{"product_id":"allen-bradley-1715-tadob8de-1715-duplex-do-termination-assembly","title":"Allen-Bradley 1715-TADOB8DE 1715 Duplex DO Termination Assembly","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1715-TADOB8DE\u003c\/strong\u003e is an 8-channel digital output duplex termination assembly designed for high-availability applications within the 1715 Redundant I\/O platform. Functioning as the field-wiring interface for two redundant 1715-OB8DE digital output modules, it routes control signals to output devices while enabling dual-module fault tolerance and continuous online maintenance. The assembly accommodates passive parallel channel routing, allowing either module to drive field output loops without interrupting process operations during hardware removal or replacement.\u003c\/p\u003e\n\u003ch3\u003eSystem Architecture \u0026amp; Duplex Operation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1715-TADOB8DE\u003c\/strong\u003e connects to the 1715 I\/O base unit to interface two paired 1715-OB8DE digital output modules. Internal signal paths route each of the 8 output channels in parallel across both module slots, implementing hardware-level redundancy for critical control loops. Field connections operate across a 18 to 32 V DC supply range, with each output channel rated for up to 0.5 A continuous current.\u003c\/p\u003e\n\u003cp\u003eThe assembly operates with low power consumption, dissipating a maximum of 3.0 W on system circuitry and 0.17 W per field loop. Insulation testing supports 50 V continuous basic isolation between I\/O ports and the backplane bus, with withstand testing rated at 500 V AC for 60 seconds. All circuit boards feature standard conformal coating to protect against corrosive industrial atmospheres.\u003c\/p\u003e\n\u003ch3\u003eMechanical Installation \u0026amp; Field Wiring\u003c\/h3\u003e\n\u003cp\u003eField wiring connects to terminal block screw terminals tightened to a recommended torque of 0.5 N-m (4.4 lb-in). The assembly features standard open-style IP20 ingress protection suitable for mounting in protected control enclosures on 35 mm DIN rails.\u003c\/p\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\u003e\u003cstrong\u003e1715-TADOB8DE\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003e1715 Redundant I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Type\u003c\/td\u003e\n\u003ctd\u003eDigital Output Duplex Termination Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Modules\u003c\/td\u003e\n\u003ctd\u003e2x 1715-OB8DE Digital Output Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Capacity\u003c\/td\u003e\n\u003ctd\u003e8 Output Channels (Duplex Redundant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e18 to 32 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Current Rating\u003c\/td\u003e\n\u003ctd\u003e0.5 A per channel max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e3.0 W max (System), 0.17 W max (per field loop)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous (basic insulation, I\/O ports to backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Withstand Test\u003c\/td\u003e\n\u003ctd\u003e500 V AC for 60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size\u003c\/td\u003e\n\u003ctd\u003e0.75 to 1.5 mm² (18 to 16 AWG) solid or stranded copper (85 deg C min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Terminal Torque\u003c\/td\u003e\n\u003ctd\u003e0.5 N-m (4.4 lb-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIngress Protection\u003c\/td\u003e\n\u003ctd\u003eIP20 \/ NEMA Open-Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25 to 70 deg C (-13 to 158 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e2 g operational\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental Protection\u003c\/td\u003e\n\u003ctd\u003eConformal Coated (ANSI\/ISA-S71.04 Class G1, G2, G3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (H x W x D)\u003c\/td\u003e\n\u003ctd\u003e132 x 84 mm (5.25 x 3.375 in) base profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.26 kg (0.57 lbs \/ 260 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1715-TADOB8DE be operated with only a single 1715-OB8DE module installed? A: Yes. While designed for duplex configuration, the termination assembly supports simplex operation with one 1715-OB8DE module installed. A second output module can be added at any time to establish fault-tolerant duplex operation without rewiring field terminal connections.\u003c\/p\u003e\n\u003cp\u003eQ: Are individual output channels isolated from each other on the 1715-TADOB8DE? A: No. The termination assembly provides 50 V continuous isolation between the I\/O field ports and the internal backplane bus, but field ports share common return paths and do not offer channel-to-channel isolation.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53162580836632,"sku":"1715-TADOB8DE","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1715-TADOB8DE_Cocoai.jpg?v=1793934671","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1715-tadob8de-1715-duplex-do-termination-assembly","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}