The 1794-IF8IH FLEX I/O module from Allen-Bradley delivers robust HART analog input capabilities. This device provides eight isolated, single-ended inputs for precise measurement. Engineers trust this module for its high-resolution performance in demanding applications. Its design supports both unipolar and bipolar signal processing. The module ensures accurate data conversion using Sigma-Delta technology.
Expert Technical Evaluation & Performance Review
The 1794-IF8IH module uses a Sigma-Delta conversion type for superior signal integrity. This converter architecture minimizes noise and quantization errors. The unit achieves a unipolar resolution of 16 bits. It also delivers a bipolar resolution of 15 bits plus sign. This resolution provides fine granularity for critical analog measurements.
Each of the eight inputs features full isolation to protect system integrity. The input type is single-ended and non-isolated from other inputs. The module handles unipolar and bipolar resolutions effectively. Specific voltage ranges depend on the application requirements. Engineers can configure the module for various industrial sensor types.
The external DC voltage range spans from 19.2 to 31.2 Volts DC. This range accommodates a 5% AC ripple for stable operation. The module draws a Flexbus current of 80 mA at 5 Volts DC. Maximum power dissipation is 4.8 Watts at 31.2 Volts DC. Thermal dissipation reaches 16.4 BTU per hour at the same voltage.
The module operates safely within a temperature range of 32 to 131 degrees Fahrenheit. This wide span suits harsh industrial environments. The open enclosure design facilitates heat dissipation. North American Hazardous Location Approval certifies safe use in hazardous areas.
Step-by-Step User & Installation Guide
Begin installation by mounting the 1794-IF8IH module onto a compatible terminal base. This module works specifically with the 1794-TB3 or 1794-TB3S base. Secure the module firmly to the DIN rail. Ensure the Flexbus connector aligns correctly with the base.
Next, connect the field wiring to the terminal base. Use shielded wire for all signal connections. The wire size depends entirely on the chosen terminal base. Follow wiring category 2 guidelines for signal ports. Use wiring category 3 standards for all power ports.
Apply the external DC voltage within the 19.2 to 31.2 Volt range. Verify the power supply provides less than 5% AC ripple. The module will initialize and begin scanning inputs. Check the Flexbus current draw to confirm proper operation.
The module comes factory calibrated for immediate use. Field calibration is also possible if needed. This flexibility supports unique application requirements. Calibration ensures the module maintains specified accuracy. Refer to the manual for detailed calibration procedures.
Logistics & Standard Packaging Details
This item ships from our warehouse using express delivery services. We offer shipping via FedEx, UPS, and DHL. Expect fast and reliable transit times for every order.
