Allen-Bradley 1794-IC16 Flex I/O Input Module 48V DC

Product Introduction

The 1794-IC16 is a high-density digital input module from the Allen-Bradley Flex I/O family. It captures status signals from field devices like sensors, pushbuttons, and switches in demanding industrial environments. Its 16 non-isolated sinking inputs accept a broad voltage range, ensuring compatibility with various 48V DC control systems. This module simplifies system expansion and offers flexible mounting options. It provides a reliable solution for users who need to increase I/O capacity efficiently.

Technical Specifications

The Allen-Bradley 1794-IC16 module features specific electrical characteristics that guarantee reliable performance. Its key parameters ensure accurate signal detection within the defined operational window. For instance, the on-state voltage operates between 30V DC and 60V DC, with a nominal value of 48V DC. The on-state current ranges from a minimum of 2.0 mA at 30V DC to a maximum of 7.0 mA at 60V DC. Additionally, the module specifies a maximum off-state voltage of 10V DC.

Furthermore, this input module offers a nominal input impedance of 11 kΩ. It draws a FlexBus current of 25 mA at 5V DC. Meanwhile, the maximum power dissipation reaches 6.4W at 60V DC, which translates to a thermal output of 22 BTU/hr. Therefore, users should consider adequate cabinet ventilation to manage this heat output. Moreover, the module features a configurable input filter that helps reject electrical noise. Specifically, users can set the filter time anywhere from 0.25 ms to 32 ms through the controller software.

Installation and Mechanical Specifications

Installing the 1794-IC16 requires a compatible 1794 terminal base, such as the 1794-TB3 or 1794-TB3S models. First, rotate the keyswitch to position 2 before you seat the module onto the base. Next, ensure the flexbus connector extends fully to the left to establish communication with adjacent base units. After that, press firmly on the module until the latching mechanism clicks securely into place. For mounting flexibility, this unit supports both DIN rail and screw attachment methods.

In terms of physical dimensions, the module measures approximately 94 x 94 x 69 mm (HxWxD). Consequently, its compact footprint conserves valuable space inside control cabinets. The front panel features 16 yellow status indicators, each one directly tied to a specific input channel. These LEDs provide immediate visual feedback for troubleshooting and diagnostics. Besides that, the module carries a T3 temperature code and suits Pollution Degree 2 environments. However, remember that its open-style enclosure requires installation inside a protective cabinet to meet safety standards.

Configuration and Application

Configuring the 1794-IC16 involves selecting an appropriate input filter time via the output image table. For example, users can choose from preset values like 0.25 ms, 0.5 ms, 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, or 32 ms. This flexibility allows you to tailor the module's response to specific field conditions. Specifically, longer filter times reduce susceptibility to transient spikes, while shorter settings enable faster signal detection. For power connections, tie the +V DC supply to terminal C-34 and the common return to terminal B-16.

Moreover, this Flex I/O module supports removal and insertion under power, commonly known as RIUP. This feature permits module replacement without shutting down the entire control system. Therefore, maintenance tasks become simpler and cause less production disruption. Additionally, the 1794-IC16 holds ATEX Zone 2 and Class I Division 2 certifications for hazardous locations. Consequently, it suits a wide array of industries, including oil and gas, chemical processing, and manufacturing. Always follow local wiring codes and safety guidelines during installation.

Packaging and Shipping Information

Each Allen-Bradley 1794-IC16 module arrives in an individual package designed for safe transport. The carton contains the module itself and a printed installation instruction sheet. Furthermore, the module comes enclosed in an anti-static bag to guard against electrostatic discharge during handling. These protective measures ensure the unit reaches you in perfect working condition.

For shipping, we utilize trusted global carriers such as FedEx, UPS, and DHL. Therefore, you can expect reliable delivery with real-time tracking options. We process orders promptly to minimize any potential downtime at your facility. Meanwhile, our team remains available to address any special shipping requirements you may have. Ultimately, we aim to deliver your critical I/O component swiftly and securely.

Frequently Asked Questions (FAQ)

1. What is the nominal input voltage for the 1794-IC16?
The nominal input voltage for the Allen-Bradley 1794-IC16 module is 48V DC. It accepts inputs ranging from 30V DC to 60V DC.

2. Can this module operate in hazardous environments?
Yes, the 1794-IC16 carries both ATEX Zone 2 and Class I Division 2 certifications. Therefore, it suits installation in many hazardous industrial areas.

3. Which terminal bases work with this module?
The 1794-IC16 fits several terminal base models. These include the 1794-TB3, 1794-TB3S, 1794-TB3K, and 1794-TB3SK.

4. How do I set the input filter time?
You set the input filter time through the controller's output image table. Specifically, you can select values from 0.25 ms up to 32 ms.

5. What is the shipping weight of this module?
The approximate shipping weight for the 1794-IC16 module is about 0.1 kg. This lightweight design simplifies handling and reduces shipping costs.