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4V096_Vref_PT 4V096_Vref_PT generation

3V3A_ISO

1

3V3_VDD_ISO

3V3A_ISO

3V3_VDD_ISO

2

24V_ISO

3V3A_ISO

Protection up to 250V AC PT-B

COM NO

Relay driver 24V DC Relay

GPIO-7 PT-C

Signal Conditioning

Linear Optical Isolation Stage

NO

GPIO-1

Relay driver 24V DC Relay

GPIO-8

COM

VCOMM PT_NEUT

CFP

FTM CH1

CFQ

FTM CH2

250V AC, 8A 10-24V DC, 5A

D

Resistive/Inductive Load

MAXQ3180

1.024V VREF output for ext. Burden Module

Oscillator 8MHz

CT Voltage Inputs

NC

3 position per DOUT, 3.5mm pitch WAGO connectors on side plate

DOUT-3

IRQ ISO_AGND

PT-N

NC COM

Vin(typ) = 120V AC

PT_NEUT

NC

Digital Outputs

DOUT-2

D

Relay driver 24V DC Relay

GPIO-6 SPI-2 Interface Master mode

Signal Conditioning

+

4 position, 5.08mm pitch WAGO connectors on side plate

NO

Signal Conditioning

DOUT-1

PT-A

PT Voltage Inputs

VREF Vref

ISO_DGND

CPU Reset 3V3_VDD_ISO

Signal Conditioning

CT-B

Signal Conditioning

MISO

SHIELD ISO_AGND

GPIO-9

ISO_DGND

C

ISO_AGND

5VA_ISO -5VA_ISO

Backspin Voltage Inputs

BS-C

BS-B Protection up to 250VAC

4 position, 5.08mm pitch WAGO connectors on side plate

BS-A

256K Flash 32 KB SRAM 12bit ADC 80 pin LQFP 50MHz core

3V3A_ISO

Signal Conditioning

AD-6

Signal Conditioning

AD-7

Signal Conditioning

AD-8

BS_GND

24V_ISO

CPU Reset

FESO

FESI

Reset Generation Logic

RESET from CPU card

On board BDM interface

RS232 Driver bypass

3V3A_ISO

Frequency Detection

FTM CH3

Rotation Detection

FTM CH4

RS232 Driver

UART Interface

Testpoints For each voltage rail

NON-ISOLATED

3V3A_ISO

B

Digital Inputs 3 position, 3.5mm pitch WAGO connectors on side plate

ISO_AGND

D-IN-1

Overvoltage Protection

D-IN-2

Comparator

GPIO-2 24V_ISO

+

3V3_VDD_ISO

GPIO-3

ISOLATED DC POWER SUPPLY

5VDD_ISO Overvoltage sense

10 to 24V DC sink 250V AC tolerant

From CPU card FESI/FESO

BDM Interface

BS-GND 5VA_ISO -5VA_ISO

SS

ISO_DGND

ISO_AGND

Vin(typ) = 120V AC

GPIO-10

RESET Input

From SPI Master of CPU card

SCK

ISOLATION

Processor Freescale Coldfire V1 MCF51AC256

Vin(avg) = 2.048V DC ISO_AGND

MOSI

SPI-1 Interface Slave mode

Signal Conditioning

CT-B

3V3

64 position PCI-Express card edge contacts based Backplane Interface

5 position, 5.08mm pitch WAGO connectors on side plate

CT-A

D-PWR

B

DGND

-5VDD_ISO

GPIO-4

Undervoltage Protection

24V DC INPUT

C

GPIO-5

3V3

ISO_DGND ISO_DGND

ISO_DGND 3V3A_ISO

INDUCTOR

3V3_VDD_ISO

5VA_ISO

INDUCTOR

5VDD_ISO

-5VA_ISO

INDUCTOR

-5VDD_ISO

EARTH

EEPROM Oscillator 16MHz

EXTAL

I2C Interface SCL/SDA

A

A

3V3_VDD_ISO

Temperature Monitoring GPIO-11 Card Status LED (on side plate)

NEXUS POWER MONITORING CARD Title BLOCK DIAGRAM Size A2

ISO_AGND

ISO_DGND 5

4

3

Date: 2

Document Number DRAFT

Rev 0.6

Monday, November 15, 2010 1

Sheet

2

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9

PM card block diagram  
PM card block diagram  

block diagram

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