Allen-Bradley 1771-OW16 Digital Output Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley (Rockwell Automation) 1771-OW16 is a 16-point relay contact output module designed for the PLC-5 I/O chassis. It provides isolated relay outputs suitable for controlling AC/DC loads in demanding industrial environments. This page serves as a comprehensive selection and replacement reference for engineers sourcing original, equivalent, or compatible alternatives.
Technical Specifications
- Manufacturer: Allen-Bradley / Rockwell Automation
- Part Number: 1771-OW16
- Module Type: Digital (Discrete) Output — Relay Contact
- Number of Outputs: 16 points
- Output Type: Relay (normally open contacts)
- Output Voltage Range: 5–265 V AC/DC
- Output Current Rating: 2 A per point (resistive load)
- Backplane Current Draw: 800 mA @ 5 VDC
- Isolation: Optically isolated between field side and backplane
- Compatible Chassis: 1771 I/O chassis (PLC-5 platform)
- Slot Width: Single-slot module
- Operating Temperature: 0–60 °C
- Weight: Approx. 450 g
- Certifications: UL, CSA, CE
Compatible Replacement & Equivalent Models
When the 1771-OW16 is unavailable or end-of-life, the following models may serve as direct or functional replacements depending on your system configuration:
- 1771-OW — 8-point relay output predecessor; use two modules to match 16-point capacity
- 1771-OWN — Normally closed relay variant; verify contact logic before substitution
- 1756-OW16I (ControlLogix) — Modern 16-point relay output; requires chassis migration to 1756 platform
- 1769-OW8 (CompactLogix) — 8-point relay output for CompactLogix; two modules needed for equivalent I/O count
- 1734-OW2 (POINT I/O) — Distributed relay output; suitable for decentralized architectures
- Third-party equivalents: Wago 750-513, Phoenix Contact IB IL 24 DO 16-PAC — verify electrical ratings and backplane compatibility before use
Note: Always verify voltage range, current rating, and chassis compatibility before substituting any module. Contact Konmask technical support for application-specific guidance.
Why Choose the Original Model
- Guaranteed compatibility with existing 1771 I/O chassis and PLC-5 processor without firmware or wiring changes
- Proven field reliability in continuous industrial operation across decades of deployment
- Rockwell Automation certified — meets OEM specifications for relay life, contact rating, and isolation
- Simplified maintenance — direct hot-swap replacement with no re-programming required
- Regulatory compliance preserved — UL/CSA/CE listings maintained without re-certification
Typical Applications
- Motor starter and contactor control in manufacturing lines
- Solenoid valve switching in fluid handling systems
- Pilot light and alarm annunciator control
- Conveyor and material handling system interlocks
- HVAC and building automation relay switching
- Oil & gas process control panels
- Water treatment and utilities automation
System Compatibility
- PLC Platform: Allen-Bradley PLC-5 (all variants)
- I/O Chassis: 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B series
- Processor Compatibility: 1785-Lxx PLC-5 processors
- Programming Software: RSLogix 5, Logix Designer (legacy mode)
- Communication: DH+, Remote I/O (RIO) via chassis backplane
- Not compatible with: 1756 ControlLogix chassis, 1769 CompactLogix chassis (without adapter)
Selection Guide
Use the following criteria to determine whether the 1771-OW16 or an alternative is the right choice for your application:
- Existing PLC-5 system with 1771 chassis? → 1771-OW16 is the direct fit. No migration required.
- Need 16 isolated relay outputs with AC/DC flexibility? → 1771-OW16 meets this requirement natively.
- Planning a platform migration to ControlLogix? → Consider 1756-OW16I with a 1771-SB adapter for phased migration.
- Budget-constrained or sourcing refurbished? → Konmask supplies tested, refurbished 1771-OW16 units with 90-day warranty.
- High-cycle or safety-critical application? → Specify new original stock; contact us for traceability documentation.
Quality Assurance & Sourcing
- All units inspected and function-tested prior to shipment
- Original manufacturer packaging preserved where available
- Refurbished units include full cleaning, contact inspection, and burn-in test
- Traceability documentation available on request (batch records, test reports)
- Anti-static packaging and shock-protected shipping for all orders
- 90-day warranty on refurbished units; 12-month warranty on new original stock
How to Order
- Online: Add to cart directly from this page
- Email RFQ: support@konmask.com — include quantity, required delivery date, and any traceability requirements
- Phone/WhatsApp: +0086 19859288691
- Bulk / OEM pricing: Available for orders of 5+ units — contact us for a quote
- Lead time: In-stock items ship within 1–3 business days; sourced items 5–15 business days
Replacement & Compatibility FAQ
Q: Can I use the 1771-OW16 in a ControlLogix 1756 chassis?
A: No. The 1771-OW16 is designed exclusively for the 1771 I/O chassis. For ControlLogix, use the 1756-OW16I.
Q: Is the 1771-OW16 still in production?
A: Rockwell Automation has discontinued new production. Konmask supplies tested refurbished and new-old-stock (NOS) units.
Q: What is the relay contact life rating?
A: Rated for 100,000 mechanical operations minimum under rated load conditions.
Q: Can I mix 1771-OW16 with other 1771 modules in the same chassis?
A: Yes, the 1771 chassis supports mixed module types in any slot configuration.
Q: Do you provide a certificate of conformance?
A: Yes, available upon request for all new and refurbished units.
Q: What is the difference between 1771-OW and 1771-OW16?
A: The 1771-OW has 8 output points; the 1771-OW16 doubles the capacity to 16 points in the same single-slot form factor.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
