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        1771-OWNA

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        Allen-Bradley 1771-OWNA is a 32-channel relay contact output module that enables reliable switching of resistive AC or DC loads within 1771 I/O chassis systems.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
        Shipping Mode
        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 1771-OWNA

        • Manufacturer:
          Allen-Bradley
        • Part Number:
          1771-OWNA
        • Product Family:
          PLC-5
        • Product Type:
          Contact Output Module
        • Outputs per module:
          32 (4 groups of 8)
        • Module Location:
          1771-A1B thru -A4B or later, 1771-AM1 or -AM2 chassis
        • Max. per channel:
          10mA - 1A continuous (derate linearly 0.033A/°C above 45°C)
        • Max. per module:
          12A (derate linearly 0.4A/°C above 45°C)
        • Max. per group:
          4A (derate linearly 0.133A/°C above 45°C)
        • Surge Current:
          1A (max) per output (at rated power)
        • Power Rating dc/ac:
          30W per output (resistive) maximum
        • Minimum Contact Load:
          10mA
        • Operate/Release Time:
          5ms (+1ms) typical
        • Bounce Time:
          1ms (max)
        • Switching Frequency:
          10Hz (max)
        • Power Dissipation:
          All relays OFF: 15mW; All relays ON: 12.5W (max.)
        • Thermal Dissipation:
          All relays OFF: 0.05 BTU/hr; All relays ON: 42.75 BTU/hr (max.)
        • Backplane Current:
          2.5A maximum; 1.8A nominal
        • Isolation Voltage:
          1000V between open contacts, 1500V coil to contact
        • Interconnect Cable Length:
          1000 ft. (304.8 meters)
        • Conductors Wire Size:
          14 gauge stranded (max), 3/64 inch insulation (max)
        • Operating Temperature:
          0 to 60°C (32 to 140°F)
        • Storage Temperature:
          -40 to 85°C (40 to 185°F)
        • Relative Humidity:
          5 to 95% (without condensation)
        • Wiring Arm Screw Torque:
          7-9 inch pounds
        • Weight:
          0.5 kg
        • Estimated shipping dimensions:
          3.1x14.5x25.4cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Use Cases Diagnostics Protection

        Features:

        • 32 relay outputs grouped in fours provide flexible multi-load control with independent commons.
        • High isolation ratings enhance system protection and prevent cross-circuit interference.
        • Backplane-powered relay coils simplify wiring and reduce external power requirements.
        Allen-Bradley 1771-OWNA plays a critical role in industrial automation systems where reliable switching of field devices is required. With 32 outputs available in a single module, it enables efficient control of multiple actuators, indicators, or other resistive loads. The grouping of outputs allows organized wiring and simplifies maintenance. Industrial environments benefit from its robust construction and stable electrical characteristics. Integration into 1771 chassis systems ensures compatibility with legacy and existing control architectures. This makes Allen-Bradley 1771-OWNA a practical solution for system upgrades or expansions.

        Operationally, Allen-Bradley 1771-OWNA relies on electromechanical relays to provide flexible switching for both AC and DC circuits. Each output can function in either sinking or sourcing configurations depending on the connected load. The module maintains consistent performance through controlled switching speeds and defined response times. Electrical isolation between channels adds a layer of protection, reducing the impact of faults. The absence of surge suppression emphasizes the importance of correct load selection. When used within specified parameters, the module delivers dependable switching performance.

        From an application standpoint, Allen-Bradley 1771-OWNA is well-suited for control panels, process automation systems, and manufacturing lines requiring discrete output control. Its compatibility with long interconnect cable lengths supports distributed installations. The wiring arm design allows quick replacement without disturbing field connections, minimizing downtime. Environmental tolerance ensures stable operation across a range of industrial conditions. Proper handling and installation further extend service life. Allen-Bradley 1771-OWNA remains a reliable choice for systems that demand consistent relay-based output control.

        The 1771-OWNA Allen-Bradley Contact Output Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Allen-Bradley 1771-OWNA Contact Output Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        Allen-Bradley 1771-OWNA Contact Output Module Specs

        General

        • Manufacturer Allen-Bradley
        • Model 1771-OWNA
        • Condition New Original ready stock
        • Product Family 1771-OW,1771-OW16,1771-OWN
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • System Integration: Used in industrial control systems (such as the Allen-Bradley PLC-5 architecture) as a standard digital contact output interface unit.
        • Low Impedance Circuit: Suitable for switching purely resistive loads or low-power circuits with extremely high impedance requirements.
        • Indirect Drive: Can be used to drive external AC input indicator modules or intermediate relay circuits, indirectly controlling indicator lights and small motor starters.
        • Multi-channel Isolation: Commonly deployed in automated production line control cabinets requiring multiple independent signal isolation outputs.
        • Status Check: The module's front panel is equipped with multiple status indicator lights for quick on-site troubleshooting of the physical contact's continuity.
        • Logic Identification: By reading the logic status indicators on the backplane and system control side, the normality of each output channel's signal output can be visually identified.
        • Real-time Capture: Combined with the controller diagnostic program, abnormal channel communication between the backplane logic side and external field wiring arms can be captured in real time.
        • Wiring Location: During the commissioning phase, open circuits or wiring errors can be located by activating logic outputs one by one and observing on-site hardware feedback.
        • Power-off Safety: The module design requires users to disconnect all power to the backplane and wiring arms before installing, disassembling, or replacing peripheral hardware in the field to prevent equipment damage or operator injury.
        • External Surge Protection: Since this hardware does not have built-in surge limiting circuitry, external isolation is strongly recommended, and it should not be used directly with inductive or capacitive loads to extend its physical lifespan.
        • Explosion-proof Compliance: When connecting it to hazardous areas containing flammable or explosive gases, strict adherence to hazardous location approval regulations is mandatory to avoid generating electrical sparks from live plugging and unplugging.
        • Current Limits: Wiring design requires careful planning of all peripheral channels to ensure that even with multiple channels operating simultaneously, the total cumulative load current of the entire module never exceeds the safety limits.
        Description
        Allen-Bradley 1771-OWNA delivers 32 non-selectable normally-open relay outputs arranged in four groups of eight, each group equipped with its own common connection. This structure allows simultaneous control of multiple independent loads while maintaining a maximum module current of 12A. Each output channel supports up to 1A continuous current and a maximum resistive load rating of 30W, making it suitable for a wide range of switching tasks.

        The 1771-OWNA module is engineered for installation in 1771-A1B through A4B or later chassis, as well as 1771AM1 and AM2 configurations. It draws power directly from the backplane, with a nominal current of 1.8A and a maximum of 2.5A when all relay coils are energized. This integrated power approach simplifies system design and ensures consistent relay actuation without requiring external supply for logic circuitry.

        Allen-Bradley 1771-OWNA operates within a temperature range of 0 to 60°C and supports storage conditions from -40 to 85°C. With a humidity tolerance of 5 to 95% non-condensing, the module is suitable for standard industrial environments. The relay response time is typically 5 ms with a maximum bounce time of 1 ms, and it supports switching frequencies up to 10 Hz, balancing durability and operational responsiveness.

        Electrical isolation is a key characteristic of Allen-Bradley 1771-OWNA, providing 1000V between open contacts and 1500V between coil and contact. This isolation prevents faults in one circuit from affecting others and protects backplane logic from transient disturbances. The module supports both AC and DC voltages, with flexibility for sinking or sourcing configurations depending on application requirements.

        Installation and wiring are facilitated through the 1771-WN field wiring arm, allowing connections without removing the module from the chassis. The module supports conductor sizes up to 14 gauge stranded wire and interconnect cable lengths up to 1000 ft (304.8 meters). Proper electrostatic discharge precautions are required during handling to maintain component integrity, ensuring long-term reliability in industrial systems.
        Revisions

        Revision Part #

        Also known as

        1771-OWNA Ser A
        1771-OWNA/A, Series A, Rev A
        Get Parts Quote
        Alternative Names
        1771-0WNA I77I-OWNA 17710WNA I77IOWNA 1771-OW 1771-OW16 1771-OWN 1771-OX
        Technical notes
        The Allen-Bradley 1771-OWNA is a heavy-duty PLC-5 digital I/O module featuring 32 non-selectable normally-open (Form A) relay contact outputs structured into 4 isolated groups of 8 channels, capable of supporting a cumulative maximum load of 12A per module strictly for switching resistive loads.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What load types can Allen-Bradley 1771-OWNA handle in industrial systems?
        Allen-Bradley 1771-OWNA is intended for resistive loads only, supporting both AC and DC circuits within a 30W per output limit.
        How many outputs are available in Allen-Bradley 1771-OWNA and how are they organized?
        Allen-Bradley 1771-OWNA provides 32 outputs divided into four groups of eight, each group having its own common terminal.
        Why Allen-Bradley 1771-OWNA is not recommended for inductive loads?
        Allen-Bradley 1771-OWNA does not include surge suppression circuitry, making inductive or capacitive loads unsuitable due to potential damage from voltage spikes.
        How installation is performed for Allen-Bradley 1771-OWNA in a chassis?
        Allen-Bradley 1771-OWNA is inserted into a compatible 1771 I/O chassis, aligned with card guides, and secured with a locking latch after power is removed.

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