Industrial Automation Solution – Allen-Bradley 1756-IB16/A | ControlLogix Series
Where This Product Is Used
The Allen-Bradley 1756-IB16/A is a 16-point, 24VDC sinking digital input module designed for the Rockwell Automation ControlLogix platform. It is widely deployed across demanding industrial environments where reliable discrete signal acquisition is critical:
- Automotive Manufacturing – Body-in-white assembly lines, robotic welding cells, and conveyor interlocks where high-speed sensor feedback is essential.
- Oil & Gas Processing – Wellhead control panels, pipeline valve position monitoring, and compressor station safety circuits.
- Water & Wastewater Treatment – Pump run/fault status, level switch inputs, and SCADA-integrated lift station control.
- Food & Beverage – Packaging line machine guarding, product presence detection, and CIP cycle monitoring.
- Pharmaceutical – Batch reactor interlocks, isolator door status, and FDA 21 CFR Part 11-compliant process control loops.
- Material Handling & Logistics – Sorter divert confirmation, pallet conveyor end-of-travel sensing, and AGV docking verification.
Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1756-IB16/A |
| Series | ControlLogix (1756) |
| Module Type | Digital Input (Sinking) |
| Number of Points | 16 |
| Input Voltage Range | 10–31.2 VDC |
| Nominal Input Voltage | 24 VDC |
| Input Current (ON state) | 8 mA @ 24 VDC |
| ON-State Voltage Min | 10 VDC |
| OFF-State Voltage Max | 5 VDC |
| Input Delay (OFF to ON) | 1 ms hardware filter |
| Backplane Current 5V | 75 mA |
| Backplane Current 24V | 2 mA |
| Operating Temperature | 0 to 60 deg C |
| Storage Temperature | -40 to 85 deg C |
| Relative Humidity | 5 to 95% non-condensing |
| Wiring Type | Removable Terminal Block (RTB) |
| Isolation Voltage | 100 VAC continuous, group isolated |
| Weight | 220 g approx. |
| Dimensions H x W x D | 94.0 x 94.5 x 58.4 mm |
Why Engineers Specify This Model
- Proven ControlLogix Ecosystem Compatibility – Slots directly into any 1756 chassis (4, 7, 10, 13, or 17-slot) without additional adapters or configuration bridges.
- Group Isolation Architecture – Two isolated groups of 8 inputs allow mixed-voltage field devices on a single module, reducing wiring complexity.
- Configurable Input Filter Times – Software-selectable filter delays (0 to 32 ms) via Studio 5000 Logix Designer enable noise immunity tuning without hardware changes.
- Diagnostic Data in the Tag Database – Module fault, communication fault, and field-side power status are exposed as controller tags for seamless HMI alarming.
- High Noise Immunity – Meets IEC 61000-4 EMC standards, suitable for environments with variable-frequency drives and high-current switching loads nearby.
- Series /A Revision – Baseline production revision with full Rockwell Automation firmware support and long-term spare parts availability.
Complete System Bill of Materials
To build a complete ControlLogix I/O node around the 1756-IB16/A, the following components are typically required:
- 1756-A7 / 1756-A10 / 1756-A17 – ControlLogix chassis (7, 10, or 17-slot)
- 1756-PA72 / 1756-PB72 – ControlLogix power supply (120/240 VAC or 18 to 32 VDC)
- 1756-L7x / 1756-L8x – ControlLogix L7 or L8 controller
- 1756-EN2T / 1756-EN3TR – EtherNet/IP communication module
- 1756-TBCH / 1756-TBS6H – Removable terminal block (cage clamp or screw)
- 1756-IB16/A – This module (16-point 24VDC digital input)
- 1756-OB16E – Companion 16-point 24VDC digital output module (electronically fused)
Compliance & Industry Standards
- UL Listed (UL 508)
- CE Marked – EN 61131-2, EN 61000-6-2, EN 61000-6-4
- IEC 61131-2 Programmable Controllers – Equipment Requirements and Tests
- RCM (C-Tick) – Australian/New Zealand EMC compliance
- ATEX / IECEx – Suitable for Zone 2 hazardous locations per Rockwell Automation publication 1756-IN572
- RoHS Compliant
Quality Assurance & Sourcing
Every 1756-IB16/A unit offered through Konmask.com undergoes a structured verification process before dispatch:
- Visual Inspection – Enclosure, label, connector pins, and backplane edge connector examined for damage or counterfeit indicators.
- Firmware & Revision Verification – Series letter and firmware revision confirmed against Rockwell Automation product lifecycle records.
- Functional Bench Test – Module seated in a live 1756 chassis; all 16 input points exercised with a 24 VDC test signal and verified via Studio 5000 tag monitor.
- Anti-Static Packaging – Shipped in ESD-safe bags with foam cushioning inside double-wall corrugated cartons.
- Traceability – Serial number and date code logged against each order for full supply-chain traceability.
How to Source This Part
- Add to Cart – Click Add to Cart above and proceed to checkout. We accept T/T bank transfer, PayPal, and major credit cards.
- Request a Quote – For volume orders (5+ units) or project BOM pricing, email support@konmask.com with your required quantity and delivery timeline.
- Lead Time – In-stock units ship within 1 to 3 business days. Large quantity orders may require 5 to 10 business days.
- Export Documentation – We provide commercial invoice, packing list, and certificate of origin for international shipments. HS Code: 8537.10.
- Technical Pre-Sales Support – Our engineers are available via WhatsApp/WeChat at +0086 19859288691 to confirm compatibility with your existing ControlLogix system.
Application-Specific FAQ
Q: Is the 1756-IB16/A compatible with ControlLogix L8x (v32+) controllers?
A: Yes. The 1756-IB16/A is fully compatible with all ControlLogix L6x, L7x, and L8x controllers running Logix firmware v16 and above. No module firmware update is required.
Q: Can I mix 1756-IB16/A with 1756-IB16D (diagnostics) in the same chassis?
A: Yes. Both modules occupy a single chassis slot and share the same backplane protocol. The /A variant provides standard input functionality; the /D variant adds per-point open-wire diagnostics at a higher cost.
Q: What terminal block do I need to order separately?
A: The 1756-IB16/A ships without a terminal block. Order 1756-TBCH (36-pin cage clamp) or 1756-TBS6H (36-pin screw) depending on your wiring preference.
Q: Is this module suitable for NPN (sinking) sensors?
A: Yes. The 1756-IB16/A is a sinking input module, making it directly compatible with NPN-output proximity sensors, photoelectric sensors, and limit switches commonly used in Asian and European machine designs.
Q: What is the difference between Series /A and Series /B?
A: Series /A is the original production revision. Series /B introduced minor PCB revisions for improved EMC performance. Both are functionally interchangeable and supported by current Rockwell Automation firmware.
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