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Millennium SC_MAN
Rev 2.0
Microprocessor Cards
-
MCR1B and MCR2B
Figure 8 MCR1B/2B Circuit Card
Same cards used in M2 controller
The core MSC is the matched pair of M2 circuit cards mounted on a drawer
-
MCR1B and MCR2B. The
MCR1 is the larger of the two cards and contains all the external input/output interfaces, local and
remote user interface circuitry, measurement circuits, real time clock, wide input range power
converter, and connections for the MCR2B. The MCR2B contains the main microprocessor with of
Flash memory and RAM. It also contains the hardware for the Ethernet control. Factory calibration
values for the analog circuits located on the MCR1B are stored in memory on the MCR2B.
Fuse
Description
Fuse Size
F1
Controller Input Power
3A
F2
Alarm Battery Supply
(ABS)
1.3A
Fuses
Fuse Card
-
MSCB_FB
Figure 9 MSCB_FB Fuse Card
Fuses for
•
Controller cards
•
Parallel rectifier
•
remote sense (reg)
•
Ferro rectifier EQ, HV, and TR
relays
•
SM rectifier CH, EQ, HV, and OTR
circuits
Terminal block connections for
•
Aux Port
-
RS
-
232/RS
-
485
•
Remote Peripheral Module (RPM) bus
•
10k/30k thermistors
•
Controller Power and Ground
•
Plant Voltage and Shunt sense inputs