Allen-Bradley 1771-OWNA Digital Output Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1771-OWNA is a discrete digital output module designed for the PLC-5 I/O chassis platform. It provides reliable 24 VDC sourcing output capability for industrial control applications. This page serves as a comprehensive selection and replacement reference for engineers, maintenance teams, and procurement specialists sourcing the 1771-OWNA or its compatible equivalents.
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Part Number: 1771-OWNA
- Module Type: Digital Output (Discrete)
- Output Type: Sourcing (PNP)
- Output Voltage: 24 VDC
- Number of Outputs: 16 points
- Output Current: 1 A per point (max)
- Backplane Current Draw: 800 mA @ 5 VDC
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Platform: PLC-5 / 1771 I/O Chassis
- Isolation: Optical isolation between field and backplane
- Indicators: Per-point LED status indicators
- Dimensions: Single-slot module
- Weight: Approx. 500 g
Compatible Replacement & Equivalent Models
The following modules are commonly evaluated as replacements or functional equivalents for the 1771-OWNA. Always verify electrical and mechanical compatibility before substitution.
- 1771-OWN — Allen-Bradley, same family, verify output current rating differences
- 1771-OA — Allen-Bradley AC output variant; not a direct drop-in, requires wiring change
- 1771-OB — Allen-Bradley 24 VDC sinking output; opposite polarity, verify field device compatibility
- 1771-OBD — Allen-Bradley 24 VDC sinking, 16-point; common cross-reference candidate
- 1771-OW16 — Allen-Bradley relay output; suitable for mixed-voltage loads
- Third-party compatible modules — Some aftermarket manufacturers produce 1771-compatible I/O modules; confirm backplane protocol and current ratings before use
Note: Konmask.com recommends using genuine Allen-Bradley modules for safety-critical applications. Contact our team for cross-reference verification.
Why Choose the Original Model
- Guaranteed compatibility with all 1771 I/O chassis configurations and PLC-5 processors
- Rockwell Automation firmware support and diagnostic integration via RSLogix 5
- Proven field reliability in continuous industrial environments
- Full optical isolation protects the backplane from field-side faults
- Per-point LED diagnostics reduce troubleshooting time
- Traceable manufacturing with documented revision history
Typical Applications
- Motor starter and contactor control in manufacturing lines
- Solenoid valve actuation in fluid handling systems
- Conveyor and material handling automation
- Pump and fan control in process industries (oil & gas, water treatment)
- Indicator lamp and alarm output in SCADA-integrated panels
- Discrete output control in automotive assembly and food processing
System Compatibility
- Chassis: 1771 I/O chassis (all slot sizes)
- Processors: PLC-5/10, PLC-5/15, PLC-5/20, PLC-5/30, PLC-5/40, PLC-5/60, PLC-5/80
- Programming Software: RSLogix 5 (Rockwell Automation)
- Power Supply: 1771-P4, 1771-P4S, 1771-P6S and compatible 1771 power supplies
- Not compatible with: ControlLogix (1756), CompactLogix (1769), or SLC 500 (1746) platforms without an adapter
Selection Guide
Use the following criteria to confirm the 1771-OWNA is the correct module for your application:
- Output polarity: Sourcing (PNP) — field devices must accept sourcing signals
- Voltage: 24 VDC field supply required
- Point count: 16 discrete outputs per module
- Current per point: ≤ 1 A; for higher loads, use relay output modules (e.g., 1771-OW16)
- Chassis slot: Single-slot; confirm available slots in your chassis
- If migrating from PLC-5 to ControlLogix: Consider 1756-OB16 or 1756-OB32 with appropriate adapter or full migration
- If replacing a failed module: Match the catalog number exactly; verify revision letter if firmware-sensitive
Quality Assurance & Sourcing
- All units sourced through Konmask.com are inspected prior to shipment
- New, refurbished, and tested-used grades available — clearly labeled on each listing
- Certificates of conformance and test reports available upon request
- Traceability documentation provided for regulated industries
- Secure anti-static packaging for all electronic modules
- Global shipping with export documentation support (HS Code: 8537.10)
How to Order
- Online: Add to cart directly from this page
- Email: support@konmask.com — include part number, quantity, and required grade
- Phone/WhatsApp: +0086 19859288691
- Bulk / OEM inquiries: Contact us for volume pricing and lead time
- Lead time: In-stock items ship within 1–3 business days; sourced items 5–15 business days
Replacement & Compatibility FAQ
Q: Can the 1771-OWNA replace a 1771-OB module?
A: No. The 1771-OWNA is a sourcing (PNP) output; the 1771-OB is sinking (NPN). Field wiring and device compatibility must be verified before any substitution.
Q: Is the 1771-OWNA compatible with ControlLogix chassis?
A: No. It is designed exclusively for the 1771 I/O chassis. ControlLogix uses the 1756 I/O family.
Q: What is the difference between 1771-OWNA and 1771-OWN?
A: The suffix “A” typically denotes a revision or minor specification update. Verify the exact output current and firmware revision requirements with your system documentation.
Q: Can I use a third-party replacement module?
A: Third-party modules may be cost-effective for non-critical applications, but Konmask.com recommends genuine Allen-Bradley parts for safety-rated or high-availability systems.
Q: Do you provide warranty on used modules?
A: Yes. All tested-used and refurbished modules carry a 90-day functional warranty. New modules follow manufacturer warranty terms.
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Contact: support@konmask.com | +0086 19859288691
