Allen-Bradley 1771-OQ16 Digital Output Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1771-OQ16 is a 16-point transistor (TTL-compatible) digital output module designed for the PLC-5 platform’s 1771 I/O chassis. This guide covers technical specifications, compatible replacements, system compatibility, and selection criteria to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 1771-OQ16 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Module Type | Digital Output — Transistor (TTL) |
| Number of Output Points | 16 |
| Output Voltage Range | 5–50 VDC |
| Output Current per Point | 1 A (max) |
| Total Module Current | 4 A (max) |
| Output Type | Sourcing (PNP) |
| Backplane Current Draw | 800 mA @ 5 VDC |
| Operating Temperature | 0 °C to 60 °C |
| Storage Temperature | -40 °C to 85 °C |
| Relative Humidity | 5–95% (non-condensing) |
| Platform Compatibility | Allen-Bradley PLC-5 / 1771 I/O Chassis |
| Wiring Style | Screw terminal via 1771-WN wiring arm |
| Dimensions (H × W × D) | Single-slot 1771 module form factor |
| Weight | Approx. 500 g |
| Certifications | UL Listed, CE Marked |
Compatible Replacement & Equivalent Models
When the 1771-OQ16 is unavailable or end-of-life, the following models may serve as functional replacements depending on system configuration. Always verify electrical and mechanical compatibility before substitution.
| Model | Manufacturer | Output Type | Points | Notes |
|---|---|---|---|---|
| 1771-OQ16 | Allen-Bradley | Transistor (PNP) | 16 | Original — preferred for direct replacement |
| 1771-OQ16/B | Allen-Bradley | Transistor (PNP) | 16 | Revised series; functionally equivalent |
| 1771-OBD | Allen-Bradley | DC Output | 16 | Alternative DC output; verify voltage range |
| 1771-OB16 | Allen-Bradley | DC Sourcing | 16 | Higher voltage range variant |
| IC693MDL940 | GE Fanuc | Transistor Output | 16 | Cross-platform; requires I/O adapter and reprogramming |
| F3YO16A | Yokogawa | Digital Output | 16 | Third-party equivalent; verify chassis fit |
⚠ Note: Cross-brand replacements require full system validation. Konmask recommends using original Allen-Bradley modules for mission-critical applications.
Why Choose the Original Model
- Guaranteed Compatibility: Designed and validated exclusively for the 1771 I/O chassis — no adapter or firmware modification required.
- Proven Field Reliability: Decades of deployment in manufacturing, oil & gas, and utilities environments.
- Rockwell Software Integration: Fully recognized by RSLogix 5 and Studio 5000 for seamless I/O configuration.
- Reduced Commissioning Risk: No re-mapping of I/O addresses or ladder logic modifications needed.
- OEM Warranty Preservation: Using original modules maintains system warranty and support eligibility with Rockwell Automation.
Typical Applications
- Solenoid valve control in fluid handling and pneumatic systems
- Motor starter and contactor switching via relay interface
- Conveyor belt and material handling drive enable signals
- Indicator lamp and HMI pilot light control
- Batch process sequencing in food, beverage, and chemical plants
- Machine tool and press control in discrete manufacturing
- HVAC damper and actuator control in building automation
- Legacy PLC-5 system maintenance and life extension projects
System Compatibility
| Component | Compatible Models |
|---|---|
| I/O Chassis | 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B |
| Wiring Arm | 1771-WN (required for field wiring) |
| Processor | PLC-5/10, 5/15, 5/20, 5/25, 5/30, 5/40, 5/60, 5/80 |
| Programming Software | RSLogix 5 (v8.x+), 6200 Series Software |
| Power Supply | 1771-P4, 1771-P6, 1771-P7 series |
| Communication Adapter | 1771-ACN15, 1771-ACNR15 (ControlNet); 1771-SDN (DeviceNet) |
Selection Guide
Use the following criteria to confirm the 1771-OQ16 is the correct module for your application:
- Platform: Your system must use an Allen-Bradley PLC-5 processor with a 1771 I/O chassis.
- Output Signal Type: Load devices must accept 5–50 VDC transistor (PNP sourcing) signals.
- Point Count: 16 discrete output points required per slot.
- Current Load: Each output point must not exceed 1 A; total module load must not exceed 4 A.
- Slot Budget: Confirm available backplane current (800 mA @ 5 VDC) from your power supply.
- Environment: Operating temperature within 0–60 °C; non-condensing humidity environment.
- If migrating to ControlLogix: Consider 1756-OB16 with a 1771-to-1756 migration kit for a modernized architecture.
Quality Assurance & Sourcing
- Authentic Parts Only: All 1771-OQ16 modules sourced by Konmask are verified against Rockwell Automation part markings, date codes, and label integrity.
- Functional Testing: Modules undergo point-by-point output verification and backplane communication checks prior to shipment.
- Traceability: Full supply chain documentation available upon request, including distributor certificates and inspection records.
- Packaging: Anti-static packaging with moisture barrier; original or equivalent protective foam inserts.
- Warranty: 12-month replacement warranty against manufacturing defects and functional failure.
How to Order
- Confirm Part Number: Verify the exact model (1771-OQ16 or series revision) from your existing module label or system documentation.
- Specify Quantity: Indicate the number of modules required, including any recommended spares (typically 10–20% buffer for critical systems).
- Request a Quote: Contact Konmask via email or phone with your part number, quantity, and required delivery timeline.
- Review & Confirm: Our team will provide a formal quotation with lead time, pricing, and shipping options within 24 business hours.
- Place Order & Track: Orders are processed with full tracking and documentation. Expedited shipping available for urgent requirements.
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I use the 1771-OQ16 in a ControlLogix 1756 chassis?
A: No. The 1771-OQ16 is designed exclusively for the 1771 I/O chassis. For ControlLogix systems, use the 1756-OB16 or equivalent 1756-series output module.
Q: What is the difference between 1771-OQ16 and 1771-OB16?
A: The 1771-OQ16 is a TTL-compatible transistor output module (5–50 VDC), while the 1771-OB16 is a standard DC sourcing output module with a different voltage and current profile. Verify your load requirements before substituting.
Q: Is the 1771-OQ16 still in production?
A: Rockwell Automation has discontinued many PLC-5 series modules. Konmask specializes in sourcing genuine surplus and refurbished stock to support legacy system maintenance.
Q: Can I mix 1771-OQ16 with other 1771 modules in the same chassis?
A: Yes, provided the total backplane current draw does not exceed the power supply rating. Consult your 1771 chassis power budget documentation.
Q: Do you provide a test report with the module?
A: Yes. Konmask provides a functional test report upon request. Contact us before placing your order to include this in your shipment documentation.
Q: What wiring arm is required for the 1771-OQ16?
A: The 1771-WN wiring arm is required to connect field wiring to the module. Ensure it is ordered separately if not already available in your system.
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Contact: support@konmask.com | +0086 19859288691
