{"product_id":"allen-bradley-1771-ozl-digital-contact-output-module","title":"Allen-Bradley 1771-OZL Digital Contact Output Module","description":"\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1771-OZL\u003c\/strong\u003e is a PLC-5 dry-reed relay contact output module engineered for low-power discrete switching applications. Featuring 8 Form A normally open (N.O.) outputs arranged in four isolated groups of two, it provides galvanic isolation between plant output devices and system logic backplane circuitry. It operates across 0 to 24 V AC\/DC control ranges and integrates status LEDs on the front panel to indicate relay energization.\u003c\/p\u003e\n\u003ch3\u003eIsolated Reed Relay Architecture and Contact Load Limits\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1771-OZL\u003c\/strong\u003e module utilizes hermetically sealed dry-reed contacts designed for low-voltage signal switching. The eight channels are divided into four pairs, with each pair sharing a distinct common terminal. This configuration supports an isolation voltage rating of 1000 V for open contacts and 1500 V between coil and contact lines.\u003c\/p\u003e\n\u003cp\u003eEach contact output carries a continuous current limit of 100 mA with a power limit of 2.4 W resistive load for both DC and suppressed AC lines. A minimum contact load of 10 mA at 24 V AC\/DC is required for reliable contact closure, while internal signal transition delays remain at 1 ms for both turn-on and turn-off operations.\u003c\/p\u003e\n\u003ch3\u003eChassis Installation and Wiring Options\u003c\/h3\u003e\n\u003cp\u003eDesigned for installation in a 1771 Series A or B I\/O chassis, the \u003cstrong\u003e1771-OZL\u003c\/strong\u003e connects directly to the system backplane, drawing a maximum logic current of 420 mA at 5 VDC. Field connections attach via an interchangeable field wiring arm (such as the 12-terminal 1771-WD or 21-terminal 1771-WH), permitting module replacement without removing individual field wires.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\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\u003e1771-OZL\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\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Contact Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Count\u003c\/td\u003e\n\u003ctd\u003e8 Form A (Normally Open), 4 isolated sets of 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e0 to 24 VAC \/ 0 to 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Output Current\u003c\/td\u003e\n\u003ctd\u003e100 mA per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Contact Load\u003c\/td\u003e\n\u003ctd\u003e10 mA at 24 VAC \/ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Power Rating\u003c\/td\u003e\n\u003ctd\u003e2.4 W resistive per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1000 V (open contacts), 1500 V (coil-to-contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay Time\u003c\/td\u003e\n\u003ctd\u003e1 ms (ON and OFF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Switching Frequency\u003c\/td\u003e\n\u003ctd\u003e10 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e420 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e2.0 W to 2.2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e6.9 BTU\/hr to 7.6 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Wiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WD \/ 1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.00 lbs (0.45 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1771-OZL require external power supplies for logic operation?\u003c\/p\u003e\n\u003cp\u003eA: No. Logic power is drawn directly from the 1771 chassis backplane at 420 mA. External power supplies are only required to power the switched output load devices within the 0 to 24 V limit.\u003c\/p\u003e\n\u003cp\u003eQ: What field wiring arm model should be paired with the 1771-OZL?\u003c\/p\u003e\n\u003cp\u003eA: The module is compatible with 1771-WD or 1771-WH field wiring arms, allowing field conductors to remain connected during module swaps.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53088200392984,"sku":"1771-OZL","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1771-OAN2_Cocoai_4098e27b-d0cb-4b80-85a2-62f9c9983eea.jpg?v=1789870682","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1771-ozl-digital-contact-output-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}