{"product_id":"1762-of4-allen-bradley-analog-output-module-micrologix-1200","title":"1762-OF4 Allen-Bradley Analog Output Module MicroLogix 1200","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1762-OF4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1762\u003c\/strong\u003e analog output module, operates as a dedicated hardware component for converting Logix-backplane digital words into 0-10 VDC or 4-20 mA field signals within MicroLogix 1200 local expansion racks.\u003c\/p\u003e\n\u003ch3\u003eCatalog Number Decoding\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1762-\u003c\/strong\u003e: MicroLogix 1200 expansion I\/O family\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOF\u003c\/strong\u003e: Analog Output module type\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\u003c\/strong\u003e: 4 single-ended output channels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003e1762-OF4\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e17 x 11 x 5.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (per MicroLogix 1200 bulletin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC backplane draw approx 90 mA; no external power terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 single-ended analog outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Range Voltage\u003c\/td\u003e\n\u003ctd\u003e0-10 VDC (full scale 0-10.5 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Range Current\u003c\/td\u003e\n\u003ctd\u003e4-20 mA (full scale 0-21 mA), 0-20 mA selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e14-bit D\/A converter per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Bus\u003c\/td\u003e\n\u003ctd\u003eMicroLogix 1200 expansion ribbon connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN rail 35 mm or panel screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Latency and Firmware Flash Notes\u003c\/h3\u003e\n\u003cp\u003eThe 1762-OF4 attaches to a MicroLogix 1200 CPU (1762-Lxx) or 1762-L24\/L40 base via the right-side expansion connector. Data exchange uses the 1762 proprietary 8-bit parallel backplane protocol; update rate per output word is 1 scan of the \"OW\" data file, no deterministic timestamping. Firmware is mask-ROM fixed; no flash update path exists on this module class. I\/O density scaling is limited to 8 modules per CPU string including mixed 1762-I\/O; exceeding 8 drops the 9th node offline with no bus retry. Channel-to-channel isolation is not provided—all 4 outputs share a common internal 24 VDC return; external galvanic isolation must be field-added for hazardous loops.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1762-OF4 4-channel analog output module\u003c\/li\u003e\n\u003cli\u003e1 x Removable terminal block (pre-fitted)\u003c\/li\u003e\n\u003cli\u003e2 x DIN rail retention clips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDIN Rail and Wiring Rules\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSnap onto 35 mm DIN rail (EN 60715) or secure with 2 x M4 panel screws, torque 0.8 N·m.\u003c\/li\u003e\n\u003cli\u003eUse 0.2-1.5 mm² stranded wire with ferrules; strip length 6 mm.\u003c\/li\u003e\n\u003cli\u003eSeparate analog output pairs from 24 VDC power and relay wiring by 50 mm or run in separate conduit.\u003c\/li\u003e\n\u003cli\u003eGround module mounting rail to panel ground bus with 2.5 mm² green\/yellow conductor.\u003c\/li\u003e\n\u003cli\u003eDo not land 4-20 mA loop field power on module terminals; sink\/source compliance is internal 24 VDC backplane only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1762-OF4 be hot-swapped on a powered MicroLogix 1200 rack?\u003c\/p\u003e\n\u003cp\u003eA: No. The 1762 expansion bus has no staged power insertion. Removing or inserting under 24 VDC backplane power arcs the ribbon connector and forces CPU fault code 0015h. De-energize before swap.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane current load drawn from the CPU?\u003c\/p\u003e\n\u003cp\u003eA: 90 mA at 24 VDC nominal. A 1762-L40 CPU supplies max 450 mA to expansion; fitting 5 x 1762-OF4 leaves 0 mA headroom and trips bus undervoltage.\u003c\/p\u003e\n\u003cp\u003eQ: Are the 4 analog outputs electrically isolated from each other?\u003c\/p\u003e\n\u003cp\u003eA: No. All channels share a common internal 0 V reference tied to backplane 24 VDC return. Differential loops require external isolators; channel crosstalk is 0.1% typical without isolation.\u003c\/p\u003e\n\u003cp\u003eQ: Can output type be mixed per channel (e.g. ch1 voltage, ch2 current)?\u003c\/p\u003e\n\u003cp\u003eA: No. Output mode is global per module, set by DIP switch block SW1 on the side: all 4 channels are 0-10 VDC or all 4 are 4-20 mA. Per-channel mixing requires two modules.\u003c\/p\u003e\n\u003cp\u003eQ: What D\/A resolution applies to the 4-20 mA range?\u003c\/p\u003e\n\u003cp\u003eA: 14-bit monotonic. 4 mA = 0 counts, 20 mA = 16383 counts. Step size is 0.00098 mA; full-scale 21 mA clamps at 16383 with no overflow fault.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module support HART signal superimposition on 4-20 mA?\u003c\/p\u003e\n\u003cp\u003eA: No. The 1762-OF4 uses a passive sinking output stage with 24 VDC internal compliance. HART modem injection requires external 250 ohm shunt and isolator, not native.\u003c\/p\u003e\n\u003cp\u003eQ: Minimum scan impact when writing OW data file?\u003c\/p\u003e\n\u003cp\u003eA: One ladder scan writes the OWx:y word to D\/A latch. If CPU scan is 4 ms, output refresh latency is 4 ms max. Faster update needs 1769-OF4 on CompactLogix, not 1762.\u003c\/p\u003e\n\u003cp\u003eQ: What happens if 24 VDC backplane sags below 20 VDC?\u003c\/p\u003e\n\u003cp\u003eA: D\/A reference collapses; outputs drift linearly. At 18 VDC the module faults on bus undervoltage, outputs drive to 0 V \/ 4 mA fail-low until 21 VDC restore hysteresis clears.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066425069741,"sku":"1762-OF4","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1762-of4.jpg?v=1786073707","url":"https:\/\/www.maxwellplc.com\/ru\/products\/1762-of4-allen-bradley-analog-output-module-micrologix-1200","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}