EX2100 User’s Guide GEH-6632 Glossary of Terms
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DCS (Distributed Control System)
Control system, usually applied to control of boilers and other process equipment.
de-excitation
The de-excitation circuit provides a conduction path through a discharge resistor to
dissipate the field current after a unit trip.
device
A configurable component of a control system.
DRAM
Dynamic Random Access Memory, used in microprocessor-based equipment.
EGD
Ethernet Global Data, a control network and protocol for the controller. Devices
share data through EGD exchanges (pages).
EMI
Electro-magnetic interference; this can affect an electronic control system.
EPBP Backplane
Exciter Power Backplane holds power supply modules, ground detect modules, and
connectors for power distribution.
EPDM
Exciter Power Distribution Module distributes 125 V dc to the power supplies.
Ethernet
LAN with a 10/100 M baud collision avoidance/collision detection system used to
link one or more computers together. Basis for TCP/IP and I/O services layers that
conform to the IEEE 802.3 standard.
EX2100 Exciter
GE static exciter; regulates the generator field current to control the generator output
voltage.
fanned input
A termination board input that is connected to all three redundant controllers.