EX2100 User’s Guide GEH-6632 Chapter 2 Functional Description
2-11
Control Module
The control module is a VME-style rack with boards cable connected to the I/O
terminal boards. This rack is divided into three independently powered sections for
the M1, M2, and C controllers. Each controller consists of control and I/O processor
boards. If the rack contains only the M1 controller then it is a simplex control
system; if the rack contains all three controllers then it is a redundant control system.
The control and I/O processor boards are as follows:
• Microprocessor-based Application Control Layer Module (ACLA) controller,
with LAN Ethernet port
• Microprocessor-based Digital Signal Processor (DSPX) controller
• Exciter ISBus Board (EISB), with fiber-optic communication with the bridge
feedback board
• Exciter Main I/O Board (EMIO), with control of pilot relays and gating
commands to the ESEL board
• Exciter Selector Board (ESEL), with gate pulse distribution from the active
controller to the EGPA.
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