Allen-Bradley 1756-OB16IEF ControlLogix DC Digital Output Module

Product Overview

The Allen-Bradley 1756-OB16IEF delivers precise and protected DC switching for ControlLogix automation systems. This 16-point digital output module features electronically fused outputs, eliminating the need for external fuses and simplifying panel wiring. It operates within a 10-30V DC range and provides 2 Amps of current per point at 30°C. The module integrates seamlessly with RSLogix 5000 or Studio 5000 software for advanced diagnostics and configuration. We supply this item as a 100% Brand New, factory-sealed unit.

Part Number Breakdown

• 1756: Identifies the ControlLogix platform and chassis type.

• OB: Denotes the Output module category.

• 16: Specifies the number of I/O points (16 outputs).

• IEF: Indicates the specific feature set (Electronically Fused DC output).

Technical Specifications

Engineering Advantages

Electronic Fusing and Diagnostics
The 1756-OB16IEF replaces traditional mechanical fuses with advanced electronic fusing on each output point. This feature protects your field wiring and connected devices from overcurrent conditions without requiring manual fuse replacement. The module provides detailed diagnostic data to the controller, allowing you to instantly identify short circuits or overload faults directly from your HMI or programming software.

High-Density DC Switching
This module efficiently manages 16 independent DC outputs within a single ControlLogix slot. Each point handles up to 2 Amps at 30°C, making it suitable for driving solenoid valves, indicator lights, and small motor contactors. The high point density reduces the overall footprint of your control panel by minimizing the number of required I/O modules.

Flexible Wiring and Isolation
The unit requires a removable terminal block (RTB), compatible with models 1756-TBCH and 1756-TBS6H, for quick installation and replacement. With a continuous isolation voltage of 50 Volts, the module effectively separates field-side noise from the sensitive ControlLogix backplane, ensuring stable logic execution in electrically noisy industrial environments.

FAQs

Q: What is the maximum current rating for a single output point?
A: Each output point can handle a maximum of 2 Amps when the ambient temperature is at 30°C. If the temperature rises to 60°C, the maximum rating per point derates to 1 Amp to ensure safe operation.

Q: Does this module require external fuses for protection?
A: No. The 1756-OB16IEF features built-in electronic fusing for every output point. This eliminates the cost and maintenance associated with replacing blown physical fuses and provides faster, more accurate fault detection.

Q: Which removable terminal blocks (RTBs) are compatible with this module?
A: This module requires a separate removable terminal block for field wiring. It is compatible with the 1756-TBCH and 1756-TBS6H RTBs. Note that the RTB is typically sold separately.

Q: What voltage range does this output module support?
A: The module operates on a DC voltage range of 10 to 30 Volts. This wide range provides flexibility when integrating with various 12V and 24V industrial control circuits.