{"product_id":"1746-og16-allen-bradley-current-sinking-ttl-output-module-slc-500","title":"1746-OG16 Allen-Bradley Current Sinking TTL Output Module SLC 500","description":"\u003cp\u003eConfigured for low-power digital signal switching in SLC 500 rack-based architectures, the \u003cstrong\u003eAllen-Bradley 1746-OG16\u003c\/strong\u003e (\u003cstrong\u003e1746-OG16\u003c\/strong\u003e Current Sinking TTL Output Module) provides direct physical\/electrical execution. This 16-point discrete hardware assembly translates logic-level backplane commands into isolated Transistor-Transistor Logic (TTL) sinking outputs to drive solid-state relays, specialized integrated circuits, and external microprocessor peripherals without signal conditioning interfaces.\u003c\/p\u003e\n\u003ch3\u003eModel Catalog Analysis\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Part Number 1746-OG16\u003c\/strong\u003e: Designates a 16-channel, 5 VDC nominal TTL sinking output module for the SLC 500 platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries Revision 1746-OG16\/A\u003c\/strong\u003e: Initial hardware release utilizing discrete TTL component layouts and legacy backplane interfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries Revision 1746-OG16\/B\u003c\/strong\u003e: Updated circuit trace layouts with enhanced immunity to field circuit switching noise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries Revision 1746-OG16\/C\u003c\/strong\u003e: Revised ASIC integration for optimized backplane power efficiency and physical component protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePhysical \u0026amp; Electrical Data\u003c\/h3\u003e\n\u003cfigure\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\u003e1746-OG16\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\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e12.7 x 5.1 x 15.2 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.90 W (Backplane) + Field Load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e16 Channels (Non-isolated per group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e4.5 to 5.5 VDC Sink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current per Channel\u003c\/td\u003e\n\u003ctd\u003e0.024 A (24 mA max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current per Module\u003c\/td\u003e\n\u003ctd\u003e0.384 A (384 mA max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Demand\u003c\/td\u003e\n\u003ctd\u003e180 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Backplane \u0026amp; Bus Communication Integration\u003c\/h3\u003e\n\u003cp\u003eThe module negotiates signal transfer over the internal SLC 500 chassis backplane bus communication velocity framework, operating deterministically to synchronize output state transitions with processor scan execution. Logic state updates execute across the local rack bus without external signal propagation delay, keeping overall firmware flash compatibility stable across standard 1747 CPU platforms. Low logic level output sinking prevents bus voltage dips, maintaining clean dynamic execution across adjacent high-density I\/O modules installed on the same backplane section.\u003c\/p\u003e\n\u003ch3\u003eOrdering \u0026amp; Package Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1746-OG16 Output Module\u003c\/li\u003e\n\u003cli\u003e1 x Removable Terminal Block Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Installation Instruction Leaflet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Installation \u0026amp; Wiring Rules\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTurn off chassis backplane power before inserting or removing the module from the slot.\u003c\/li\u003e\n\u003cli\u003eKeep 5 VDC TTL signal wiring away from high-voltage AC mains and inductive motor leads.\u003c\/li\u003e\n\u003cli\u003eConnect external 5 VDC power supply common directly to the designated field ground pin to avoid ground loop noise.\u003c\/li\u003e\n\u003cli\u003eLimit total conductor run length to less than 3 meters (10 feet) to prevent TTL signal attenuation and ringing.\u003c\/li\u003e\n\u003cli\u003eEnsure all terminal screws are tightened to a torque of 0.6 N-m (5 lb-in).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Questions \u0026amp; Answers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the primary electrical operating mechanism of the output channels?\u003c\/p\u003e\n\u003cp\u003eThe module operates as a current-sinking device, drawing up to 24 mA per channel toward ground when logic state turns low.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this module switch standard 24 VDC industrial control circuits?\u003c\/p\u003e\n\u003cp\u003eNo. Applying voltages outside the 4.5 to 5.5 VDC range will damage the internal TTL output transistors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module allow hot-swapping under powered rack conditions?\u003c\/p\u003e\n\u003cp\u003eNo. Insertion or removal while the backplane is energized can cause unexpected signal glitches or permanent module damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the total current draw from the internal 5 VDC backplane bus?\u003c\/p\u003e\n\u003cp\u003eThe module draws a steady-state current of 180 mA directly from the SLC 500 backplane 5 VDC rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if external field supply polarity is wired in reverse?\u003c\/p\u003e\n\u003cp\u003eReverse voltage application causes excessive forward diode conduction, blowing internal protective fuses or damaging output circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are the 16 output channels structured across field wiring terminals?\u003c\/p\u003e\n\u003cp\u003eAll 16 channels share a common internal ground return logic path routed through the module terminal block.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow does cable length affect 5 VDC TTL signal transmission integrity?\u003c\/p\u003e\n\u003cp\u003eLong wire runs introduce line capacitance, causing edge degradation and increased susceptibility to electromagnetic noise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs external circuit protection required for inductive TTL loads?\u003c\/p\u003e\n\u003cp\u003eYes. Flyback diodes must be placed across external inductive loads to suppress voltage transients during turn-off events.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066408325293,"sku":"1746-OG16","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1746-OG16_1-1.jpg?v=1785903804","url":"https:\/\/www.maxwellplc.com\/ru\/products\/1746-og16-allen-bradley-current-sinking-ttl-output-module-slc-500","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}