Allen-Bradley 1771-NOV TTL Output Module – 1771 PLC-5 I/O Series
When a TTL output module fails on a PLC-5 production line, the consequences are immediate and severe: digital output signals to downstream devices go dark, automated sequences halt, and operators are left troubleshooting blind in the middle of a live process. Conveyor systems stop, robotic arms freeze mid-cycle, and every minute of unplanned downtime translates directly into lost revenue and missed delivery commitments. The Allen-Bradley 1771-NOV TTL Output Module is the precision component that keeps these critical signal chains intact — and its absence is felt the moment it fails.
Within the Allen-Bradley 1771 I/O platform — one of the most widely deployed modular I/O systems in global industrial automation history — the 1771-NOV occupies a specialized niche as a TTL-compatible digital output module designed for PLC-5 processor-based control systems. Its ability to interface directly with TTL-level logic devices makes it indispensable in legacy and hybrid automation architectures across automotive, food & beverage, oil & gas, and discrete manufacturing industries worldwide. Rockwell Automation’s 1771 series remains a cornerstone of installed-base automation infrastructure, and the 1771-NOV continues to be a sought-after replacement and spare part globally.
Technical Specifications
- Part Number: 1771-NOV
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series: 1771 PLC-5 I/O System
- Module Type: TTL Digital Output Module
- Output Logic Level: TTL (Transistor-Transistor Logic)
- Compatible Processor: Allen-Bradley PLC-5 Series
- I/O Chassis Compatibility: 1771 I/O Chassis
- Weight: Approx. 800 g
- Condition Available: New, Refurbished, Tested Surplus
Note: All specifications are based on published Allen-Bradley documentation. Contact us to confirm compatibility with your specific system configuration.
Key Features & Benefits
- TTL-Level Output Compatibility: Directly interfaces with TTL logic devices, eliminating the need for signal conversion hardware in legacy systems.
- Seamless PLC-5 Integration: Designed as a native 1771 I/O chassis module, ensuring plug-and-play compatibility with existing PLC-5 control architectures.
- Reliable Digital Signal Control: Provides stable, noise-resistant digital output signals critical for precise machine sequencing and process control.
- Proven Industrial Durability: Built to Allen-Bradley’s industrial-grade standards for operation in demanding factory floor environments.
- Drop-In Replacement: Maintains backward compatibility within the 1771 I/O ecosystem, minimizing re-engineering costs during maintenance or system upgrades.
- Broad Installed-Base Support: Supports the vast global installed base of PLC-5 systems still operating in production environments.
Industry & Equipment Applications
- Automotive Manufacturing: Body assembly lines, paint shop conveyors, and robotic welding cell sequencing.
- Food & Beverage Processing: Packaging line control, filling machine output signaling, and conveyor routing.
- Oil & Gas: Valve control output signaling in pipeline and refinery automation systems.
- Discrete Manufacturing: Machine tool control, press automation, and material handling systems.
- Water & Wastewater Treatment: Pump control and process sequencing in legacy SCADA-integrated PLC-5 systems.
- Pharmaceutical: Batch process control and cleanroom automation with PLC-5 based systems.
System Integration & Compatible Parts
The 1771-NOV is designed to operate within the Allen-Bradley 1771 I/O chassis ecosystem. Compatible and commonly paired components include:
- 1771 I/O Chassis: 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B series chassis
- PLC-5 Processors: 1785-L20, 1785-L40, 1785-L60, 1785-L80 and related variants
- 1771 Power Supplies: 1771-P4S, 1771-P6S and compatible units
- 1771 Input Modules: Complementary digital and analog input modules for complete I/O system builds
- 1771 Wiring Arms: Compatible wiring arm assemblies for field wiring termination
Contact our technical team to verify exact compatibility with your chassis revision and processor firmware version.
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1771-NOV module offered goes through a rigorous quality verification process before shipment:
- Visual Inspection: Thorough check for physical damage, corrosion, and component integrity.
- Functional Testing: Where applicable, modules are bench-tested to verify output channel operation and communication with compatible processors.
- Authenticity Verification: We source from verified supply chains to minimize counterfeit risk — a critical concern in the industrial automation parts market.
- Secure Packaging: Anti-static packaging and protective materials used for all shipments to prevent transit damage.
- Documentation: Test reports and condition certificates available upon request for quality-critical procurement.
How to Order
- Submit an Inquiry: Use the contact form or email support@konmask.com with your required part number (1771-NOV), quantity, and required condition (new/refurbished/surplus).
- Receive a Quote: Our team will respond within 1 business day with pricing, availability, and lead time.
- Confirm & Pay: Approve the quotation and complete payment via your preferred method (T/T, PayPal, or other agreed terms).
- Shipment & Tracking: Your order is packed, shipped, and tracked — with full documentation provided.
- After-Sales Support: Our technical team remains available post-delivery for integration questions or warranty claims.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, and industrial control components — not a generalist marketplace.
- Global B2B Supply: Serving MRO buyers, system integrators, and OEMs across Asia, Europe, the Americas, and the Middle East.
- Hard-to-Find Parts: Specializing in obsolete, discontinued, and long-lead-time components like the 1771-NOV.
- Responsive Technical Support: Engineers available to assist with compatibility verification and system integration questions.
- Competitive Pricing: Direct sourcing relationships enable competitive pricing without compromising on quality assurance.
- Fast Global Shipping: Established logistics partnerships for reliable international delivery with full tracking.
Frequently Asked Questions
Q: Is the Allen-Bradley 1771-NOV still in production?
A: The 1771-NOV is part of the legacy Allen-Bradley 1771 I/O platform, which has been discontinued by Rockwell Automation. However, it remains widely available as new-old-stock (NOS) and tested surplus. Konmask.com maintains sourcing channels for this and similar legacy components.
Q: What is the difference between the 1771-NOV and other 1771 output modules?
A: The 1771-NOV is specifically a TTL (Transistor-Transistor Logic) output module, designed for interfacing with TTL-level logic devices. Other 1771 output modules (such as the 1771-OA or 1771-OB series) are designed for AC or DC field device outputs at higher voltage levels. The 1771-NOV is used where direct TTL signal compatibility is required.
Q: Can the 1771-NOV be used with ControlLogix or CompactLogix systems?
A: No. The 1771-NOV is designed exclusively for the 1771 I/O chassis and PLC-5 processor platform. It is not directly compatible with ControlLogix (1756) or CompactLogix (1769) systems without a dedicated adapter or migration solution.
Q: What condition options are available for the 1771-NOV?
A: We can source the 1771-NOV in new (factory-sealed where available), refurbished (cleaned, tested, and certified), and tested surplus conditions. Please specify your requirement when submitting an inquiry.
Q: How long does shipping take for international orders?
A: Shipping times vary by destination. Typical international delivery is 5–10 business days via express courier. We provide full tracking information upon shipment.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “Allen-Bradley 1771-NOV TTL Output Module”,
“description”: “Allen-Bradley 1771-NOV TTL Output Module for PLC-5 systems. Part of the 1771 I/O Series. Available in new, refurbished, and tested surplus condition. Global B2B supply from Konmask.com.”,
“sku”: “1771-NOV”,
“mpn”: “1771-NOV”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Rockwell Automation”
},
“category”: “PLC Output Module”,
“url”: “https://konmask.com/products/allen-bradley-1771-nov-ttl-output-module-plc5”,
“offers”: {
“@type”: “Offer”,
“url”: “https://konmask.com/products/allen-bradley-1771-nov-ttl-output-module-plc5”,
“priceCurrency”: “USD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”
}
}
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “Is the Allen-Bradley 1771-NOV still in production?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1771-NOV is part of the legacy Allen-Bradley 1771 I/O platform, which has been discontinued by Rockwell Automation. It remains available as new-old-stock and tested surplus through Konmask.com.”
}
},
{
“@type”: “Question”,
“name”: “What is the difference between the 1771-NOV and other 1771 output modules?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1771-NOV is a TTL output module for interfacing with TTL-level logic devices. Other 1771 output modules such as the 1771-OA or 1771-OB are designed for AC or DC field device outputs at higher voltage levels.”
}
},
{
“@type”: “Question”,
“name”: “Can the 1771-NOV be used with ControlLogix or CompactLogix systems?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “No. The 1771-NOV is designed exclusively for the 1771 I/O chassis and PLC-5 processor platform and is not directly compatible with ControlLogix (1756) or CompactLogix (1769) systems.”
}
},
{
“@type”: “Question”,
“name”: “What condition options are available for the 1771-NOV?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Konmask.com can source the 1771-NOV in new, refurbished, and tested surplus conditions. Please specify your requirement when submitting an inquiry.”
}
},
{
“@type”: “Question”,
“name”: “How long does shipping take for international orders?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Typical international delivery is 5–10 business days via express courier. Full tracking information is provided upon shipment.”
}
}
]
}
]
}
