IS215ACLAH1A - Application Control Layer Module

IS215ACLAH1A - Application Control Layer Module IS215ACLAH1A - Application Control Layer Module

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Part Number: IS215ACLAH1A
Manufacturer: General Electric
Series: EX2100
Product Type: Application Control Layer Module
Technology: Surface Mount
Operating System: QNX Neutrino
Programming: 16-bit signed integer
Power Requirements: +5 V dc
Memory: 256 MB
Common Mode Voltage Range: ±5 V
Dimensions: 11.00 x 9.00 x 3.00
Operating temperature: 0 to 60 °C
Primary Ethernet Interface: 10BaseT/100BaseTX
No.of Analog Voltage Inputs: 6
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEI-100434A


IS215ACLAH1A is an Application Control Layer Module manufactured and designed by General Electric as part of the EX2100 Series used in GE Excitation Control Systems. The IS215ACL_ Application Control Layer Module (ACL) is a microprocessor-based master controller that performs multiple duties over communication networks such as EthernetTM and ISBus. The ACL mounts in a standard Innovation Seriesô drive or EX2100 exciter board rack and occupies two half-slots. The ACL and board rack are located in the control cabinet. In drive applications, the ACLís P1 connector (4-row 128-pin) plugs into the Control Assembly Backplane Board (CABP). In the EX2100 exciter, the ACL mounts in the Exciter Backplane (EBKP). The ACL can be ordered in two different I/O configurations as follows:

  • IS215ACLAH1A Module with one 10BaseT Ethernet port and two serial communication ports (COM1 and COM2), as used in the EX2100.
  • IS215ACLIH1A Module with one 10BaseT Ethernet port, two serial communication ports (COM1 and COM2), and two ISBus ports.


  • (CPU): CPU incorporates 16 K bytes of internal L1 cache. It is a 486-type processor operating at 100 MHz.
  • Peripheral component interconnect (PCI): The PCI controller manages all memory, I/O, and configuration transfers to and from the PCI bus. Memory and I/O transfers are normal reads/writes from the CPU. Configuration reads/writes must be accessed as 32-bit transfers by writing the configuration address to an
  • I/O port and then accessing another I/O port to read/write the configuration register.
  • 128 K byte level 2 cache is controlled by the PCI controller. The L2 cache is preset to produce 152 Ns cache line fills between the L2 cache and the L1 cache.
  • BIOS is a 1 MB (128 KB x 8) 5 V flash memory device and mounts in a socket on the ACL. See Table 4, Basic BIOS Settings, for settings accessible through the toolbox, as well as through the setup utility. The BIOS will redirect the video display to COM1 if a video BIOS is not found (if there is no PC/104 VGA board installed).
  • DRAM consists of 8 MB of 60 Ns EDO nonparity. The PCI controller controls access to the DRAM.
  • The Bus Target interface provides a bridge between the PCI bus and the ACL local bus ISA controller. The interface can select up to four local bus devices, although only three are used in the drives.
  • Dual-Ported RAM (DPRAM) (8k x 8 size) is located on the local bus and identified as Device0. The ACL communicates with the Digital Signal Processor board (DSPX) through the 32-bit P1 bus and the DPRAM. The DSPX board generates the P1 bus cycles. If simultaneous accesses occur on the same address, the ACL may hold the DSPX board in an OFF condition for a maximum of 100 Ns.


Basic Input/Output System (BIOS) identifies and initializes the hardware. During initialization, the BIOS directs all output display information to the COM1 serial port. The BIOS also supports serial loading of the operating system (compatible with the present GE loader) during the initial boot sequence through the COM1 port.

  • Overwrites the boot interrupt to point to GEís extended BIOS
  • Displays the CMOS settings via the COM1 serial port (accessible through the toolbox and setup utility)
  • Accommodates an RS-232C download
  • Initializes any GE-specific hardware
  • Resets the ACL_ through RESDRV when needed through an I/O write
  • Enables flash disk support and booting
  • Overwrites INT 10 with calls to the serial interrupt

WOC has the largest stock of GE Excitation Control System Replacement Parts. We can also supply unused and rebuilt backed-up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly get in touch with our team by phone or email.


What is the Application Control Layer?

The Application Control Layer is a component of a software system that manages and enforces rules and policies related to application behavior and access.

What does the Application Control Layer module do?

This module regulates which applications can run, how they interact, and what resources they can access within a system or network.

Why is the Application Control Layer important?

It enhances security by preventing unauthorized applications from executing or accessing sensitive data, thereby reducing the risk of malware and data breaches.