GE Industrial Solutions Galaxy Verification - Manual (Page 95)

Galaxy Power System Verification Procedures
Issue 3 January 2008 Glossary 5 - 3
SC Controller Circuit Boards (Basic)
BJA1 or BJA2
Power Board Provides the power required by the basic controller, and provides the
hardware high voltage (HV) circuitry.
BJA1 is for 48 volt systems; BJA2 is for 24 volt systems.
BJB1 Digital
Board Contains the microprocessor, memory, serial interface, chip select logic,
and other digital components used for the basic controller.
BJC1, BJC2 or
BJC3 Rectifier
Interface Boards BJC1 provides the circuitry to interface with Lineage Power rectifiers
with VI signals, ferroresonant, or switch mode rectifiers (without
rectifier current monitoring).
BJC2 provides the same functions for rectifiers with mV shunt signals:
Lineage Power switch mode and non-Lucent rectifiers. Each board can
control up to eight rectifiers, allowing Galaxy to control a total of 24
rectifiers.
BJC3 (Serial Rectifier Interface Board) provides the circuitry to
interface with Galaxy serial interface switchmode rectifiers and
converters. The BJC3 can control up to 24 serial rectifiers or converters.
BJE1 Relay/Alarm/
Display Driver
Board Contains the remaining circuitry required by the basic controller. Has
isolation circuits to receive contact closures from other parts of the plant
such as external fuse alarms, TR leads, and external timer float and
boost leads. Contains the alarm relays such as power major and power
minor. Also contains the interface circuits to the front panel display
board (BJG1).
BJF1 or BJF2
Termination Fuse
Board Contains the input power terminal blocks and fuses for the controller.
BJF1 is for negative voltage plants; BJF2 is for positive voltage plants.
BJG1 Display
Board Contains the switches, LEDs and eight-line display for the front panel,
providing the primary user interface for the controller. Mounted inside
the front door
BJT1 Termination
Board Contains the terminal blocks for customer alarm wiring and signal
inputs. This board mounts next to the backplane on the back of the
controller.