Brainboxes Admux AD1200 User Manual Download Page 1

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ADMUX Reference

ADMUX

AD1200 Relay

Multiplexer

Board

1.00 EDITION

MAY 1994

Intro-1

Summary of Contents for Admux AD1200

Page 1: ...ADMUX Reference ADMUX AD1200 Relay Multiplexer Board 1 00 EDITION MAY 1994 Intro 1...

Page 2: ...d Junction 9 Resistors R1 R2 R3 and R4 10 Jumpers W3 and W4 10 Low Pass Filter R15 and C28 11 Gain Setting of Signal Amplifier 11 Pull Up Pull Down Open Circuit Detection 12 AD1200 Register Resume 13...

Page 3: ...tion Compensation 8 Figure 1 9 Gain Selection 12 Figure 1 10 VOPT Selection 13 Figure 1 11 AD1200 Register Map 13 Figure 1 12 A D Control Status Register 14 Figure 1 13 DIGOUT Output Register 15 Figur...

Page 4: ...f low level signals and complete galvanic isolation between the selected input and the AD1200 card in the PC The input to the gain amp and the isolating amp are both via any selected on board relay an...

Page 5: ...exer Terminal Board __________________________________ _ Each Relay Multiplexer board ADMUX has 16 Double Pole Relays switching a differential pair of input lines on to one of the AD1200 input channel...

Page 6: ...n Without ISO122 Amp STACK RELAY 0 RELAY 15 ROD STACK ROD W34 J1 J2 0 1 2 3 4 5 6 7 8 9 A B C D E F CH0 CH1 AD1200 CH2 C C CJC R1 INPUT CH3 A A JUMPERS R2 1234 CHANNEL CH4 B B R3 SELECT CH5 L L R4 CH6...

Page 7: ...ssible The screw terminals can take wire up to 2 5mm 0 1 inch in diameter Each of 50IDC entry is a latching connector The four plastic mounting feet may be removed and the terminal board used as a scr...

Page 8: ...___ BOARD DIP DIP DIP DIP SWITCH Relays Addressed By _____ ___ ___ ___ ___ ______ ___________________ ADDRESS 1 2 3 4 DO7 DO6 DO5 DO4 0 On On On On 00 0F Hex 0 15 Dec Default 1 Off On On On 10 1F Hex...

Page 9: ...nnel 1 ADCH02 Channel 2 ADCH03 Channel 3 ADCH04 Channel 4 ADCH05 Channel 5 ADCH06 Channel 6 ADCH07 Channel 7 Relay Made Feedback Select Jumpers _________________________________ The ADMUX board has br...

Page 10: ...ies cards have an external clock input line EXT CLOCK that can be used to strobe A D conversions when the card is in mode 3 The EXT CLOCK line must be driven by a high to low going edge The ADMUX card...

Page 11: ...n Compensation _____________________________________________ CJC Circuit Unused Relay 0 free for normal use FACTORY DEFAULT CJC Circuit Activated On Relay 0 Using The Cold Junction The cold junction l...

Page 12: ..._ 4096 Gain 0 5mV per C where the 0 5mV per degree C is 0 5 1000 Volts per degree C Thus for the above ADC reading of 3686 decimal with a 10Volt span in the input range and a Gain of 1000 Temp in C 36...

Page 13: ...ut signals fit 250 Ohm precision resistor for 4 20m Amp current to voltage conversion R3 Nominally 100M Ohms This is for thermocouple break detection When this resistor is fitted if the thermocouple b...

Page 14: ...remove C28 and short out R15 R15 and C28 are located between the NMH1215 DC DC converter and the PGA202 amplifier Just to the right of the VOPT jumpers Gain Setting of Signal Amplifier _______________...

Page 15: ..._ _ Open circuit inputs can be detected by the installation of resistors to pull the differential input lines to a known state The two VOPT jumpers can pull the INPUT line via a 100k resistor R13 to i...

Page 16: ...x A D CONTROL STATUS REGISTER ADCSR ADCSR 0001 R W 0219 Hex A D GAIN CONTROL REGISTER ADGCR ADGCR 0002 R W 021A Hex A D DAC0 LOW BYTE DAC0LO ADCLO 0003 R W 021B Hex A D DAC0 HIGH BYTE DAC0HI ADCHI 000...

Page 17: ...Register BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 0218 A D A D A D CLEAR DMA INT MODE MODE Hex DONE ERROR BUSY ERROR ENABLE ENABLE BIT 1 BIT 0 Read Read Read Write R W R W R W R W Bit 7 A D Do...

Page 18: ...h those bits set false force the DIGOUT line low Figure 1 13 DIGOUT Output Register __________________________________ DIGOUT Digital Output Port Register BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT...

Page 19: ...BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 021E DIGIN DIGIN DIGIN DIGIN DIGIN DIGIN DIGIN DIGIN Hex 7 6 5 4 3 2 1 0 Read Read Read Read Read Read Read Read Sample Programs ________________ The sequence for select...

Page 20: ...d 50 60 FOR C 1 TO W NEXT REM Delay To Prevent Us Wasting RELAY s Life 70 NEXT RELAY 80 90 END 99 100 REM FEEDBACK signal goes LOW when new relay made also on H21E 1000 REM wait for feed back 1010 PRI...

Page 21: ...d 17 O O 18 Amp Low 12Volts Out 19 O O 20 12Volts Out Power Ground 21 O O 22 DAC0 Output DAC0 Ground 23 O O 24 DAC1 Output DAC1 Ground 25 O O 26 Digital Ground Digital Gnd 27 O O 28 Dig Input 0 Dig In...

Page 22: ...dress 17 Cables 1 4 5 Channel select 1 2 6 Clear error 14 Cold junction 4 8 9 DAC0 13 18 DAC0 Ground 18 DAC1 13 18 DAC1 Ground 18 Differential 1 2 6 8 10 11 12 DIGIN 15 16 Digital i o 13 17 Digital in...

Page 23: ...plexing 1 Mux 5 16 18 Power 14 18 Programmable gain 11 15 Pseudo differential 11 Register map 13 Screw terminal board 4 Single conversion 15 Single ended 10 Strobe 7 Temperature 8 9 11 Thermocouple 4...