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General Electric IS200ACLEH1A Application Control Layer Module Item NO.: 2907247

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Product Name	General Electric IS200ACLEH1A Application Control Layer Module
Item NO.	2907247
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	GE
Brand	GE
Creation Time	2026-09-11

General Electric

IS200ACLEH1A

Application Control Layer Module

Mark VIe / EX2100

Excitation Control · Quad-Core · SIL 2/3

Product Overview

The IS200ACLEH1A is an Application Control Layer Module (ACLE) from GE's Mark VIe / EX2100 Excitation Control System. It serves as the primary processing unit for high-level control logic and excitation regulation.

The module executes complex control algorithms, manages communication between I/O packs and the supervisory network, and provides the computational backbone for stable generator excitation. It features a quad-core AMD G-series processor running at 1.2 GHz with a QNX Neutrino real-time operating system.

With an MTBF exceeding 414,000 hours and SIL 2/3 safety compliance, the IS200ACLEH1A is designed for safety-critical applications in power generation, including gas turbine and steam turbine control systems.

Technical Specifications

Parameter	Value
Brand	General Electric (GE)
Model	IS200ACLEH1A
Type	Application Control Layer Module (ACLE)
Country	United States
Series	Mark VIe / EX2100 Excitation Control
Processor	Quad-Core AMD G-Series, 1.2 GHz
Operating System	QNX Neutrino RTOS
Safety Level	SIL 2 / SIL 3 (IEC 61508)
MTBF	414,248 Hours
Memory	2 GB DDR3-1066 SDRAM
Communication	Ethernet, Modbus, OPC
Operating Temperature	-40°C to +70°C
Power Supply	24 V DC ±10%
Mounting	DIN Rail / Rack Integrated

Control Logic Execution & Signal Processing

How the IS200ACLEH1A Manages Excitation Control

The IS200ACLEH1A executes application-level control algorithms that regulate generator excitation. It processes field sensor data, performs PID calculations, and outputs control signals to the exciter bridge within a deterministic control loop.

Executes AVR, FCR, PSS, and V/Hz control functions
Processes analog inputs from PT/CT sensors and exciter feedback
Performs 32-bit floating-point arithmetic for precision regulation
Control loop refresh rate ≤5 ms for stable voltage control

Outputs firing pulses and control signals to the exciter bridge
Manages over-excitation, under-excitation, and loss-of-field protection
Coordinates with I/O packs via IONet for distributed signal acquisition
Maintains real-time data exchange with the supervisory network

Redundancy Architecture & System Integration

IS200ACLEH1A Redundancy and Communication

The IS200ACLEH1A supports flexible redundancy configurations to match application criticality. It integrates with the Mark VIe control network through dual Ethernet ports and the IONet I/O network.

Simplex (single-unit operation) for non-critical loops
Duplex (dual-unit backup) with automatic failover
Triple Modular Redundancy (TMR) with 2-out-of-3 voting
Designated controller selection via weighting algorithm

State exchange through IONet keeps redundant controllers synchronized
Dual Ethernet ports support network redundancy
Firmware managed via ToolboxST software suite
Compatible with ControlST V07.02 and higher

FAQ

Our IS200ACLEH1A is not communicating with the I/O packs after a rack power cycle. What should we verify first?

The IS200ACLEH1A relies on the Mark VIe backplane and IONet for I/O communication. Verify that the module is fully seated and the backplane connector is engaged. Check the onboard LED diagnostics for power, run, and fault status. If the module fails to establish an IONet link, confirm that the IONet switch is powered and the Ethernet cabling is secure.

We need to replace a failed IS200ACLEH1A in a TMR system. Can we use a simplex-configured module as a temporary replacement?

No. The IS200ACLEH1A in a TMR configuration requires matched firmware across all three controllers for correct voting and state exchange. A simplex-configured module will not participate in the 2-out-of-3 voting architecture. Use a module with identical firmware revision and redundancy configuration.

The IS200ACLEH1A is reporting a firmware mismatch after we installed a replacement unit. How do we resolve this?

The IS200ACLEH1A must be loaded with firmware compatible with the installed EX2100 system configuration. Use ToolboxST software to verify the firmware revision on the replacement module. If it differs from the system requirement, perform a firmware update via the Ethernet or IONet connection before returning the unit to service.

Our IS200ACLEH1A has been in storage for over a year. What should we check before installing it in a live EX2100 rack?

Inspect the module for physical damage and verify that the conformal coating is intact. Check that the firmware revision matches your system. Before installation, ensure the control rack is de-energized and follow ESD precautions. After power-up, verify communication via the onboard LEDs and confirm the module is recognized by ToolboxST.

Can the IS200ACLEH1A be hot-swapped while the turbine is running?

No. The IS200ACLEH1A manages critical excitation control logic. Removing or installing the module while the EX2100 cabinet is energized can cause loss of excitation control. The control rack must be in a non-critical state or powered down before attempting module replacement.

Moore Automation

Moore Automation supports power generation and heavy industry with a focus on legacy turbine and excitation control components. Our team helps plants maintain GE Mark VIe and EX2100 systems when OEM support windows close and replacement parts become scarce.

With a global sourcing network, we locate discontinued control layer modules and related components, verifying part numbers and firmware compatibility before shipment. Our process is built for the reality of forced outages — fast quotes, clear condition reports, and shipping that meets your maintenance window.

Supported Brands

Emerson GE ICS ABB Triconex
AB
Honeywell Siemens

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