GE Fanuc IC200ALG326H

Technical Specifications

• Manufacturer: GE Fanuc / GE Intelligent Platforms (Now part of Emerson Automation)

• Product Type: Analog Current Output Module

• Number of Channels: 8 (Single-ended, grouped together)

• Output Signal Types: Current (Sourcing)

• Output Ranges:

  • 0 to 20 mA (Jumper-selectable)

  • 4 to 20 mA (Default / Jumper-selectable)

• Resolution: 13-bit

• Update Rate: 15 milliseconds (All channels)

• Load Impedance: 0 to 600 Ohms (Typical for current loops)

• Isolation:

  • Group Isolation (Channels are in one group, not individually isolated)

  • 250 VAC continuous, 1500 VAC for 1 minute

• Power Consumption:

  • Backplane Current: 50 mA maximum at 5 VDC

  • External Power Supply: 18 to 30 VDC

• LED Indicators:

  • FLD PWR (Field Power Indicator)

  • OK (Module Operational Status)

• Operating Temperature:

  • Standard Range: 0°C to 60°C

  • Extended Range: -40°C to 70°C (Depending on configuration)

Functional Features

• High-Resolution Control: The 13-bit resolution provides precise granularity for the 4-20 mA or 0-20 mA signals, allowing for fine adjustments in critical process parameters

• Jumper-Configurable Ranges: Users can physically configure the module using jumpers to switch between the standard 4-20 mA range and the 0-20 mA range, providing compatibility with different sensor and actuator standards

• Programmable Default States: The module supports configurable fail-safe behavior. In the event of a loss of communication with the PLC or backplane power, the outputs can be programmed to either hold their last valid state or default to a predetermined safe value (usually 0 mA)

• Fast Update Rate: With a total update time of 15 ms for all 8 channels, the module is capable of handling dynamic process loops that require rapid response times

• Hot Swappable Capability: The module supports insertion and removal under power (Hot Swapping) without shutting down the entire system, provided proper installation procedures are followed. This minimizes downtime during maintenance or replacement

• Diagnostic Feedback: Incorporates built-in diagnostics that monitor the output status, helping operators quickly identify open circuits or field power failures via the front-panel LEDs

Applications Scenarios

Process Industries (Chemical & Petrochemical)
Used extensively for the precise regulation of chemical reactors. In a refinery, the module receives a digital command from the PLC to position a control valve, adjusting the flow of corrosive liquids. It ensures the 4-20 mA signal proportionally controls the valve position to maintain specific mixture ratios or temperatures

HVAC and Building Automation
Controls large-scale commercial air handling units (AHUs) and boilers. It sends analog current signals to modulate the speed of supply fans or the opening percentage of chilled water valves, directly linking temperature sensor feedback to mechanical output to maintain comfortable indoor environments

Metals and Mining
Manages heavy-duty variable frequency drives (VFDs) controlling conveyors or crushers. By outputting a 4-20 mA signal to the VFD, the IC200ALG326H dictates the torque and speed of large electric motors, ensuring smooth starts and stops while protecting mechanical components from stress

Water and Wastewater Treatment
Governs chemical dosing pumps for additives like chlorine or pH balancers. As flow rates change in the main line, the PLC calculates the required chemical volume; this module transmits the exact current to the metering pumps to inject the precise amount of chemical into the water stream

Power Generation
Utilized in balance-of-plant controls, such as governing the position of fuel valves on auxiliary boilers or controlling the excitation systems on smaller generators. Its isolation rating protects sensitive control electronics from the high electrical noise found in switchgear rooms