Keithley 7709 User Manual Download Page 6 | Manualshive

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Figure 1

Simplified schematic for Model 7709

HI
LO

Input

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Sense

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Matrix

Crosspoint

(1 of 48)

To DMM

Backplane

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HI LO

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HI LO

HI LO

HI LO

Ch 43

Row 6

Column 3

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Summary of Contents for 7709

Page 1: ...Model 7709 User s Guide PA 771 Rev B 8 03 A G R E A T E R M E A S U R E O F C O N F I D E N C E...

Page 2: ...that a shock hazard exists when voltage levels greater than 30V RMS 42 4V peak or 60VDC are present A good safety practice is to expect that hazardous voltage is present in any unknown circuit before...

Page 3: ...electric shock and fire replacement components in mains circuits including the power transformer test leads and input jacks must be purchased from Keithley Instru ments Standard fuses with applicable...

Page 4: ...nsion on page 6 Basic matrix column expansion on page 6 Daisy chaining matrix rows on page 8 Connections and wiring on page 9 D shell connectors on page 10 Wiring on page 11 Row daisy chain connection...

Page 5: ...shock hazard may be present Card configuration schematic Figure 1 shows a simplified diagram of the Model 7709 matrix module The matrix consists of 48 crosspoints Each crosspoint channel is a 2 pole...

Page 6: ...21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 50 49 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Columns HI LO HI LO HI LO HI LO HI LO HI LO Rows 1 2 3 4 5 6 HI LO HI LO Matri...

Page 7: ...nect the DUT to the DMM As shown in Figure 3 closing system channel 3 also closes channels 15 49 and 50 to connect the DUT to the DMM Figure 2 2 wire DUT measurements using Model 27xx DMM Figure 3 4 w...

Page 8: ...of the external source each DUT can be powered separately An example of this is shown in Figure 4 The external source is connected to Row 3 and the power cables for the two DUTs are connected to Colu...

Page 9: ...module system that uses an external source It is similar to the one in Figure 4 except that it allows more DUT to be tested The first matrix module is used to route the external source to the DUT whi...

Page 10: ...nput DUT 8 DUT 7 DUT 6 DUT 5 DUT 4 DUT 1 DUT 2 DUT 3 32 8 7 6 5 4 3 2 1 31 30 29 28 27 26 25 Multiple channel 25 of module 1 closed to power DUT 1 System channel 1 of module 2 closed to connect DUT 1...

Page 11: ...m NOTE Techniques to daisy chain rows are explained in Connections and wiring Figure 7 Daisy chained matrix modules 1 6 1 8 1 8 1 8 9 16 7709 1 7709 2 17 24 7709 3 25 32 7709 4 33 40 7709 5 1 8 1 8 1...

Page 12: ...ame is turned off and disconnected from line power Before making or breaking connections make sure power is removed from all external circuitry Do not connect signals that may exceed the maximum speci...

Page 13: ...Matrix terminal Pin Matrix terminal 1 Row 1 Hi 25 Col 2 Lo 1 Row 1 Hi 2 Row 2 Lo 26 Col 3 Hi 2 Row 2 Hi 3 27 Col 4 Lo 3 Row 3 Hi 4 Row 4 Lo 28 Col 5 Hi 4 5 29 Col 6 Lo 5 Row 4 Hi 6 Row 6 Lo 30 Col 7...

Page 14: ...dule WARNING When using IDC ribbon cable connections DO NOT exceed 42V anywhere in the test system or at the front panel inputs of the Model 27xx For higher voltage applications use larger wire up to...

Page 15: ...inal identification for 50 conductor IDC ribbon cable and 7709 DB 50 connector Ribbon Cable Matrix DB 50 Ribbon Cable Matrix DB 50 Conductor Color Terminal Pin Conductor Color Terminal Pin 1 Brown Row...

Page 16: ...HI Column 8 LO 42 Red 43 Orange 44 Yellow 45 Green 46 Blue 47 Violet 48 Grey 49 White 50 Black 1 Brown HI Row 1 LO 2 Red 3 Orange 4 Yellow HI Row 2 LO HI Row 3 LO 6 Blue 7 Violet 8 Grey 9 White HI Ro...

Page 17: ...V is applied to the front terminals of the DMM all matrix module wiring must be rated for 1000V The connector cover for the 25 pin D shell connector on the Model 7709 must be installed if it is not go...

Page 18: ...the following steps to build a row of daisy chain cable 1 Start with an appropriate length of 25 conductor IDC ribbon cable For the Model 2700 2701 a 3 length of cable is need ed For the Model 2750 a...

Page 19: ...he row of daisy chain ribbon cables connected to the 25 pin D shell connectors of the Model 7709s Matrix terminal identification for the 25 conductor ribbon cable is provided in Table 3 WARNING A conn...

Page 20: ...w 2 Lo 15 17 Violet 5 Green Row 3 Hi 3 18 Grey 6 Blue Row 3 Lo 16 19 White 7 Violet 20 Black 8 Grey 21 Brown 9 White Row 4 Hi 5 22 Red 10 Black Row 4 Lo 18 23 Orange 11 Brown Row 5 Hi 6 24 Yellow 12 R...

Page 21: ...t terminals of the DMM all matrix module wiring must be rated for 1000V Figure 15 Row daisy chaining using solder cup connectors Typical DUT connections The following examples show typical wiring conn...

Page 22: ...ctions Figure 17 4 Wire and RTD connections Column 1 HI LO Column 8 HI LO Columns 2 7 Resistors or Thermistors Column 1 HI LO Column 4 HI LO Columns 2 3 Column 5 HI LO Column 8 HI LO Columns 6 7 Resis...

Page 23: ...20 Figure 18 Voltage connections DC or AC Column 1 HI LO Column 8 HI LO Columns 2 7 DC Voltage AC Voltage...

Page 24: ...Use this to record connection information and channel descrip tions as needed Table 4 Connection log Model 7709 Column Row Color Description Col 1 H L Col 2 H L Col 3 H L Col 4 H L Col 5 H L Col 6 H L...

Page 25: ...ands System channel operation System channel operation is used to connect matrix columns to the Model 27xx DMM With 2 wire function selected system channels 1 through 8 can be closed When one of these...

Page 26: ...message NO AMPS CHAN will be displayed briefly For remote programming error 222 Parameter data out of range is generated Example SYST PRES Restores system preset defaults SENS FUNC CURR DC Selects DC...

Page 27: ...be used to open a channel The ALL option of the OPEN key opens all channels ROUT MULT CLOS clist Close specified channels unlisted channels not affected ROUT MULT OPEN clist Open specified channels un...

Page 28: ...escription Component designation if applicable Keithley part number Factory service If the instrument is to be returned to Keithley Instruments for repair perform the following Call the Repair Departm...

Page 29: ...1K R11 RES 4 99K 1 1 4W METAL FILM 1206 R 391 4 99K R12 R14 RES 49 9 1 1 4W METAL FILM 1206 R 391 49 9 R13 RES 4 99K 1 1 4W METAL FILM 1206 R 391 4 99K R2 RES 10K 1 100MW THICK FILM 0805 R 418 10K R5...

Page 30: ...31 K23 CR24 K32 CR32 K24 K9 K1 CR9 CR2 CR1 CR41 CR42 K10 CR10 K2 CR3 K11 CR11 K3 CR4 K12 CR12 K4 CR5 K13 CR13 K5 CR6 K14 CR14 K6 CR7 K15 CR15 K7 CR8 K16 CR16 K8 C20 C19 M4 M1 J1020 J1025 Primary Side...

Page 31: ...del 7709 component layout Side 01 M3 M6 M2 Secondary Side Components Side 01 For component information see product structure R11 R4 C17 C4 C1 C10 R9 C11 R10 C18 C5 C3 R2 C14 R3 R1 R5 R8 C9 C6 C13 C15...

Page 32: ...CONTACT RESISTANCE 1 any path and additional 1 at end of con tact life CONTACT POTENTIAL 3 V per contact pair OFFSET CURRENT 100pA CONNECTOR TYPE 50 pin female D shell for rows and columns 25 pin fema...

Page 33: ...60 11 77 26 GERMANY Landsberger Strasse 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 GREAT BRITAIN Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 75 00 Fax 0118 929 75 1...

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