Allen Bradley 1794-IE4XOE2/B Flex I/O Module: Analog Signal Processing Expert in Industrial Automation

In the field of industrial automation, precise acquisition and control of analog signals are key to achieving efficient production. The 1794-IE4XOE2/B Flex I/O combination analog input/output module launched by Allen Bradley (Rockwell Automation) has become a core component in process control, data acquisition, and mechanical equipment control scenarios due to its high precision, flexible configuration, and distributed architecture design.

1、 Module overview: Swiss Army Knife for analog signal processing

1794-IE4XOE2/B belongs to the Flex I/O series, designed specifically for distributed control systems. Its core advantage lies in integrating 4 analog inputs and 2 analog output channels, supporting current (0-20mA/4-20mA) and voltage (± 10VDC/0-10VDC) signals, and can flexibly adapt to field devices such as sensors and actuators. The module adopts a compact DIN rail installation, supports hot plugging, and is easy to expand and maintain the system.

2、 Detailed explanation of technical parameters: balance between accuracy and speed

1. Analog input channel

Signal range:

Current: 0-20mA/4-20mA (configurable)

Voltage: ± 10VDC/0-10VDC (configurable)

Resolution:

Monopolar input: 12 bits (accuracy ± 0.025% of full scale)

Bipolar input: 11 bits+sign bit (accuracy ± 0.05% of full scale)

Conversion rate: 256 μ s/channel (successive approximation ADC)

Response time:

Voltage step: 9.4ms (reaching 63% steady-state value)

Current step: 18.2ms (reaching 63% steady-state value)

Input impedance:

Voltage mode: 100k Ω

Current mode: 238 Ω

Common mode rejection ratio:

Voltage terminal: -17dB at 3Hz, -50dB at 10Hz

Current terminal: -9dB at 3Hz, -3.5dB at 15Hz

2. Analog output channel

Signal range:

Current: 0-20mA/4-20mA (configurable)

Voltage: ± 10VDC

Resolution: 12 bits (Pulse Width Modulation DAC)

Accuracy:

At 25 ℃: ± 0.133% of full scale

At -25 ℃: ± 0.425% of full scale

Load capacity:

Voltage output: maximum 3mA driving capability

Current output: Supports loads from 0 Ω to 1k Ω

3. Electrical and Environmental Specifications

Supply voltage: 24VDC (19.2-31.2VDC range)

Power consumption: 70mA@24VDC (Typical), maximum 4W@31.2VDC

Operating temperature: -20 ℃ to 70 ℃ (XT version extended to -40 ℃ to 85 ℃)

Storage temperature: -40 ℃ to 85 ℃

Protection level: IP20 (module body), supporting terminal base protection upgrade

Mechanical dimensions: 1.8 x 3.7 x 2.1 inches (W x D x H)

3、 Core functions and application scenarios

1. Distributed Control Architecture

As part of the Flex I/O system, the 1794-IE4XOE2/B can communicate with controllers (such as ControlLogix) through EtherNet/IP, ControlNet, or DeviceNet networks, enabling flexible deployment of remote I/O sites. It supports daisy chain power connections and can expand up to 8 modules with a single adapter, making it suitable for large-scale production lines or cross regional control.

2. Process control and monitoring

Chemical industry: Collect temperature and pressure sensor signals from reaction vessels, and output control signals for regulating valves.

Water treatment: Monitor pH value, flow rate, adjust dosing pump dosage.

Energy management: Collect transformer oil temperature and current, optimize load distribution.

3. Mechanical equipment control

Packaging Machinery: Synchronize motor speed and tension sensor signals to achieve precise coil control.

Injection molding machine: Collect hydraulic system pressure, control valve opening to optimize molding cycle.

4、 Summary of Technical Advantages

High precision conversion: 12 bit resolution combined with low-noise design ensures the accuracy of signal acquisition.

Wide temperature adaptability: The XT version meets extreme industrial environment requirements, such as outdoor equipment or air-conditioned factories.

Flexible configuration: The signal type, range, and filtering parameters can be adjusted online through Studio 5000 software.

Hot swappable support: reduces system downtime and improves maintenance efficiency.

5、 Selection and compatibility

Terminal base: It needs to be used in conjunction with the 1794-TB2/TB3/TB3S/TB3T/TB3TS series base, supporting spring or screw terminals.

Network Adapter: Compatible with adapters such as 1794-AENT/ASB/ACNR, enabling different network protocol connections.

Certification standards: UL, cUL, CE, and ATEX certified, applicable to global markets and explosion-proof areas.

The Allen Bradley 1794-IE4XOE2/B module is an ideal choice for analog signal processing in industrial automation systems due to its high performance, reliability, and ease of use. Whether it is process industries that require precise control or discrete manufacturing that pursues efficient production, this module can help enterprises achieve digital transformation and intelligent upgrading through its flexible configuration and powerful network integration capabilities.

Product website:

https://www.3splc.com/1794-IE4XOE2/B_c0_ss