Allen-Bradley 1746-OG16 SLC 500 Digital DC TTL Output Module

Why Choose the 1746-OG16 for Your TTL Output Needs?

When your industrial control system demands reliable TTL-level output switching, the Allen-Bradley 1746-OG16 delivers precise performance. This SLC 500 digital DC TTL output module handles sixteen channels with a 5V DC sink voltage range of 4.5-5.5V DC, making it ideal for driving TTL loads and sink-load displays. But what makes this module stand out in demanding environments? Let's explore its key features and applications.

Product Overview

The Allen-Bradley 1746-OG16 is a digital DC TTL output module from the SLC 500 series by Rockwell Automation. It provides sixteen (16) TTL outputs with a voltage range of 4.5-5.5 Volts DC. This single-slot module connects directly to the SLC 500 chassis backplane, receiving power for its electronic circuitry. An external 5VDC power supply enables the output circuitry, and all sixteen channels share a single common terminal at the +VDC terminal. The module uses inverted logic, so a NOT instruction in your program negates this naturally inverted logic for proper operation.

Technical Specifications Breakdown

Outputs: 16 channels, each sourcing 0.024 amps (24 mA) continuous current per point, with a total module current of 0.384 amps.

Voltage Range: 4.5-5.5V DC sink, with a maximum 50 mV peak-to-peak ripple. Off-state voltage is also 4.5-5.5V DC, and maximum off-state leakage current is 0.1 mA.

Backplane Current: 180 milliamps at 5V; no backplane current at 24V.

Signal Delays: Step response is 60 milliseconds in and 2.5 milliseconds out. Signal delay ON is 0.25 mA, and signal delay OFF is 0.50 mA.

Environmental Ratings: Operating temperature from -13 to 140°F (-25 to 60°C), non-operating from -40 to 185°F (-40 to 85°C) at 5-95% relative humidity without condensation. Vibration tolerance: 2g at 10-500 Hz and 2.5g at 57-2000 Hz; operating shock: 30g.

Industry Applications

TTL Load Switching

The 1746-OG16 excels in applications requiring TTL-level output switching, such as driving digital displays, indicator lights, or low-power logic circuits. Its 24 mA per channel output ensures reliable switching for standard TTL loads.

Sink-Load Display Control

For sink-load displays common in industrial panels, this module provides the precise 5V DC sink voltage needed. The inverted logic feature simplifies integration with existing TTL-based display systems, reducing programming complexity.

Installation & Setup Guidance

Install the 1746-OG16 into any single slot of an SLC 500 chassis. Ensure the chassis backplane provides 5V power. Connect an external 5VDC power supply to the +VDC terminal for output circuitry. All sixteen outputs share this common terminal. In your programming software, use a NOT instruction to invert the naturally inverted logic. The data table allows monitoring and forced activation of individual channels, viewable in binary, decimal, octal, or hexadecimal formats. Always disconnect power before installing or removing the module.

Maintenance & Reliability

This module is designed for industrial environments with pollution level no higher than Pollution 2 (per EN/IEC0664-1). Regularly inspect the module for dust or debris buildup. Ensure the enclosure remains accessible only to authorized personnel. Do not disconnect equipment unless power is removed and the area is known to be non-hazardous. Follow the manufacturer's guidelines for periodic testing to verify proper operation.

Selection Guide & Purchasing Advice

Before purchasing the 1746-OG16, verify your SLC 500 chassis compatibility and available slot. Confirm your application requires 5V DC TTL sink outputs with 24 mA per channel. For complete technical specifications and current availability, contact BluePLC Industrial. We stock genuine Allen-Bradley modules and can advise on lifecycle status and replacement options if needed.