Module de sortie analogique 4 canaux (courant) VersaMax GE Fanuc IC200ALG322

Product Overview

The IC200ALG322 (IC200-ALG-322) is a high-precision, 4-channel analog output module within the GE VersaMax I/O family. It is specifically engineered to provide sourcing current signals, supporting both 0 to 20 mA and 4 to 20 mA ranges. This module is the industry standard for controlling current-driven actuators, such as variable speed drives (VFDs), proportional valves, and industrial dampers. Its 12-bit resolution ensures smooth and accurate control loops, while its compact, modular design allows for decentralized I/O placement in wastewater treatment, oil and gas, and pharmaceutical manufacturing facilities. As a mission-critical component, the IC200ALG322 ensures that digital control commands from the CPU are translated into precise physical movements in the field.

Technical Configuration

The module features four independent current-sourcing channels that share a common return. It is designed to be hosted on a VersaMax terminal base, which facilitates "Permanent Wiring"—allowing the electronics to be replaced without disconnecting field wires. The IC200ALG322 includes sophisticated internal diagnostics to monitor the health of the D/A converters and the presence of user-supplied 24 VDC power. Front-panel LED indicators provide immediate visual feedback: "OK" indicates the module is functional, while "User Power" confirms that the external 24 VDC required for the current loops is present.

Technical Specifications

Technical FAQs

How do I configure the module for 4-20 mA instead of 0-20 mA?

The range selection is handled via the software configuration in Proficy Machine Edition (or PAC Machine Edition). Once configured, the module automatically scales the internal counts (0-4000) to the selected physical current range.

Does this module require external power for the loops?

Yes. The IC200ALG322 requires an external +24 VDC "User Power" supply. This power is used to drive the current through the field loops. If this power is missing, the outputs will remain at 0 mA regardless of the PLC's logic state.

What happens to the output if the PLC is switched to STOP mode?

The behavior is configurable. You can set the channels to "Hold Last State" or "Output Default." In "Output Default" mode, you can specify a safe current value (e.g., 4 mA) that the module will output if communication with the CPU is lost.

Engineering & Installation Guide

• Loop Resistance Limits: The IC200ALG322 can drive a maximum load resistance of 850 Ohms at 24 VDC. Ensure that the combined resistance of your field device and the interconnecting cable does not exceed this value, otherwise, the module will be unable to reach the full 20 mA output.

• Shielding and Noise: Current signals are more robust than voltage signals, but shielding is still essential for high-precision loops. Terminate the cable shield at the terminal base ground and ensure it is not grounded at the actuator end to prevent ground loop interference.

• Hot-Swapping Protocol: While VersaMax supports hot-swapping, always ensure the "User Power" is switched off or the field loop is in a safe manual override before pulling the module. This prevents unexpected actuator movement or electrical arcing during the swap.