Product Overview

The Allen-Bradley 1756-IG16 functions as a high-reliability digital DC input module within the signature ControlLogix architecture. This module provides 16 distinct input points engineered specifically for low-voltage 5V DC TTL (Transistor-Transistor Logic) source signals. Operating on a "Low True" logic structure, it seamlessly interfaces your high-speed electronic circuits, semiconductor processing equipment, and specialized sensors directly to the standard ControlLogix programmable automation controllers (PACs).

We guarantee this product arrives as 100% Brand New, original factory-sealed equipment, ensuring maximum operational lifespan, pristine structural integrity, and full manufacturer compliance for your critical industrial control systems.

Technical Specifications

Engineering Advantages

• High-Speed Electronic Interfacing: Standard 24V DC modules fail to register low-voltage electronic signals. The 1756-IG16 bridges this gap by directly reading 5V DC TTL signals from custom circuit boards, robotic components, and specialized laboratory instruments without requiring external voltage-matching interposing relays.

• Ultra-Low Propagation Delay: This module delivers a hardware execution speed of just 0.25 milliseconds. Combined with programmable digital filters, it registers rapid state changes instantly, making it ideal for packaging registration, high-speed sorting, and precision machine control.

• Group-to-Group Electrical Isolation: Industrial environments generate massive electrical noise. The 1756-IG16 guards your core processor backplane by implementing 250V continuous isolation between the two independent 8-point input groups, trapping dangerous ground loops and localized electrical spikes before they spread.

• Hot-Swappable Productivity: The ControlLogix chassis architecture allows Removal and Insertion Under Power (RIUP). Maintenance technicians can replace a module during live system operations, eliminating costly facility downtime during routine hardware updates.

FAQs

• Does the 1756-IG16 ship with the Removable Terminal Block (RTB)?

  No. Allen-Bradley packages all Removable Terminal Blocks separately from the I/O modules. To complete the field wiring connection for this specific module, you must purchase the 20-pin screw-clamp block (1756-TBNH) or the spring-clamp block (1756-TBSH) separately.

• What does "Low True" logic mean for the input status configuration?

  "Low True" indicates that an input channel registers an ON state (Logic 1 in the controller software) when the field-side signal voltage drops into the 0.0 to 0.8V DC range. Conversely, when the signal stays in the 2.0 to 5.5V DC range, the controller registers an OFF state (Logic 0).

• Can I mix the 1756-IG16 with standard 24V DC modules in the same chassis?

  Yes. The ControlLogix backplane isolates slot power independently. You can install the 5V DC 1756-IG16 directly alongside 24V DC, 120V AC, or analog modules in any available slot within a standard 1756 chassis without encountering voltage compatibility conflicts.