Description

Industrial Automation Co. is NOT an Authorized Rockwell Distributor - we have our own unique inventory and sourcing relationships. Review our Reseller notice, here.

Allen-Bradley 1794-IF8IH

The Allen-Bradley 1794-IF8IH is an input HART analog module designed to enhance data acquisition and control capabilities in industrial environments. This module ensures reliable and precise data measurement and transmission. The module is suitable for applications requiring high accuracy and robust performance. It is equipped with several advanced features.

Technical Description:

The 1794-IF8IH module features eight single-ended, isolated inputs, ensuring high-quality data acquisition without interference. It supports both unipolar and bipolar resolutions, with 16 bits for unipolar and 15 bits plus signs for bipolar.

The recommended terminal base units are 1794-TB3 and 1794-TB3S. The input current terminal can be configured for different ranges, specifically 4...20 mA or 0...20 mA. It maintains a low input current with 0 mA output until the product is configured.

The data format is versatile, offering engineering units, percent of full scale, and raw/proportional count. The conversion type used is Sigma Delta, known for its high accuracy and stability in measurement.

The module demonstrates a strong normal mode rejection ratio, exceeding 70 dB at 50/60 Hz with various ADC conversion rates. Its common mode rejection ratio also exceeds 60 dB at both 50 Hz and 60 Hz. Step response times of 99% are impressive, ranging from 4 ms to 480 ms, depending on the conversion rate.

The input resistance of the 1794-IF8IH module stands at 249 ohms with a tolerance of ±1%. Its absolute accuracy is 0.1 % of full scale at 25°C, with an accuracy drift of 0.4% full-scale over a temperature range of -55°C to 131°F.

The module is designed to withstand overloads up to 32 mA continuously on one channel at a time. It operates with an isolation voltage of 120 V (continuous) and is type tested at 1000 V AC for 60 seconds. The Flexbus current is 80 mA at 5V DC, and it has a maximum power dissipation of 4.8 W at 31.2V DC. The thermal dissipation is 16.4 BTU/hr at 31.2V DC.

Connectivity and Compatibility:

The module supports the HART 5 protocol, ensuring compatibility with various devices, including those with 2, 3, or 4 wires. The terminal base screw torque is determined by the installed terminal base. The dimensions of the module, when installed in a base, are approximately 94 x 94 x 66 mm, making it compact and space-efficient. It includes one red/green power/status indicator for clear operational status.

Standard Operating Specifications:

The module operates within a temperature range of 0°C to 55°C and can be stored in temperatures ranging from -40°C to 85°C. It maintains a relative humidity range of 5...95% non-condensing. The module can withstand vibrations of 5 g at 10...500 Hz and shocks of 20 g during operation and 25 g when non-operating.

Frequently Asked Questions:

What are the connectivity options in the Allen-Bradley 1794-IF8IH?

The Allen-Bradley 1794-IF8IH supports the HART 5 protocol. It is compatible with devices using 2, 3, or 4 wires. The terminal base screw torque is determined by the installed terminal base.

What is the resolution specification of the 1794-IF8IH module?

The 1794-IF8IH module offers a unipolar resolution of 16 bits. It also supports a bipolar resolution of 15 bits plus sign. This ensures precise data measurement and transmission.

What are the isolation and power specifications for the 1794-IF8IH?

The module features an isolation voltage of 120 V (continuous). It is type tested at 1000 V AC for 60 seconds. It has a maximum power dissipation of 4.8 W at 31.2V DC.

Product Specifications Table