3.jpg?v=1766710467","url":"https:\/\/www.ubestplc.com\/products\/allen-bradley-analog-current-output-1790d-tn0c2","provider":"Ubest Automation Limited","version":"1.0","type":"link"}