{"product_id":"1769-of2-new-original-ab-compact-i-o-output-module-1769of2","title":"1769-OF2 New Original Compact I\/O Output Module 1769OF2","description":"\u003ch2 id=\"p2\"\u003e1769-OF2 — Compact I\/O 2-Channel Analog Output Module\u003c\/h2\u003e\n\u003cp\u003eThe 1769-OF2 is a two-channel analog output module for the 1769 Compact I\/O platform. Each channel outputs either a voltage signal (0–10V or ±10V) or a current signal (0–20 mA or 4–20 mA), configured independently per channel in the module properties. Resolution is 12-bit, and the channels share a common reference — they are not isolated from each other or from the backplane ground.\u003c\/p\u003e\n\u003cp\u003eTwo analog output channels is often exactly what a compact machine controller needs. A PID loop controlling a valve position, a second channel setting a drive speed reference — common automation tasks that don't require a full 4 or 8-channel analog output module. The 1769-OF2 covers these applications in a single Compact I\/O slot without consuming more I\/O capacity than the machine actually needs.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1769-OF2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eCompact I\/O (1769)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Output Ranges\u003c\/td\u003e\n\u003ctd\u003e0–10V DC, ±10V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Output Range\u003c\/td\u003e\n\u003ctd\u003e0–20 mA, 4–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e12-bit (over full output range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Output Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5% of full scale @ 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Output Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5% of full scale @ 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin Load (voltage mode)\u003c\/td\u003e\n\u003ctd\u003e1 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Load (current mode)\u003c\/td\u003e\n\u003ctd\u003e500 Ω @ 24V field supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eNot isolated (channels share common with backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Supply Required\u003c\/td\u003e\n\u003ctd\u003eYes — 24V DC (for current output mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5V)\u003c\/td\u003e\n\u003ctd\u003e60 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eUL 508, CE, IEC 61131-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eVoltage vs. Current Output — Choosing the Right Mode\u003c\/h3\u003e\n\u003cp\u003eThe choice between voltage and current output comes down to cable length, noise environment, and what the receiving device accepts. Voltage outputs are simpler to wire — just connect positive and negative — but the signal is susceptible to resistive drops along the cable (which shift the received value) and to induced noise from adjacent wiring. For short runs in a single panel, voltage output works cleanly.\u003c\/p\u003e\n\u003cp\u003eCurrent output (particularly 4–20 mA) is more robust over distance. The current level in the loop is the same at both ends regardless of cable resistance (as long as the loop supply has sufficient voltage headroom), and current loops reject inductively coupled noise more effectively than voltage signals. For runs longer than a few meters, or for connections to drives and instruments in electrically noisy environments, current output is the better choice.\u003c\/p\u003e\n\u003cp\u003eThe 4 mA live-zero of the 4–20 mA range also provides an open-circuit alarm — the receiving device sees below 4 mA and knows something is wrong, rather than misreading a broken wire as a zero setpoint.\u003c\/p\u003e\n\u003ch3\u003eWhere These Two Channels Get Used\u003c\/h3\u003e\n\u003cp\u003eWith only two outputs, applications tend to be specific and purposeful rather than general:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOne channel for a PID-controlled valve position, one for a PID-controlled pump speed — a small process loop with two manipulated variables sharing one module.\u003c\/li\u003e\n\u003cli\u003eBoth channels as speed references to two independent variable-speed drives on a coordinated machine, where the ratio between the two speeds is controlled in software.\u003c\/li\u003e\n\u003cli\u003eOne channel as a setpoint signal to a temperature controller, the second to a proportional heating valve — common in small thermal processing systems.\u003c\/li\u003e\n\u003cli\u003eOne channel driving an electro-pneumatic pressure regulator, the second providing a 0–10V reference to an HMI display for operator-entered setpoints fed back to a secondary loop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: Does the external 24V supply need to be isolated from the controller's 24V supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eSince the module's channels share a common with the backplane, using the same 24V supply for field power and the controller is generally acceptable in a single-panel installation. If field devices are on a different electrical system, a separate isolated supply avoids ground loop currents that appear as output errors.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: What happens to the outputs when the controller faults or goes to program mode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eOutput behavior on controller fault is configurable in Studio 5000 — options are hold last value or go to a defined output value. Set this according to the fail-safe requirement of the connected field device.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: Can both channels run in different modes simultaneously — one voltage, one current?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eYes. Each channel's output mode is configured independently. Channel 0 can be in 4–20 mA while channel 1 is in 0–10V, or any other combination the application requires.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: The accuracy is ±0.5% — is that sufficient for tight process control loops?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eFor most industrial process control applications, ±0.5% is adequate. It represents ±0.08 mA on a 4–20 mA range, or ±50 mV on a 0–10V range. Loop accuracy is typically limited by sensor and actuator uncertainties, not the analog output module. For metrology-grade applications, a higher-resolution isolated output module is more appropriate.\u003c\/p\u003e","brand":"topsdevice","offers":[{"title":"Default Title","offer_id":42766398914621,"sku":null,"price":282.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/6516\/8701\/files\/1769-OF2_8_1.jpg?v=1781236699","url":"https:\/\/topsdevice.com\/products\/1769-of2-new-original-ab-compact-i-o-output-module-1769of2","provider":"topsdevice","version":"1.0","type":"link"}