Allen Bradley 1794-IE8B/A is a high-performance analog input module in the Flex I/O system under Rockwell Automation, designed specifically for industrial automation scenarios. As the core component of the Flex I/O product series, this module achieves high-precision acquisition of voltage/current signals through 8 single ended, non isolated, user configurable channels, and is widely used in fields such as process control, equipment monitoring, and data acquisition.

1、 Detailed explanation of core parameters

● Input channel and signal range

Channel configuration: 8 single ended input channels, supporting mixed access of voltage and current signals.

Signal type:

Current input: 0-20mA, 4-20mA (industrial standard signal, suitable for sensor output).

Voltage input: ± 10VDC, 0-10VDC (compatible with various process control signals).

● Resolution and accuracy

resolving power:

Unipolar mode: 12 bits (1/4096 full-scale resolution).

Bipolar mode: 11 bits+sign bit (1/2048 full-scale resolution).

Accuracy index:

At 25 ℃: ± 0.20% full range (voltage/current input).

At 0 ℃: ± 0.25% full range (voltage input), ± 0.20% full range (current input).

Temperature drift: Voltage input ≤ 0.00428%/℃, current input ≤ 0.00407%/℃.

● Conversion rate and response time

Conversion rate: 256 μ s/channel (high-speed sampling capability).

Step response:

Voltage terminal: 9.4ms (63% step response).

Current terminal: 18.2ms (63% step response).

●  Power supply and power consumption

Power supply voltage: 10.5-31.2VDC (nominal 24VDC), compatible with industrial site power supply standards.

Current consumption: 60mA (maximum power consumption of 3W), heat dissipation of 10.2BTU/hour (at 31.2VDC).

● Environmental adaptability

Working temperature: -20 to 55 ℃ (some scenarios can reach -20 to 60 ℃).

Storage temperature: -40 to 85 ℃ (suitable for extreme environmental storage).

Humidity range: 5% -95% (non condensing state).

Mechanical strength:

Vibration: 5g (10-500Hz).

Impact: 30g in working state, 50g in non working state.

2、 Physical characteristics and installation

●  Mechanical structure

Size: 3.7 x 2.1 x 31.8 inches (compact design, saves installation space).

Installation method: Supports DIN rail installation or panel installation, compatible with various industrial cabinets.

Compatible base: 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, etc.

●  Interface and indicator lights

Input interface: Terminal base wiring, supports shielded cables to reduce electromagnetic interference.

Status indicator: Power indicator light (green) and channel indicator light (yellow, 8 channels displayed independently).

3、 Performance advantages and application scenarios

●  Performance advantages

High precision acquisition: 12 bit resolution and low temperature drift ensure data accuracy.

Wide signal range: compatible with commonly used industrial current/voltage signals, reducing signal conditioning steps.

Fast response: The conversion rate of 256 μ s/channel meets the requirements of high-speed control.

Durable and sturdy: IP20 protection level, suitable for harsh industrial environments.

●  Typical application scenarios

Process control: Flow, pressure, and temperature monitoring in industries such as chemical engineering and water treatment.

Equipment monitoring: Collecting feedback signals on motor speed, tension, and position on the production line.

Data collection: Reading data from electricity and gas meters in the Energy Management System (EMS).

The Allen Bradley 1794-IE8B/A analog input module, with its 8-channel high-precision acquisition capability, wide signal range, and industrial grade environmental adaptability, has become the preferred solution in the field of industrial automation. Whether it is process industries that require precise control or discrete manufacturing scenarios that require high real-time data, this module can provide stable and reliable signal input support, helping enterprises achieve efficient and intelligent production management.