Product Details
Overview
The Allen-Bradley 1756-IB16D is a 16-point diagnostic digital input module designed for the ControlLogix platform. It provides real-time status monitoring and fault detection for DC input signals within a 10–30V DC operating range. Each channel features diagnostic capability for detecting open-wire, short-circuit, and load anomalies, enabling predictive maintenance and minimizing downtime in industrial automation systems.
Technical Specifications
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Model / Part Number: 1756-IB16D
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Brand: Allen-Bradley
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Manufacturer: Rockwell Automation
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Product Line: ControlLogix
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Product Type: Diagnostic Digital DC Input Module
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Number of Inputs: 16 channels (individually diagnostic)
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Input Type: DC sink
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Nominal Input Voltage: 12–24V DC
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Operating Voltage Range: 10–30V DC
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Input Delay Time: 4 ms hardware delay + user-selectable filter
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Diagnostic Capabilities: Open-wire, no-load, and short-circuit detection
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Backplane Current (5V DC): 150 mA
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Power Dissipation (max): 5.8 W @ 60°C (140°F)
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Isolation Voltage: 250V continuous, input-to-backplane and channel-to-channel isolation
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Compatible Terminal Blocks: 1756-TBCH or 1756-TBS6H removable terminal blocks
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Module Keying: Electronic, software configurable
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Enclosure Type: Open-style (for ControlLogix chassis mounting)
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Operating Temperature: 0°C to 60°C (32°F to 140°F)
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Storage Temperature: -40°C to +85°C (-40°F to +185°F)
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Humidity: 5–95% non-condensing
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Shock Rating: 30 g operating, 50 g non-operating
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Vibration: 10–500 Hz, 2 g peak
Key Features
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Integrated diagnostics for improved fault detection and maintenance efficiency
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16 individually monitored inputs with time-stamped event tracking
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Compatible with ControlLogix chassis for easy system integration
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User-configurable input filters to optimize performance in noisy environments
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Robust isolation for reliable operation in industrial conditions
Applications
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Factory automation and production line control
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Input signal monitoring for DC sensors and limit switches
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Predictive maintenance and condition monitoring systems
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Control panels and distributed I/O architectures
FAQs
Q1: What makes the 1756-IB16D different from standard input modules?
The 1756-IB16D offers built-in diagnostics such as open-wire and short-circuit detection, providing advanced fault analysis compared to standard DC input modules.
Q2: Which removable terminal blocks are compatible with this module?
It supports the 1756-TBCH (36-position cage clamp) and 1756-TBS6H (36-position spring clamp) terminal blocks.
Q3: Can the module operate in high-temperature environments?
Yes. It operates reliably up to 60°C (140°F), suitable for industrial control panels and enclosures.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.