Single Channel Network Power Margin Card User Manual
Contents
1. FLEASTAR H N Single Channel Network Power Margin Card User Manual e a a ome Dro SD DAAA amp e e EG ker rb Sien ASSY 02211351 00 d l nd di MOU ug ea tala Ms Sech Ay TU 2 kd sag OF Eis Hes Doc 98 37821 00 Rev 1 4 07 20 04 10 Product EIER gedeien Zeene 3 1 1 NPM eat Summary ss seed dee de dee Ae Eed SEEE Ea seats nr eee ae 3 1 2 Product Specifications AAA Sine een en in ee aes 4 2 0 Intertace Descrip e EE 6 2 Bla Interfaces neira ne Aer Ee E E ETR eevee NEE E E T de Eeer A EE 6 2 2 Margin Card Connector Pinouts and Jumpers 8 22 L RS 485 Connector EE 8 2 2 2 EED Connector RE 8 2 23 Reset Connector Arrueren AA eaea a aa AA suede e AIKA MAANA YA 8 2 2 4 Power Input Connector JS sorores E E E a E E ETE RER S 8 2 2 5 Margined Power Output Connector JI 9 2 2 0 RS 232 CONNECIOR IS coerce seins ida aggies EES 9 2 2 1 Fixed Power Output Connector JO dead een TEE SES 9 2 2 8 Tri state Control Connector IO 10 229 N twork Address Jumpers BL dese 10 RI OM E 11 Bal Addressing eege eebe ere E SE oak 11 3 2 Command Descriptions euer AA EENS eux 12 3 2 1 DIAG Command UE oriire Sege geif dier eelef eege Ed iere terete enters 12 3 2 2 LED Command OS 2 dude codeceds cs WA iN AEAEE BE NESIE EER EE ENS 12 3 23 Set Voltage Command OX03 zi disscevepevek ecpucetecueabectsvtadesp dees deed E a ie Es 13 3 2 4 Set Slew Rate Command Us 13 3 2 5 Get Status Command 0x052. ccccccccesssscecssseececseccecseaeeecseceececseeeeceesaececseseececseeeeceeaaececsesaeeeeseeeeeneaes 14 3 2 6 Get Profile Data Command Us bima mm im im mmama 14 3 2 7 Soft Reset Command Us 15 3 2 8 Set Com Port Command 0x08 wena manm mw wimananmanan www awwawwwa 15 3 2 9 Start Profile Command OX09 c ce ccccccsccssecsssceessecsseceessecssececsaecsececeseeceseeeeseeceseeessseceseseeseeceeeeeneees 16 4 0 Miscellaneous Hardware Properties cccssssssesssessssseesssseesesseeee 17 AsV MG Ar E 17 ALD SALON Current LO ads sesh essed eessen E deen Eech 17 Doc 98 37821 00 Rev 1 4 07 20 04 1 0 Product Description The Flexstar Single Channel Network Power Margin card NPM P N 02 37351 00 consists of four compact switching DC to DC converters designed to provide two programmable voltage outputs and two fixed voltage outputs The first programmable channel 5V nominal can be programmed from 0 to 7 5V while the second programmable channel 12V nominal can be programmed from 0 to 15V Slew rates can be controlled in 1 millisecond increments for applications requiring moderate rise and fall times The fixed outputs are 5V at 8A and 12V at 1A which is sufficient to power most SBC s single board computers The input voltage can be from 15 to 24VDC Up to 16 NPM cards can be daisy chained together via an on board RS 485 party line network The NPM card has its own Micro controller that handles the communication addressing
3. Range 0 to 5 Amps Resolution 1 22 milliamps Accuracy 1 of full scale NPM Voltage Measurement Read back Range 0 to 7 5V ChO 0 to 15V Chi Resolution 2 mV Cho 4 mV Chi Accuracy 1 5 of full scale Margin Card Power Sampling both margin channels Samples 2048 for each channel Sample Rate 1 to 255 milliseconds in 1 milliseconds increments NPM Physical Dimensions Length 4 5 inches 11 4 cm Width 3 5 inches 8 9 cm Doc 98 37821 00 Rev 1 4 07 20 04 Height 1 75 inches 4 4 cm Airflow Linear Feet Per Minute LFM 100 Notes 1 Test conditions Channel tested with a 1 amp static resistive load Maximum cable length 1 meter 39 inches 20 gauge wire Voltage measured at the load Doc 98 37821 00 Rev 1 4 07 20 04 2 0 Interface Description F Let le em amp RS232 i d pS DIE ey TE Tar ech J son U 1 1 LEDs Te WW Reset SW NPM Connector Map 2 1 Electrical Interface The NPM interface to the computer is via the standard RS 232 serial port A RS 485 converter is supplied on board to be used to daisy chain as many as 16 cards The beginning and end of the RS 485 network cable should be terminated This terminator is supplied on the each NPM with a jumper to allow chaining multiple cards together Each additional NPM card is daisy chain connected to the next with a simple 10 pin ribbon cable Maximum length of the cable should n
4. and internal voltage algorithms and calibration A 4 position jumper header on each card determines the unique network address for each card Each NPM card has provisions for up to 3 LED s which can be turned on off or blinked at a programmable rate Voltage and current measurement is built into the design and can measure peak load currents on both margin channels up to 5 Amperes In addition the NPM card has on board memory for acquiring power samples with programmable sample rates This provides a snapshot mode for capturing power profiles The NPM cards are designed to operate stand alone or be cabled together to provide multiple channels of power with a single RS232 connection to a PC The NPM is a 4 5 W x 3 5D x 1 75 H circuit board that contains all circuitry for the two margined and two fixed channels Additionally a 3 pin header J10 provides an interface to the Flexstar IDE UDMA 100 card in order to control the tri state circuitry on the IDE card Also a 2 pin header labeled RESET is provided to connect the reset button to a SBC so that this switch functions as the master reset switch for all hardware When RESET is asserted this will force the programmable channels to return to zero volts and the LED s to turn off 1 1 NPM Feature Summary Two independently programmable voltage outputs Two fixed voltage outputs for powering a SBC etc RS 485 network allows up to 16 NPM s to be connected to a si
5. 4 07 20 04 Command Descriptions DIAG Commiand Ox01 EE Il Get Profile Data Command Os mwm m mme nmenmiimi mn imem mn e 13 Get Sa AA NA AA UA AA UA dani statimncinGekeas tattoo cotinine 13 LED Command OKOA Il Set Com Port Command 0X08 cn stees dee Howth seactheaeldiecistiee li hub assier Bhi eegen 14 Set Slew Rate Command Ost 12 Set Voltage Command SU esemgesereses IA Aaa 12 Soft Reset Command OO si ai 14 Start Profile Command Ost 15 Connector Pinouts and Jumpers RS 485 Connector RE EE 7 Connectors Pinouts and Jumpers Fixed Power Output Connector IJ 8 LED Connector erea n E KI KA teed ABU ioe vaaues E EER EAEe ie 7 Margined Power Output Connector JI 8 Network Addr ss Jumpers IPI aeren eege 9 Power Input Conn ctord5 AA AA Ka 7 Reset Connector JA E 7 RS 232 Connector EE 8 Tri state Control Connector ILO www isika Aaaa 9 Interface Description geseet AA AA EELER 5 Connector Pinouts and JUMpers 0 AAA 7 Electrical Interfaces AANIKA KUTEKA KHAA EEN cau cveddens cbvindvacseeds 5 Miscellaneous Hardware Properties scscsescssssccssesseesecseesccnecseesecnaesecsaeceesecaeesecnesscesasecesaecaeeseeneeseenaeenss 16 High Current Loads wwa orig WA ebe eto 16 TEM eh EE 16 Product Description EELER 3 4 Feature Summary ii AWEKA KALE EE EN EE EE EEEE EE EENE EE ENEE E EERE EEEE 3 Specifications eneeier Seis EES 4 Software Interfaces sire eis a eee ee era eed 10 el e 10 Command Descriptions diese
6. LEN1 Low byte of length word header data checksum LEN2 High byte of length word DATA data if LEN gt 8 8 is the base header size including checksum SUM checksum of data from ETX to end of DATA Checksum example FD 55 AA 00 11 08 00 00 1B gt Status Byte NOTE 1 The possible status values returned in the upper nibble are ACK 0x10 PROFILE_RDY 0x20 The lower nibble of the status byte will always contain the last sent command byte Most commands will respond immediately The exceptions to this are the SET COM PORT and the SOFT_RESET command which do not respond at all 3 1 Addressing Doc 98 37821 00 Rev 1 4 07 20 04 Each device present on the network will respond to it s own unique address determined by the jumper setting on JP1 In addition all devices will respond to the BROADCAST address OxFF NOTE Broadcast functions will NOT generate a response to the Host since this would result in a network conflict with two or more devices attempting to utilize the network simultaneously 3 2 Command Descriptions 3 2 1 DIAG Command 0x01 The diagnostic command provides a method for establishing communication with an NPM card This commande expected response should be an ACKNOWLEDGE packet indicating successful communications Command Packet FE AA 55 adr 01 00 00 00 00 sum Where adr target address 0 127 sum checksum Expected Response FD 55 AA adr 110800 sum gt Status Byte
7. When the command is received the NPM will then begin sampling at the desired sample rate until the sample buffer is full The sample buffer holds a maximum of 2048 samples for each channel If a one millisecond sample rate is commanded the buffer will be full about 2 seconds after the command is received 2048 x 1 ms Use the GET PROFILE DATA command to retrieve the data After this command is received the NPM will issue an ACKNOWLEDGE response and then begin sampling When the command is finished the STATUS byte returned from the GET STATUS command will contain a flag bit 5 that indicates the profile buffer has been loaded and may be retrieved using the GET PROFILE DATA command Ifa GET STATUS command is received during sampling the command is ignored If any other command is received during sampling sampling is aborted and that command is executed This allows sampling to be aborted at any time Note that the upper four bits of the samples word LH LL are used as control options See note below Command Packet FE AA 55 adr 09 SL SH LL LH sum Where adr target address 0 127 SL low byte of the sample rate in milliseconds SH _ high byte of the sample rate in milliseconds LL number of samples low byte LH number of samples high byte Max samples 2048 sum checksum Expected Response FD 55 AA adr 19 08 00 sum Where adr target address 0 127 sum checksum Note The upper four bits of th
8. 3 2 2 LED Command 0x02 The LED command provides the method for controlling the ON OFF and BLINK state of the three LED s The default blink rate is fixed at 250 millisecond ON OFF time The blink rate can be changed using a non zero value in BR Each increment of BR is equal to a 25 ms ON OFF time In addition two mode bits are present to allow the YELLOW LED to operate in different modes see table below All LED s are set OFF after power on or reset Command Packet FE AA 55 adr 02 led BR 00 00 sum Where adr target address 0 127 led bit0 RED LED ON bit 1 GREEN LED ON bit 2 YELLOW LED ON bit 3 YELLOW LED Mode bit 0 see below bit 4 Blink RED LED bit 5 Blink GREEN LED bit 6 Blink YELLOW LED bit 7 YELLOW LED Mode bit 1 see below BR Blink rate in 25 ms increments Value of zero uses the default 250 ms sum checksum Expected Response FD 55 AA adr 1208 00 sum Yellow LED Usage Mode bit 0 Mode bit 1 Normal Same as Red amp Green Led s ES External Signal Indicator 0 ON 1 OFF ES KSE Doc 98 37821 00 Rev 1 4 07 20 04 Power On Indicator ON when 5V gt 0 0 li O OSY 3 2 3 Set Voltage Command 0x03 The set voltage command will set the output voltage for both channels using the SLEW RATE set by the SET SLEW RATE command Values for each channel are in millivolts Example 5 25 V 5250 millivolts Default after power up is ZERO volts for both channels Note that t
9. FD 55 AA adr 1408 00 sum Doc 98 37821 00 Rev 1 4 07 20 04 3 2 5 Get Status Command 0x05 The GET_STATUS command provides a method for the Host PC to acquire feedback from the NPM The feedback provides voltage and current for each channel temperature and a firmware version number Command Packet FE AA 55 adr 05 00 00 00 00 sum Where adr target address 0 127 sum checksum Expected Response FD 55 AA adr 15 SL SH V5L V5H I5L I5H V12L V12H 112L 112H TPL TPH VER sum Where adr target address 0 127 SL Status Low Byte see Status Byte below SH Status High Byte V5L low byte of the 5 volt channel voltage in MV NOTE 2 V5H high byte of the 5 volt channel voltage I5L low byte of the 5 volt channel current in MA I5H high byte of the 5 volt channel current V12L low byte of the 12 volt channel voltage in MV V12H high byte of the 12 volt channel voltage 112L low byte of the 12 volt channel current in MA 112H high byte of the 12 volt channel current TPL Temperature low byte in 0 1 deg incrs TPH Temperature high byte MSB set if negative temp VER Hex based version number example 0x10 version 1 0 sum checksum Status Byte 7 6 5 4 3 2 1 0 Gen Profile Ready GE External Input Active NOTE 2 The values received are RAW A D values The values should be multiplied by 1 222 to obtain the correct value 1 222 is the ratio between the 12 bit ADC resolutio
10. aie ee A el reed tos 11 Doc 98 37821 00 Rev 1 4 07 20 04
11. d the SBC reset connector Note that the polarity of the J4 connector must match the polarity of the reset input on the SBC If incorrect the SBC will remain reset indefinitely Pin Description N O pushbutton switch contact with a 20K pull up to 5V 2 2 4 Power Input Connector J5 Doc 98 37821 00 Rev 1 4 07 20 04 J5 is a 4 pin 0 156 spacing Molex type connector and is the main DC power input connector for the NPM 2 2 5 Margined Power Output Connector J7 J7 is a 10 pin boxed male header connector and is the output connector for both programmable voltage channels Description 10 2 2 6 RS 232 Connector J8 J8 is a 10 pin male header that provides the main RS 232 control input to the NPM card 2 2 7 Fixed Power Output Connector J9 J9 is a 10 pin boxed male header connector and is the output connector for both fixed voltage channels Pin Description 12V LL SAN S y O Doc 98 37821 00 Rev 1 4 07 20 04 3 4 GROUND 2 2 8 Tri state Control Connector J10 J10 is a three pin SIP header connector that is intended to provide a low high signal to an external HBA card containing tri stating circuitry The middle pin of this connector is connected to the programmable 5V channel such that when 5V is applied to the external device the tri state circuit is on LOWZ state When the 5V channel is at zero volts the tri state circuit will be off HIGHZ state Description GROUND 5V programmable output chan
12. e samples word high nibble of LH are used as control options as follows Bit 7 Enable power prior to sampling This requires a SET VOLTAGE command to be sent prior to this command with bit 7 of the samples word set 1 see SET VOLTAGE command Bit 6 5 4 Reserved Doc 98 37821 00 Rev 1 4 07 20 04 4 0 Miscellaneous Hardware Properties Please take note of the properties of this design to utilize the product correctly 4 1 Linearity The output voltage is not linear over the entire programming range The following table shows the results of various set points versus actual output 5V Channel Set point Actual gt 1 6V Linear Range 1 5V 1 4V lt 1 4V Approx OV 12V Channel Set Point Actual gt 3 2V Linear Range 3V 2 8V lt 2 8V Approx ON Typical Linear Region of 5V Channel 8 000 7 000 6 000 5 000 Expected Voltage Settings Volts 4 2 High Current Loads Under high current loads the NPM will require some amount of airflow to prevent overheating of the regulator FET s The following table shows approximate airflow versus output power Total Output Watts Air Volume 0 to 20 0 Doc 98 37821 00 Rev 1 4 07 20 04 20 to 50 35 cfm 50 to 100 100 cfm Doc 98 37821 00 Rev 1
13. he upper two bits of the 5V value are used as control options see note below Command Packet FE AA 55 adr 03 5L 5H 12L 12H sum Where adr target address 0 127 5L low byte of the 5 volt value in millivolts 5H high byte of the 5 volt value in millivolts 12L low byte of the 12 volt value in millivolts 12H high byte of the 12 volt value in millivolts sum checksum Expected Response FD 55 AA adr 13 08 00 sum Note The upper two bits of the 5H byte are used as power control options as follows Bit 7 If 1 sets the voltage values but does not cause the voltage to change This is used to set voltage prior to using the START PROFILE command with the option to start power synchronous with sampling Bit 6 Reserved 3 2 4 Set Slew Rate Command 0x04 Using this command controls the slew rate for each channel The default slew rate is 10 milliseconds Each channel can be programmed from 0 to 255 milliseconds Micro stepping the voltage from the current set point to the new set point creates a slew Note that even though slew rate arguments accept a 16 bit value only the low 8 bits are considered Command Packet FE AA 55 adr 04 1L 1H 2L 2H sum Where adr target address 0 127 1L low byte of the 5 volt channel slew rate 1H high byte of the 5 volt channel slew rate 2L low byte of the 12 volt channel slew rate 2H hob byte of the 12 volt channel slew rate sum checksum Expected Response
14. is provided to effectively perform the same operation as a power on or hard reset Both channels will be forced to zero volts and the circuitry will be re calibrated This command will not produce a response to the Host PC Command Packet FE AA 55 adr 07 00 00 00 00 sum Where adr target address 0 127 sum checksum Expected Response NONE 3 2 8 Set Com Port Command 0x08 This command sets the baud rate for the NPM s serial port The NPM will initially connect at 19 2K baud but other baud rates up to 115 2K may be selected depending on the environment and the length of the RS 485 cable No response will be generated by this command Verification of communication at the new baud rate can be done using the DIAG or GET STATUS commands Default setting on power up or reset are Baud rate 19 2K baud see also NOTE 4 Parity None Stop bits 1 Command Packet FE AA 55 adr 08 BR 00 00 00 sum Where adr target address 0 127 BR Baud rate code NOTE 4 sum checksum Expected Response NONE NOTE 4 The baud rate codes are as follows 1 115 2 K Baud 2 57 6 K Baud Doc 98 37821 00 Rev 1 4 07 20 04 KE 38 4 K Baud 4 19 2 K Baud 5 9600 Baud Selecting the highest baud rate possible will dramatically improve system performance when using the GET PROFILE command 3 2 9 Start Profile Command 0x09 The START PROFILE command is used to initiate a sampling of the power consumption on both power channels
15. n 4096 and the 5 volt reference voltage 3 2 6 Get Profile Data Command 0x06 The GET PROFILE DATA command is used to upload the sampled data from the NPM buffer see also START PROFILE command When the command is received the NPM will begin sending the number of samples specified to the Host This operation takes a maximum of 850 milliseconds at 115 2K baud Note also that the command accepts an offset value The offset is NOT the actual buffer offset but rather a sample offset For example to upload 200 samples starting at sample 1000 LL LH would be 200 and OL OH would be 1000 This feature can be used to break large sample uploads into smaller packets or can be used to zoom into smaller segments of the buffer Command Packet FE AA 55 adr 06 LL LH OL OH sum Where adr target address 0 127 LL number of samples to return low byte Doc 98 37821 00 Rev 1 4 07 20 04 LH number of samples to return high byte Max 2048 OL offset low byte OH _ offset high byte sum checksum Expected Response FD 55 AA adr 36 08 20 DATA sum Where adr target address 0 127 DATA Number of bytes samples x 4 NOTE 3 sum checksum NOTE 3 Data is organized as follows Byte 0 low byte of 5V current Byte 1 high byte of 5V current Byte 2 low byte of 12V current Byte 3 high byte of 12V current repeated n times See also NOTE 2 3 2 7 Soft Reset Command 0x07 A soft reset
16. nel 1 LOWZ 0 HIGHZ GROUND 2 2 9 Network Address Jumpers JP1 JP1 is a 8 pin header used to provide jumpering options for the network address The jumpers are numbered 0 to 3 and can be arranged as follows JPO JP1 JP2 P3 Address 0 default L Out Out Out Out Out Out Out Out Doc 98 37821 00 Rev 1 4 07 20 04 3 0 Software Interface Communication is accomplished from a Serial Com port of the PC to an NPM by sending a simple serial command packet The command packet contains a unique identifier along with an address command command arguments and a checksum The checksum is a simple one byte value which is produced by adding all bytes in the packet and masking the byte remainder of the summation A command packet is as follows STX AAh 55h ADR CMD ARG1 ARG2 ARG3 ARG4 SUM Where STX Start of text char FEh AAh unique msg ID constant 55h unique msg ID constant ADR target address 0 127 CMD command byte ARG1 1st arg byte ARG2 2nd arg byte ARG3 3rd arg byte ARG4 4th arg byte SUM checksum of data from STX thru ARG4 Checksum example FE AA 55 00 01 00 00 00 02 The NPM will respond with a packet similar to the command packet ETX 55h AAh ADR STAT LEN1 LEN2 DATA SUM Where ETX End of text char FDh 55h unique msg ID constant AAh unique msg ID constant ADR address of the target STAT low nibble last command high nibble status NOTE 1
17. ngle PC Simple serial interface protocol Built in Micro Controller provides communications and low level control High accuracy and resolution Voltage and current measurement capability On board memory for power sampling data acquisition Built in RS 232 to RS 485 converter Broadcast mode for parallel device operation VVVVVVVVVV Doc 98 37821 00 Rev 1 4 07 20 04 1 2 Product Specifications See also section 4 0 for more details on specifications General Input Voltage Range 15V to 24V DC Max Input Current 6 7 Amps input 15V output 100W Regulator efficiency Approximately 94 NPM Voltage Channel 1 Range 0 volts to 7 5 volts in 2 4 millivolt increments See also section 4 1 Accuracy Typical 0 5 typical Note 1 Accuracy Maximum 1 of set voltage Note 1 Peak Power 6 Amps for 10 seconds Max Current 3 5 Amps continuous See also section 4 2 NPM Voltage Channel 2 Range 0 volts to 15 volts in 5 8 millivolt increments See also section 4 1 Accuracy Typical 0 5 typical Note 1 Accuracy Maximum 1 of set voltage Note 1 Peak Power 6 Amps for 10 seconds Max Current 3 5 Amps continuous See also section 4 2 Fixed Voltage Power Outputs 5V Max Current 8 Amps continuous See also section 4 2 5V Peak Power 10 Amps for 5 seconds 12V Channel 1 Amp continuous 12V Peak Power 1 5 Amps for 10 seconds NPM Current Measurement both margin channels
18. ot exceed 25 meters baud rate dependant The RTS bit of the RS 232 I O is used to control the direction of the RS 485 drivers When transmitting to an NPM card the RTS bit should be asserted When receiving RTS should be de asserted Be aware also that since the RS 232 receivers are enabled during transmit the data sent to the NPM card is also echoed back to the PC In other words for each message sent to the NPM two messages will return an echo of the first message followed by the actual response message of the NPM Doc 98 37821 00 Rev 1 4 07 20 04 RS 232 J8 a JI RS 485 Differential network JI JI Connecting the RS 485 Network Note in the figure above that the RS 485 terminator jumper should always be installed on the first and last cards in the daisy chain All other cards in the daisy chain should have the terminator jumper removed For a single card installation the terminator jumper should be installed Doc 98 37821 00 Rev 1 4 07 20 04 2 2 Margin Card Connector Pinouts and Jumpers 2 2 1 RS 485 Connector J1 J1 is a 10 pin male header connector designed to connect to a 10 pin female ribbon cable connector Pin Description 6e GROUNDS s GROUNDS o fers 2 2 2 LED Connector J2 Description 10 7 2 2 3 Reset Connector J4 The J4 connector is a two pin header connector which provides an external reset for an attached SBC or other device A 2 pin cable is normally attached between J4 an
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