Description
1. Product Title
Allen-Bradley 1794-IE8 – FLEX I/O Analog Input Module (8-Channel)
2. Product Overview
The 1794-IE8 is an 8-channel analog input module from the Allen-Bradley FLEX I/O family, designed for distributed I/O architectures in industrial automation systems. It enables precise acquisition of analog signals from field devices such as transmitters, sensors, and instrumentation, converting them into digital data for PLC processing.
The 1794-IE8 is widely used in modular control systems where flexibility, reduced wiring, and scalable I/O expansion are required. It supports multiple input ranges, including voltage and current signals, making it suitable for a variety of process applications. By integrating with FLEX I/O adapters, this module helps reduce panel space, simplify installation, and improve overall system efficiency in distributed control environments.
3. Technical Specifications
- Brand: Allen-Bradley
- Model: 1794-IE8
- Warranty: One Year
- Condition: 100% New & Original
- Product Type: Analog Input Module (FLEX I/O Series)
- Input Channels: 8 single-ended, non-isolated channels
- Input Types:
- Voltage: ±10V, 0–10V
- Current: 0–20 mA, 4–20 mA
- Resolution:
- Voltage: 12-bit (unipolar), 11-bit + sign (bipolar)
- Conversion Type: Successive approximation
- Conversion Rate: ~256 µs for all channels
- Input Impedance:
- Voltage: 100 kΩ
- Current: 238 Ω
- Power Supply: 24 VDC nominal (10.5–31.2 VDC), ~60 mA
- Isolation Voltage: 50V continuous (field to system)
- Mounting: FLEX I/O terminal base (e.g., 1794-TB3 series)
- Operating Temperature: 0°C to +55°C
- Dimensions: Approx. 46 × 94 × 53 mm
4. Key Features & Benefits
- Flexible Multi-Signal Input:
Supports both voltage and current ranges, allowing integration with a wide variety of field instruments without additional signal converters. - Distributed I/O Architecture:
Designed for FLEX I/O systems, enabling remote I/O deployment that reduces wiring complexity and installation costs. - Fast Data Acquisition:
With a 256 µs conversion rate, the module provides timely and accurate process data for real-time control. - Compact Modular Design:
Saves panel space and allows scalable system expansion, making it ideal for modern automation systems. - Reliable Industrial Performance:
Built for harsh environments with stable signal processing and consistent performance in process applications.
5. Application Scenarios
- Process Industries (Oil & Gas, Chemical):
Interfaces analog transmitters (pressure, flow, level) with PLC systems for precise process monitoring. - Water & Wastewater Treatment:
Collects analog signals from sensors and analyzers for real-time control of treatment processes. - Manufacturing Automation:
Used in distributed I/O setups to monitor machine parameters and ensure efficient production control.
6. Frequently Asked Questions (FAQ)
- Q: What is the primary function of the 1794-IE8?
A: It is an analog input module that collects voltage and current signals from field devices and converts them into digital data for PLC processing. - Q: Is 1794-IE8 compatible with legacy systems?
A: Yes, it is compatible with FLEX I/O architectures and can be integrated with various Allen-Bradley PLC systems via appropriate communication adapters.
