IC693ALG391 GE PLC Analog Current Output | 4-20mA 1-Slot Unit

Product Overview

The GE Fanuc IC693ALG391 is a 2-channel analog current output module specifically designed for the Series 90-30 Programmable Logic Controller system. This module converts digital data from the PLC CPU into high-resolution 4-20 mA analog signals, providing precise control over field devices such as variable speed drives, control valves, and industrial strip chart recorders. With its compact 1-slot design and robust electrical isolation, the IC693ALG391 is an essential component for high-accuracy closed-loop control applications.

Technical Specifications

Core Technical Advantages

Precise Signal Linearity

The IC693ALG391 is factory-calibrated to maintain a consistent 4µA per count, ensuring excellent linearity throughout the entire 4-20 mA spectrum. This precision allows for smooth ramping of motor speeds and fine-tuned valve positioning, reducing process variability and mechanical wear on field equipment.

High-Speed Response

With an update rate of just 5 ms for both output channels, this module is built for high-performance motion and process control. This fast conversion rate ensures that changes in the PLC control algorithm are reflected in the field almost instantly, supporting highly responsive system feedback loops.

Enhanced Industrial Safety

To protect the central Series 90-30 CPU and other I/O modules, the IC693ALG391 provides a 1500 VAC isolation barrier. This feature prevents electrical noise, ground loops, and accidental high-voltage transients on the field side from migrating back into the sensitive logic-side backplane.

Installation & Maintenance

• External Power: The module requires an external user supply voltage between 20 and 30 VDC. A stable 24 VDC supply is recommended for maximum accuracy and performance.
• Compact 1-Slot Design: Designed to fit any standard Series 90-30 I/O slot, its space-saving 1-slot width allows for a high concentration of control signals within a small cabinet footprint.
• Thermal Resilience: Built to operate reliably in harsh environments, the module supports a temperature range of -20°C to 60°C, ensuring consistent output signals regardless of ambient conditions.

Engineering Advantages

The IC693ALG391 is a robust solution for engineers who require dependable 4-20 mA current loops. Despite its high performance, it maintains low power consumption, reducing the thermal load within the PLC enclosure. Weighing just 0.5 kg, its lightweight yet durable construction makes it easy to integrate into both stationary and mobile industrial platforms, providing the long-term reliability expected of GE Fanuc industrial hardware.

Technical FAQs

Q1: Does this module support voltage output?
A1: No, the IC693ALG391 is specifically designed for current output (4-20 mA). For voltage applications, a different Series 90-30 analog module would be required.

Q2: What happens if the external 24V power supply fails?
A2: The module requires external power to drive the current loops. If external power is lost, the output channels will drop to 0 mA and the module will likely trigger a diagnostic fault in the PLC software.

Q3: Can the channels be configured for 0-20 mA output?
A3: The IC693ALG391 is primarily optimized for 4-20 mA. While data scaling can be performed in the PLC logic, the hardware calibration is tuned for the 4-20 mA standard for maximum resolution.