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

Description

The Allen-Bradley 1794-IC16 is a high-density, 16-channel digital DC input module engineered for the FLEX I/O 1794 platform. This module is specifically designed to interface with 48 VDC control logic, making it an ideal solution for distributed monitoring in environments where higher voltage loops are required to mitigate line drop over long cable runs. By utilizing a sinking input architecture, the 1794-IC16 provides reliable signal monitoring for heavy industrial applications, including power substations, railway signaling, and large-scale mining operations.

Features

• 16-Channel Sinking Input: Provides 16 non-isolated sinking input channels for high-voltage DC control loops.
• Wide Voltage Range: Operates within a 30 to 60 VDC range, ensuring compatibility with standard 48 VDC industrial control signals.
• Robust Isolation: Features a dielectric isolation rating of 1900 VDC to protect backplane logic from field-side electrical transients.
• Configurable Filtering: Supports programmable input filter times to effectively suppress contact bounce and manage signal noise in electrically noisy environments.
• Status Monitoring: Integrated yellow LED indicators for each channel provide immediate visual confirmation of input logic states.

Technical Specifications

Installation Guidelines

• Power Down: Always disconnect power from the FLEX I/O backplane before installing or removing the module to prevent electrical damage.
• Keyswitch Alignment: Ensure the module keyswitch is set to position 2 to match the corresponding terminal base.
• Terminal Base Compatibility: Use only with compatible 1794 terminal bases such as the 1794-TB3S or 1794-TB3SK.
• Grounding: Ensure the DIN rail is properly grounded to provide a common reference and minimize EMI susceptibility.
• Wiring: Use shielded cables for long runs to prevent signal interference and ensure proper termination at the terminal base.

FAQ

What is the primary function of the 1794-IC16?

The 1794-IC16 is a 48 VDC digital input module used to monitor high-voltage field signals and convert them into logic levels for the FLEX I/O system, primarily used to reduce signal loss over long distances.

Is this module isolated?

The 16 channels are non-isolated from each other, but the module features a high dielectric isolation barrier (1900 VDC) between the field-side inputs and the internal backplane logic.

What terminal bases are compatible with this module?

This module is designed to mount onto standard 1794 FLEX I/O terminal bases, including the 1794-TB3S and 1794-TB3SK series.