IS215ACLEH1B (H1BCB): ACLE Module, New Surplus

This IS215ACLEH1B ships as new-surplus stock at the H1BCB revision — a fully built ACLE Application Control Layer module for GE EX2100 excitation control, supplied without its original box. The ACLE is the master controller of the exciter and voltage regulator, running its block-ware application under QNX on the IS200/IS215 hardware platform that GE Speedtronic Mark VI systems also use.

Function and Placement in EX2100

In the exciter the ACLE loads and validates the application, runs the regulator logic, evaluates run and start permissives, allows Boolean and I/O forcing during commissioning, and generates application-level alarms. It occupies two slots in the EX2100 racks — IS200ESBP simplex thyristor, IS200EBKP warm-backup thyristor, IS200ERBP simplex regulator, or IS200ERRB redundant regulator backplanes — and shares data with the IS200DSPXH1 DSPX board over dual-port RAM across the backplane, with the DSPX driving the thyristor gates.

Three Revisions, One Rule: Match Your Board

The long suffix on this unit is worth understanding. Reading H1BCB from the front: IS215 is the special-assembly prefix, ACLE the module type, and H1B the hardware variant; the trailing "CB" captures the revision history of that variant. Published teardown data for an H1BCB build describes three revisions — two functional and one artwork — with the first two functional revisions backward compatible. The practical takeaway is simple: later ACLE revisions are generally intended to serve the same role, but the only way to be certain of a drop-in match is to compare against the full suffix printed on the board you are removing. Our GE Speedtronic Part Number Decoder lays out each field.

Inside the Sealed Assembly

The ACLE is two boards in one non-separable unit: an IS200ACLE carrier board and a plug-in PC/104-Plus processor board, with configuration held in non-volatile compact flash. GE's guidance is to service it as a complete module rather than opening it to swap sub-boards, which avoids the software and compatibility issues that arise from mixing revisions. Note that processor-board content has varied across ACLE builds, another reason to match the exact part number.

Before You Condemn the ACLE

New-surplus stock is worth holding, but confirm the ACLE is genuinely the fault before installing one. The tell-tale controller-down symptom is often something else:

• A configuration mismatch or an incomplete runtime download — the board validates its configuration against the hardware at power-up and will hold offline if they disagree.
• A corrupted compact-flash image rather than a hardware failure.
• A fault on the IS200DSPXH1 DSPX or in the firing circuits, surfacing as an ACLE alarm.
• A marginal EX2100 supply rail or a card seating problem on the backplane.
• A dropped toolbox or COM link (verify the 336A3582P1 cable path).

Cross-Reference and Related Parts

Commonly sourced with the ACLE are the IS200DSPXH1 DSPX and the EX2100 backplanes above; the ACLE supersedes the earlier ACLA module. See related hardware in the GE Mark VI IS200 Boards and GE Speedtronic Turbine Control Boards collections.

Request Your IS215ACLEH1B Quote

Include the full part number and suffix (IS215ACLEH1B / H1BCB), the revision, a photo of the label, your EX2100 or EX2100e system and the machine it serves, the ControlST or toolbox version if known, quantity, and urgency. The GE manual reference is GEI-100584. We reply within 24 hours, ship worldwide DDP, and welcome purchase orders.