Allen-Bradley 1756-OB16I 16-Point Isolated Digital Output Module – ControlLogix 1756 Series
When a digital output module fails on the plant floor, the consequences are immediate and severe: actuators freeze, solenoid valves lock in place, conveyor lines halt, and entire production cells go dark. Without a reliable isolated output module like the Allen-Bradley 1756-OB16I, your ControlLogix system loses its ability to command field devices — turning a precision automation platform into an expensive paperweight. Every minute of unplanned downtime in a modern manufacturing facility can cost thousands of dollars, making the right spare parts strategy not just a technical decision, but a business-critical one.
The 1756-OB16I occupies a strategic position within Rockwell Automation’s ControlLogix 1756 platform — one of the most widely deployed programmable automation controller (PAC) architectures in global discrete and process manufacturing. As an isolated 16-point DC output module, it provides individual point-level isolation, dramatically reducing the risk of fault propagation across output channels. This design philosophy makes it the preferred choice for safety-sensitive applications, high-noise industrial environments, and installations where field device faults must be contained. Across automotive assembly, oil & gas, food & beverage, and semiconductor fabrication, the 1756-OB16I is a trusted workhorse in mission-critical control panels worldwide.
Technical Specifications
- Catalog Number: 1756-OB16I
- Series: Allen-Bradley ControlLogix 1756
- Module Type: 16-Point Isolated Digital Output (D/O)
- Output Voltage Range: 10–31.2V DC
- Output Current per Point: 1A continuous
- Isolation: Point-to-point isolation (each output individually isolated)
- Backplane Current (5V DC): 100 mA
- Backplane Current (24V DC): 3 mA
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5–95% non-condensing
- Dimensions (H × W × D): 94.0 × 94.0 × 58.0 mm (3.70 × 3.70 × 2.28 in)
- Weight: Approx. 200 g
- Certifications: UL, CE, CSA, C-Tick
- Compatibility: All ControlLogix 1756 chassis (4, 7, 10, 13, 17-slot)
Note: All specifications are sourced from Rockwell Automation official documentation. Konmask.com does not modify or fabricate technical data.
Key Features & Benefits
- Point-Level Isolation: Each of the 16 output points is individually isolated, preventing a single field fault from cascading across the module — critical for high-reliability installations.
- High-Density Output: 16 outputs in a single ControlLogix slot maximizes chassis utilization and reduces overall panel footprint.
- Solid-State Switching: No mechanical contacts means longer service life, faster switching speeds, and lower maintenance overhead compared to relay-based alternatives.
- Diagnostic Capability: Supports Rockwell’s Producer/Consumer communication model, enabling real-time diagnostics and fault reporting back to the controller without additional wiring.
- Hot-Swap Compatible: Can be inserted and removed from a live ControlLogix chassis without powering down the system, minimizing maintenance windows.
- Wide Operating Temperature Range: Rated for 0–60°C, suitable for demanding industrial environments including foundries, outdoor enclosures, and process plants.
- Global Certifications: UL, CE, CSA, and C-Tick listings ensure compliance across North American, European, and Asia-Pacific markets.
Industry & Equipment Applications
- Automotive Manufacturing: Controlling solenoid valves, pneumatic actuators, and indicator lights on body-in-white and powertrain assembly lines.
- Oil & Gas: Driving shutdown valves, pump starters, and alarm annunciators in hazardous-area control panels (with appropriate barriers).
- Food & Beverage: Commanding conveyor drives, filling machine actuators, and CIP (Clean-In-Place) valve banks in hygienic processing environments.
- Semiconductor & Electronics: Precise control of process equipment outputs where electrical noise isolation is paramount.
- Water & Wastewater Treatment: Operating pump contactors, valve actuators, and chemical dosing systems in wet, corrosive environments.
- Material Handling & Logistics: Sorter diverters, conveyor zone controls, and automated storage/retrieval system (AS/RS) outputs.
- Pharmaceutical Manufacturing: Batch process control outputs requiring full audit trails and diagnostic transparency.
System Integration & Compatible Parts
The 1756-OB16I is designed to integrate seamlessly within the Rockwell Automation ControlLogix ecosystem. Compatible and commonly paired components include:
- Controllers: 1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75, 1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E
- Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
- Power Supplies: 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75
- Digital Input Modules: 1756-IB16, 1756-IB16I, 1756-IB32
- Communication Modules: 1756-EN2T, 1756-EN2TR, 1756-CN2, 1756-DHRIO
- Wiring Systems: 1492-CABLE series pre-wired cables and 1492-IFM interface modules for rapid field termination
Contact Konmask.com for cross-reference assistance and compatibility verification for your specific system revision.
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1756-OB16I module offered undergoes a rigorous multi-stage verification process before it reaches your facility:
- Source Verification: We trace each unit’s supply chain to authorized distributors, OEM surplus channels, or factory-refurbished stock — no grey-market or counterfeit sources.
- Visual & Physical Inspection: Modules are inspected for label authenticity, connector integrity, housing condition, and firmware revision markings.
- Functional Testing: Where applicable, units are bench-tested in a live ControlLogix chassis to verify all 16 output points respond correctly to commanded states.
- Packaging & ESD Protection: All modules are shipped in anti-static bags with foam cushioning and clearly labeled outer cartons to prevent transit damage.
- Documentation: Test reports and traceability records are available upon request for quality-critical procurement processes.
How to Order
- Submit an Inquiry: Contact us via email at support@konmask.com or call +0086 19859288691 with your required quantity, delivery timeline, and destination country.
- Receive a Quote: Our technical sales team will respond within 1 business day with pricing, lead time, and shipping options tailored to your project.
- Order Confirmation: Upon agreement, we issue a proforma invoice. Payment terms are discussed based on order volume and customer history.
- Shipment & Tracking: We ship via DHL, FedEx, UPS, or freight forwarder depending on order size. Full tracking information is provided upon dispatch.
- After-Sales Support: Our engineering team is available post-delivery to assist with installation 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 Sourcing Network: Access to both new and surplus Allen-Bradley inventory from verified supply chains across North America, Europe, and Asia.
- Technical Expertise: Our team includes experienced automation engineers who can advise on compatibility, firmware, and system integration — not just order takers.
- Fast Response: Inquiries answered within 1 business day. Urgent requirements handled with priority processing.
- Competitive Pricing: Direct sourcing relationships allow us to offer market-competitive pricing without compromising on authenticity.
- Worldwide Shipping: We export to 50+ countries with full customs documentation support.
Frequently Asked Questions
- Q: Is the 1756-OB16I compatible with all ControlLogix chassis sizes?
- A: Yes. The 1756-OB16I fits all standard ControlLogix 1756 chassis including the 4-slot (1756-A4), 7-slot (1756-A7), 10-slot (1756-A10), 13-slot (1756-A13), and 17-slot (1756-A17) variants.
- Q: What is the difference between 1756-OB16I and 1756-OB16?
- A: The key distinction is isolation. The 1756-OB16I provides individual point-level isolation for each of its 16 outputs, while the standard 1756-OB16 uses a common return (non-isolated). The isolated version is preferred in applications where field device faults must be contained to a single output point.
- Q: Can I hot-swap the 1756-OB16I without shutting down the ControlLogix system?
- A: Yes. ControlLogix modules support hot-swap (removal and insertion under power — RIUP). However, ensure that field devices connected to the module outputs are in a safe state before removal to prevent unintended actuation.
- Q: What firmware version does the 1756-OB16I require?
- A: The 1756-OB16I is compatible with all current ControlLogix controller firmware versions. No specific minimum firmware is required for basic I/O operation, though advanced diagnostic features may require RSLogix 5000 / Studio 5000 v20 or later.
- Q: Do you provide a warranty on the 1756-OB16I?
- A: Yes. Konmask.com provides a warranty on all modules sold. Warranty terms vary by product condition (new, surplus, refurbished). Please contact us for specific warranty details applicable to your order.
- Q: Can you supply multiple units for a large project or MRO contract?
- A: Absolutely. We handle both single-unit emergency replacements and bulk procurement for capital projects and MRO (Maintenance, Repair & Operations) contracts. Volume pricing is available.
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Contact: support@konmask.com | +0086 19859288691
