Allen-Bradley 1756-IB16IF High-Speed Digital Input Module – ControlLogix Series
When a high-speed digital input module fails on the production floor, the consequences are immediate and severe. Conveyor lines lose synchronization, robotic arms miss critical trigger signals, and safety interlocks go blind — all within milliseconds. Without a reliable, timestamp-capable input module like the 1756-IB16IF, engineers are left chasing ghost faults in data that was never accurately captured in the first place. Downtime compounds, and root-cause analysis becomes guesswork.
The Allen-Bradley 1756-IB16IF occupies a specialized position within the ControlLogix 1756 platform: it is Rockwell Automation’s dedicated solution for applications where input event timing is as critical as the event itself. Designed for high-frequency signal capture with Coordinated System Time (CST) timestamping, this module is the preferred choice for motion coordination, sequence-of-events (SOE) recording, and any process where microsecond-level accuracy determines product quality or safety compliance. It is deployed across power generation, automotive assembly, oil & gas, and discrete manufacturing worldwide.
Technical Specifications
- Catalog Number: 1756-IB16IF
- Series: ControlLogix 1756
- Number of Inputs: 16 points
- Input Voltage: 10–31.2V DC (24V DC nominal)
- Input Current: 2.0 mA minimum ON state
- Timestamp Resolution: 1 ms (Coordinated System Time)
- Input Filter Time: Configurable (0–32 ms)
- Backplane Current: 75 mA @ 5V DC; 2 mA @ 24V DC
- Power Dissipation: 4.5 W maximum
- Operating Temperature: 0–60°C (32–140°F)
- Storage Temperature: -40–85°C (-40–185°F)
- Relative Humidity: 5–95% non-condensing
- Module Keying: Electronic and mechanical
- Certifications: UL, CE, C-Tick
- Form Factor: Single-slot ControlLogix chassis module
Key Features & Benefits
- Coordinated System Time (CST) Timestamping: Each input transition is tagged with a 1 ms resolution timestamp synchronized across the ControlLogix backplane, enabling precise sequence-of-events analysis without external time-stamping hardware.
- 16 Independent High-Speed Inputs: All 16 channels operate independently with configurable filter times, allowing mixed-speed signal capture within a single module slot.
- Configurable Input Filters: Adjustable from 0 to 32 ms per channel to suppress contact bounce or noise without sacrificing response speed on critical channels.
- Diagnostic Data: Built-in diagnostics report open-wire faults and field-side power loss, reducing mean time to repair (MTTR) significantly.
- Single-Slot Density: 16 points in one chassis slot maximizes I/O density in space-constrained control panels.
- Hot-Swap Capable: Modules can be removed and replaced under power in a redundant ControlLogix system, supporting zero-downtime maintenance strategies.
- RSLogix 5000 / Studio 5000 Native Integration: Full tag-based programming support with no additional configuration drivers required.
Industry & Equipment Applications
- Power Generation & Utilities: Sequence-of-events (SOE) recording for protective relay operations and breaker trip analysis.
- Automotive Assembly: High-speed part-present detection, robotic trigger signals, and press cycle monitoring.
- Oil & Gas: Safety instrumented system (SIS) input capture with timestamped event logs for regulatory compliance.
- Discrete Manufacturing: Encoder index pulse capture, conveyor jam detection, and high-speed gate/limit switch monitoring.
- Water & Wastewater: Pump run/fail status with timestamped alarms for SCADA integration.
- Mining & Minerals: Crusher and conveyor protection systems requiring fast, reliable digital input response.
System Integration & Compatible Parts
The 1756-IB16IF is designed to operate within the Allen-Bradley ControlLogix 1756 ecosystem. Compatible and commonly paired components include:
- Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
- Power Supplies: 1756-PA72, 1756-PB72, 1756-PA75R (redundant)
- Controllers: 1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75, 1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E
- Communication Modules: 1756-EN2T, 1756-EN2TR, 1756-CN2R (ControlNet)
- Wiring Systems: 1492-IFM series interface modules and pre-wired cables for rapid field termination
- Complementary Output Modules: 1756-OB16I, 1756-OB16IS (high-speed isolated output counterparts)
Our Quality Assurance Process
Every 1756-IB16IF unit sourced and supplied by Konmask.com undergoes a structured verification process before shipment:
- Authenticity Verification: Visual inspection of Rockwell Automation labeling, date codes, and firmware revision markings against known-good references.
- Functional Pre-Check: Where applicable, modules are bench-tested in a live ControlLogix chassis to confirm backplane communication and input channel response.
- Packaging Integrity: Anti-static packaging with humidity indicators; outer carton sealed and labeled with catalog number, serial reference, and inspection stamp.
- Documentation: Certificate of conformance available upon request; traceability records maintained for 3 years.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page or email support@konmask.com.
- Provide your required quantity, delivery timeline, and destination country.
- Our team will respond with availability confirmation, lead time, and a formal quotation within 1 business day.
- Upon PO acceptance, we arrange secure packaging and international freight with full tracking.
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation: We focus exclusively on PLC, DCS, and automation hardware — not a generalist marketplace.
- ✅ Global Supply Network: Access to both new and surplus-tested inventory across Allen-Bradley, Siemens, Schneider, ABB, and more.
- ✅ Fast Response: RFQ responses within 24 hours; urgent orders prioritized.
- ✅ Secure International Shipping: DHL, FedEx, and UPS express options with full export documentation support.
- ✅ Technical Support: Our team includes experienced automation engineers who can advise on compatibility, firmware, and system integration.
- ✅ Transparent Sourcing: We disclose product condition (new, surplus-tested, refurbished) clearly on every quotation.
Frequently Asked Questions
Q: What is the difference between the 1756-IB16IF and the standard 1756-IB16?
A: The 1756-IB16IF adds Coordinated System Time (CST) timestamping to each input transition, enabling sequence-of-events recording with 1 ms resolution. The standard 1756-IB16 does not provide timestamped input data and is intended for conventional discrete input applications without timing requirements.
Q: Can the 1756-IB16IF be used in a ControlLogix redundancy system?
A: Yes. The module is compatible with ControlLogix redundancy configurations. It supports hot-swap replacement, and its timestamped data is accessible to both primary and secondary controllers via the redundancy synchronization mechanism.
Q: What firmware version of the controller is required to use the timestamp feature?
A: The CST timestamp feature requires a ControlLogix controller running RSLogix 5000 v16 or later (Studio 5000 Logix Designer v21+ recommended). Consult Rockwell Automation publication 1756-UM058 for full firmware compatibility details.
Q: Do you supply new or surplus units?
A: We supply both. All surplus units are functionally tested and clearly identified as such on the quotation. New factory-sealed units are available subject to stock. Please specify your preference in your RFQ.
Q: What is the lead time for the 1756-IB16IF?
A: Lead time varies by stock availability. In-stock units typically ship within 2–5 business days after PO confirmation. For urgent requirements, contact us directly for expedited options.
Q: Can you provide a Certificate of Conformance (CoC)?
A: Yes. A CoC is available upon request for all shipments. Traceability documentation is maintained for a minimum of 3 years.
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