Product Overview
The Allen-Bradley 1794-IE4XOE2 is a Flex I/O combination analog module engineered for distributed I/O architectures. It integrates four single-ended, non-isolated analog input channels and two single-ended, non-isolated analog output channels into one compact unit, reducing panel space and wiring complexity. This module supports current signals of 0-20 mA and 4-20 mA, as well as voltage signals of ±10 VDC and 0-10 VDC, providing flexibility across diverse industrial applications.
With a 12-bit unipolar and 11-bit plus sign bipolar input resolution, the 1794-IE4XOE2 delivers precise data acquisition. Its Pulse Width Modulation (PWM) conversion for outputs ensures stable analog control. Designed for DIN rail mounting, the module operates reliably in harsh environments, with a storage temperature range of –40…85 °C and vibration resistance of 5g @ 10 to 500 Hz.
Technical Specifications
Below are the key technical parameters for the Allen-Bradley 1794-IE4XOE2:
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Part Number |
1794-IE4XOE2 |
| Product Type |
Flex I/O High-Density Analog Module |
| Inputs |
4 single-ended, non-isolated |
| Input Current Terminal |
4-20 mA (selectable 0-20 mA) |
| Input Voltage Terminal |
±10 V (selectable 0-10 V) |
| Input Resolution |
12 bits unipolar / 11 bits plus sign bipolar |
| Outputs |
2 single-ended, non-isolated |
| Output Current Terminal |
4-20 mA (selectable 0-20 mA) |
| Output Voltage Terminal |
±10 V |
| Conversion Type |
Pulse Width Modulation (PWM) |
| FlexBus Current |
20 mA |
| Thermal Dissipation |
10.2 BTU/hr @ 31.2V DC max |
| Terminal Base |
1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS |
| Mounting |
DIN Rail |
| Storage Temperature |
–40…85 °C (–40…185 °F) |
| Vibration |
5g @ 10 to 500 Hz |
| Operating Shock |
30 g |
Real-World Applications
The Allen-Bradley 1794-IE4XOE2 excels in process control, machine monitoring, and material handling systems. For instance, in a packaging line, it can acquire analog signals from pressure transmitters (4-20 mA) and temperature sensors (±10 V) while simultaneously driving proportional valve outputs. Its mixed I/O capability simplifies wiring and reduces hardware costs.
In a water treatment facility, the module monitors flow and level inputs while controlling chemical dosing pumps. The 12-bit resolution ensures accurate measurement, and the PWM output conversion provides smooth actuator control. For legacy system upgrades, the 1794-IE4XOE2 integrates seamlessly into existing Flex I/O racks, offering a cost-effective path to expand analog capacity.
Installation & Setup
Mount the 1794-IE4XOE2 on a standard DIN rail using the appropriate terminal base (1794-TB2, -TB3, -TB3S, -TB3T, or -TB3TS). Ensure the terminal base is firmly locked into place and the module is seated correctly. Wire sizes depend on the terminal base selected; follow the terminal base manual for proper wire gauge and torque specifications.
Before powering up, verify the FlexBus connection and confirm that the module's current draw (20 mA) is within the system budget. Configure input and output ranges via the control program—no physical jumpers are required. For initial testing, use a signal simulator to validate each channel's scaling and polarity.
Maintenance & Reliability
Regular inspection of the 1794-IE4XOE2 involves checking for loose terminal connections, dust accumulation, and signs of corrosion. The module's robust design—vibration rated at 5g and shock rated at 30 g—ensures longevity in demanding environments. Operating within the specified storage temperature range prevents thermal stress.
To minimize downtime, keep spare terminal bases and fuses on hand. Periodically verify calibration accuracy using a known reference signal; the module's input impedance (100 kΩ for voltage, 238 Ω for current) remains stable over time. With proper care, the 1794-IE4XOE2 delivers years of reliable service.
Compatibility & Integration
The 1794-IE4XOE2 is a member of the Flex I/O family, compatible with Allen-Bradley controllers that support FlexBus backplane communication. It works with 1794 series terminal bases and can be integrated into distributed I/O networks using adapters like ControlNet, DeviceNet, or EtherNet/IP (depending on the adapter used). No additional configuration is required beyond standard I/O mapping.
Selection Guide & Purchasing Advice
When selecting the 1794-IE4XOE2, verify your system's FlexBus current capacity and available slot space. Ensure the terminal base model matches your wiring requirements. For applications requiring isolated channels, consider alternative modules; this unit is non-isolated.
PLC Source PRO offers the Allen-Bradley 1794-IE4XOE2 with genuine parts and fast shipping. Our technical team can assist with compatibility questions. Contact us to place your order or request a quote.