Product Summary
The 1794-OF8IH delivers eight isolated analog outputs with HART communication for critical process loops. This module provides a 16-bit digital-to-analog converter for each channel. Engineers can configure outputs for 0-20 mA or 4-20 mA signals. The module supports factory calibration and requires no jumpers or switches. This design simplifies setup and reduces installation errors.
Why Choose the 1794-OF8IH for Your Process Control System
The 1794-OF8IH solves common pain points in demanding industrial environments. It combines channel-to-channel isolation with HART pass-through capabilities. This allows simultaneous analog control and digital device diagnostics.
Each of the eight outputs operates independently with its own data format. Users can program engineering units, percent of full scale, or RAW counts per channel. The module detects lead breakages and reports overrange or underrange conditions. These alarms help operators prevent process upsets and costly downtime.
The module draws power directly from the FlexBus backplane. It requires only 80 mA at 5V DC and dissipates a maximum of 5.0 W. This low power consumption reduces thermal stress inside the control cabinet.
Step-by-Step Installation Guide for the 1794-OF8IH
Mount the 1794-OF8IH on a compatible terminal base such as the 1794-TB3 or 1794-TB3S. Rotate the keyswitch to position four before locking the module in place. The lock ensures a secure mechanical and electrical connection.
No external power supply is needed since the FlexBus provides power. Connect signal wiring according to the terminal base type you select. The module supports pass-through messages with up to two connections. Each connection can handle eight queues for efficient HART communication.
The module comes factory calibrated, so you can begin configuration immediately. Use your control software to set the output range and data format for each channel. The conversion rate of 10 milliseconds ensures fast and responsive loop control.
Logistics & Standard Packaging Details
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