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Model 7701 - Test Equipment Depot

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2. 11 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Typical connections The following examples show typical wiring connections for the following types of measurements e Q2 Wire and thermistor connections Figure 9 O4 Wire and RTD connections Figure 10 Voltage connections AC or DC Figure 11 Figure 9 O2 Wire and thermistor connections HI Column 1 LO e Resistors or i Columns231 e Thermistors HI Column 32 E Lo o Figure 10 Q4 Wire and RTD connections Resistor or On 4 Wire RTD LO Columns 2 15 HI Resistor or Column de 4 Wire RTD LO HI Column 17 LO Columns 18 31 e e e HI Column 32 12 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 11 Voltage connections DC or AC DC Voltage AC Voltage re RO lt HI Column 1 LO Columns 2 31 lt i lt HI Column 32 LO DT TRE NF Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 13 Connection log Make a copy of Table 4 and affix 1t to the cover of the Model 7701 Use this to record connection information and channel descriptions as needed Table 4 Connection log Model 7701 Chan
3. LO terminals of Multiplexer 2 17 through 32 to DMM Sense LO DMM SLO LO terminals of Multiplexer 1 MUX 2 LO 1 through 16 to DMM Input LO MUX 1 LO Jumper DMM LO 1 of 4 50 Pin D Shell Connector Female 25 Pin D Shell Connector Female eer rT rT o 0000000000000000 18 0 G gt 2099000000000 Eee v 34 14 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Table 1 D shell pin identification 50 pin D shell DB 50 7701 7701 7701 7701 7701 Pin Terminal Pin Terminal Pin Terminal Pin Terminal Pin Terminal 1 Ch 1 Hi 11 Ch 16 Hi 21 Ch 6 Lo 31 Ch 21 Lo 41 Ch 12 Hi 2 Ch 2 Lo 12 Ch 17 Lo 22 Ch 8 Hi 32 Ch 23 Hi 42 Ch 13 Lo 3 Ch 4 Hi 13 Ch 19 Hi 23 Ch 9 Lo 33 Ch 24 Lo 43 Ch 15 Hi 4 Ch 5 Lo 14 Ch 20 Lo 24 Ch 11 Hi 34 Ch 1 Lo 44 Ch 16 Lo 5 Ch 7 Hi 15 Ch 22 Hi 25 Ch 12 Lo 35 Ch 3 Hi 45 Ch 18 Hi 6 Ch 8 Lo 16 Ch 23 Lo 26 Ch 14 Hi 36 Ch 4 Lo 46 Ch 19 Lo 7 Ch 10 Hi 17 Mux 1 Hi 27 Ch 15 Lo 37 Ch 6 Hi 47 Ch 21 Hi 8 Ch 11 Lo 18 Ch 2 Hi 28 Ch 17 Hi 38 Ch 7 Lo 48 Ch 22 Lo 9 Ch 13 Hi 19 Ch 3 Lo 29 Ch 18 Lo 39 Ch 9 Hi 49 Ch 24 Hi 10 Ch 14 Lo 20 Ch 5 Hi 30 Ch 20 Hi 40 Ch 10 Lo 50 Mux 1 Lo 25 pin D shell DB 25 7701 7701 7701 7701 Pin Terminal Pin Terminal Pin Terminal Pin Terminal 1 Ch 25 Hi 7 Ch 31 Hi 14 Ch 25 Lo 20 Ch 31 Lo 2 Ch 26 Hi 8
4. Bg channel 1 closed to perform 4 wire CSID ohms measurement on DUTI Signal path to measure DUT1 Note Installation of the four screw terminal jumpers A through D is shown in Figure 13 17 Test Eguipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEguipmentDepot com With the 4 wire common side ohms mode selected channels 33 and 35 are automatically controlled as follows when a system input channel 1 through 32 is closed Channel 33 is forced open to connect Multiplexer 1 channels 1 through 16 to Multiplexer 2 channels 17 through 32 Channel 35 is forced closed to connect an input channel 1 through 32 to the DMM Input Closing input channel 1 also closes channel 35 to connect DUTI to the DMM input All other input channels will open see Figure 12 Closing channel 2 also closes channel 35 to connect DUT2 to the DMM Again all other channels will open The other 30 input channels are controlled in a similar manner Closing an input channel also closes channel 35 to connect the DUT to the DMM All other channels will open Selecting 4 wire ohms mode There are two 4 wire ohms modes NORM normal and CSID common side For this application use the following procedure to select the CSID mode The 4 wire ohms mode can be selected using the following key press sequence 1 Press SHIFT and then press CARD 2 Select CONFIG 3 Select slot that has the 7701 i e SLOT1 7701 4 Select 4
5. 1 32 150V see Note Channels Screw DC or 150Vrms 212V peak for AC waveforms 1A switched 60W HI Terminals A d 07 O0 o 69 amp 125VA maximum i Backplane DM Sense SAFETY Conforms to European Union Directive 73 23 EEC EN61010 1 8 10 CAT I CONTACT LIFE typ gt 105 operations at max signal level gt 10 operations cold switching The Model 7701 is rated for low voltage applications Ch 132 i i i CONTACT RESISTANCE 10 any path and additional 19 at end of con m When commenting the MIO the intera DMM vii e screw terminals all other modules in the tact life mainframe must be derated to 150VDC or 150Vrms CONTACT POTENTIAL lt 6uV per contact pair H GYM peak dorAC waveform Multiplexer 2 OFFSET CURRENT lt 100pA CONNECTOR TYPE 50 pin female D shell Channels 1 24 Channels 33 35 in this schematic refer to the designations 25 pin female D shell Channels 25 32 used for control and not actual available channels Supplied with male IDC ribbon cable connectors For more information refer to the ROUTE MULT command ISOLATION BETWEEN ANY TWO TERMINALS gt 10 Q lt 200pE section in the Model 2700 or 2750 User s Manual ISOLATION BETWEEN ANY TERMINAL AND EARTH gt 10 Q lt 400pE CROSS TALK 1MHz 500 Load lt 35dB INSERTION LOSS 500 Source 500 Load lt 0 35dB below 1MHz lt 3dB below 2MHz COMMON MODE VOLTAGE 300VDC or 300Vrms 425V peak for AC waveforms between any t
6. but you must use multiple channel operation to close channels Example NOTE In order to use the front panel inputs make sure the INPUT switch is in the out F position SYST PRES Restores system preset defaults ROUT MULT CLOS 0101 Closes channel 101 SENS FUNC CURR DC Selects DCI function Legal operation Multiple channel operation WARNING Multiple channel operation should only be performed by experienced test engineers who recognize the dangers associated with multiple channel closures Multiple channel operation provides independent control of switching module channels 1 through 35 When you close or open a multiple channel only the specified channel or channels will close or open Other closed or open channels are not affected Multiple channel operation for the Model 7701 is summarized as follows For earlier versions of the Model 2700 multiple channel operation is not available from the front panel remote operation only For the Model 2701 2750 and later versions of the Model 2700 the MULTI option of the CLOSE key can be used to close a channel For the Model 2701 2750 and later versions of the Model 2700 the MULTI option of the OPEN key can be used to open a channel The ALL option of the OPEN key opens all channels ROUT MULT CLOS lt clist gt Close specified channels unlisted channels not affected ROUT MULT OPEN lt clist gt Open specified channels unlisted channels not affected ROUT
7. 4 wire ohms measurements on up to 32 DUT Details of CSID operation is provided in the application for Common side 4 wire ohms measurements on page 17 Test Eguipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEguipmentDepot com Amps measurements The 7701 module does not support amps measurements System channel operation cannot be used to close channels while an amps function DCI or ICD is selected If an amps function DCI or ACI is selected and you attempt to close a system channel the 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 DCI function ROUT CLOS 9101 Attempts to close system channel 101 Generates error 222 If a system channel is already closed and you attempt to select the DCI or ACI function the message INVALID FUNC will be displayed briefly For remote programming error 221 Settings conflict is generated Example SYST PRES Restores system preset defaults ROUT CLOS 9101 Close system channel 101 SENS FUNC CURR DC Attempts to select DCI function Generates error 221 Making amps measurements In order to perform amps measurements you must use the front panel inputs of the 27xx mainframe You can still use the 7701 module for other aspects of the test such as controlling a bias supply for DUT
8. 7 Lo 38 39 White Ch 20 Hi 30 15 Green Ch 8 Hi 22 40 Black Ch 20 Lo 14 16 Blue Ch 8 Lo 6 41 Brown Ch21 Hi 47 17 Violet Ch 9 Hi 39 42 Red Ch 21 Lo 31 18 Grey Ch 9 Lo 23 43 Orange Ch 22 Hi 15 19 White Ch 10 Hi 7 44 Yellow Ch 22 Lo 48 20 Black Ch 10 Lo 40 45 Green Ch 23 Hi 32 21 Brown Ch 11 Hi 24 46 Blue Ch 23 Lo 16 22 Red Ch 11 Lo 8 47 Violet Ch 24 Hi 49 23 Orange Ch12 Hi 41 48 Grey Ch 24 Lo 33 24 Yellow Ch 12 Lo 25 49 White Mux I Hi 17 25 Green Ch 13 Hi 9 50 Black Mux 1 Lo 50 50 conductor IDC ribbon cable is available from Keithley Part 15020 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 5 50 conductor ribbon cable terminal identification 50 Pin D Shell Male IDC IDC Ribbon Cable 50 Conductor 1 AE Pa a Ch 1 idus 4 Yellow de Ch 2 5 MAE de Ch 3 7 A a Ch 4 9 M ER a Ch 5 11 UMEN a Ch6 13 ia gt a Ch7 15 a Ch 8 17 MT a Cho AU 20 Black te Ch 10 21 eS Ch 11 23 E io Ch 12 25 e Blue a Ch13 27 HU NU nr Ch 14 dali 30 Black de Ch 15 31 MMS MIT EN Ch 16 33 Br a Ch17 35 se e Ch 18 37 ke EN a Ch 19 sia 40 Black ie Ch 20 41 MM EE i Ch 21 da 44 Yellow io Ch 22 2 xd 46 Blu Ch 23 47 VE STE dl Ch 24 i ME ER E Multiplexer 1 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Table 3 Term
9. Backplane Sense HI Q DUT33 H i DUT48 o o Sense LO i o DUT49 Ky NE e d a HCl y E bd To other DUT64 U O 2750 slots Common Side Bus Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 21 Biasing and measuring DUT dual multiplexing WARNING _ Multiple channel operation is required for the following application Multiple channel operation should only be performed by experienced test engineers who recognize the dangers associated with multiple channel closures This application demonstrates how to use the Model 7701 as a dual multiplexer to bias and measure 16 DUT An external source powers DUT while the DMM of the Model 27xx measures the output of the DUT To prevent overloading of the exter nal source each DUT is powered and measured separately Figure 15 shows the connections for this application The external source is connected to the Multiplexer 2 terminals of the switching module and DUT is connected to channels 1 through 16 Channels 17 through 32 are used to connect external power to each DUT For this application channels 33 34 and 35 are to be controlled as follows Closing channel 33 isolates the input measurement channels 1 through 16 Multiplexer 1 from the external source channels 11 through 20 Multiplexer 2 It also connects the DUT to the external source This channel must remain closed while testing DUT Ope
10. CR45 CR48 CR54 DIODE DUAL SWITCHING BAV99L RF 82 SOT 23 CR43 CR44 CR46 CR47 DIODE SWITCHING MMBD914 RF 83 SOT 23 CR101 CR102 CR103 CR104 DUAL HIGH SPEED DIODE RF 147 J1015 CONN RT ANGLE DUAL ROW RECEPT CS 1065 1 J1020 CONN FEMALE 25 PINS CS 484 J1025 CONN RT ANGLE 50 PINS CS 1061 1 K1 K32 K41 SINGLE COIL LATCH RELAY RL 225 K42 K43 NON LATCHING RELAY RL 242 Q1 Q4 Q26 Q34 Q36 Q38 Q40 Q42 TRANS NPN SILICON TG 389 Q44 Q46 Q5 N CHANNEL P CHANNEL POWER TG 360 MOSFET Q6 Q7 Q25 Q27 Q29 Q31 Q33 TRANS PNP SILICON TG 388 Q35 Q37 Q39 Q41 Q43 Q45 Q47 TRANS PNP SILICON TG 388 Q48 TRANS NPN SILICON TG 389 R1 RES 69 8K 1 1W THICK FILM R 418 69 8K R2 R3 R5 R6 R108 R109 R110 RES 1K 1 100MW THICK FILM R 418 1K R112 0805 R4 RES 10K 1 100MW THICK FILM R 418 10K 0805 R7 R8 R9 R10 RES ARRAY 4X4 3K 5 125W TF 276 4 3K R11 R15 R16 R17 R18 R19 RES 2 21K 1 1 4W METAL FILM R 391 2 21K 1206 R12 R13 RES ARRAY 4X1K 5 125W TF 276 1K R14 R55 RES 49 9 1 1 4W METAL FILM R 391 49 9 1206 R20 RES 4 75K 1 100MW THICK FILM R 418 4 75K 0805 TE1 TE2 TE3 CONN 4 PIN JOLO BB 125 04 TE 115 4 U1 U2 U3 U6 IC 8 STAGE SHIFT STORE MC14094BD 1C 772 SOIC Ul4 IC RETRIG MULTIVIB 74HC123AM IC 788 SOIC U16 IC 2 5V CASCADABLE SERIAL LSI 212 EEPROM U24 IC OUAD 2 IN AND 74HCTOS SOIC 1C 837 U25 IC HEX SCHMITT INVERT TRIGGER IC 1397 25 D SHELL MALE 77
11. MULT CLOS Returns list of all closed channels ROUT MULT CLOS STAT clist Query closed channels in list 1 closed You can also use the following command to open all channels ROUT OPEN ALL Open all channels Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Applications Common side 4 wire ohms measurements When using 4 wire ohms measurements and system channel operation up to 16 DUT can be tested by the DMM By using common side CSID 4 wire ohms mode and the user configurable screw terminals up to 32 DUT can be measured using 4 wire ohms Such a test system is shown in Figure 12 As shown in Figure 12 all 32 DUT are connected to a common metal bus The bus is connected directly to Input HI and Sense HI of the DMM via the user configurable screw terminals The 32 measurement channels can then be used to connect the other side of each DUT to Input LO and Sense LO of the DMM Jumper installation for this test system is shown in Figure 13 Figure 12 Common side 4 wire test system common side 4 wire ohms mode Plz P13 lt Jumper A amp HI Input 5 O O O o amp amp oLO O umper D Ch 33 i DMM Open b 6 i E HI DUT17 O o 0 O1 0 69 eo HI Ch 17 ch 34 Sense O O O O o _ amp 2 i OLO e LO e MEME Ch 18 31 HI M DUT32 O o o Equivalent Circuit Ch 32 ES 0 o Common Side LO Bus
12. P12 24 Yellow P25 25 Green P13 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 7 Connecting ribbon cable assembly KEITHLEY Q chii COVER A SC Warning When using ribbon cable gt D DO NOT exceed 42 volts Install plastic cover anywhere in the test system Ve unused connector or at the front panel inputs using Wo ENE of the Model 27xx Solder cup cable connections Make all connections to D shell male solder cup connectors using the correct wire size up to 20 AWG Terminal identification for the 50 pin D shell connector is provided in Table 1 and Table 2 Terminal identification for the 25 pin D shell connector is provided in Table 1 and Table 3 Make sure to add supplementary insulation around the harness for voltages above 42V peak Figure 8 WARNING All solder cup wiring must be rated for the maximum voltage in the system For exam ple if 150V is applied to the front terminals of the DMM All matrix module wiring must be rated for 150V A connector cover must be installed on an unused D shell connector If the connector is left open an electrical shock hazard may be present Figure 8 Connecting solder cup cable assembly KEITHLEY CO connector cover Q O gt gt Install plastic cover over unused connector using two 4 40 screws Supplementary Insulation
13. morg A H Ch 34 Sense O 9 Ro LO MANC Channels 18 31 HI Multiple Channel Operation V d 8 Open all Channels Ch 32 Close Channel 133 LO oc o Close Channel 135 HI O E Multiplexer 2 E i 1 i External Source Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Test procedure 24 NOTE The following test procedure assumes a Model 7701 switching module installed in slot 1 of the mainframe Multiple channel operation from the front panel is not available for early versions of the Model 2700 Open all channels Front panel operation Press OPEN gt Display ALL gt Press OPEN Remote programming ROUT OPEN ALL Close channel 33 to isolate measure channels 1 through 16 from source channels 17 through 32 Front panel operation Press CLOSE gt Select MULTI gt Key in 133 gt Press ENTER Remote programming ROUT MULT CLOS 0133 Close channel 35 to connect measure channels 1 through 16 to DMM Input Front panel operation Press CLOSE gt Select MULTI gt Key in 135 gt Press ENTER Remote programming ROUT MULT CLOS 0135 Close channel 1 to connect DUT 1 to the DMM Front panel operation Press CLOSE Select MULTI Key in 101 Press ENTER Remote programming ROUT MULT CLOS 0101 Close channel 17 to connect DUT 1 to the external source Front panel operation Press CLOSE Select MULTI Key in 117 Pre
14. operators are adequately trained Operators use the product for its intended function They must be trained in electrical safety procedures and proper use of the instru ment They must be protected from electric shock and contact with hazardous live circuits Maintenance personnel perform routine procedures on the product to keep it operating properly for example setting the line voltage or replacing consumable materials Maintenance procedures are de scribed in the manual The procedures explicitly state if the operator may perform them Otherwise they should be performed only by service personnel Service personnel are trained to work on live circuits and perform safe installations and repairs of products Only properly trained ser vice personnel may perform installation and service procedures Keithley products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category II as described in the International Electrotechnical Commission 1EC Standard IEC 60664 Most measurement control and data I O sig nals are Measurement Category I and must not be directly connect ed to mains voltage or to voltage sources with high transient over voltages Measurement Category II connections require protection for high transient over voltages often associated with local AC mains connections Assume all measurement control and data I O connections are for connection to Category I sources unless ot
15. the DMM For added flexibility the Model 7701 is equipped with four extra screw terminals These user configurable screw terminals are hard wired to the female DB 25 connector of the switching module These screw terminals allow external input to bypass the switching module channels Although the Model 7701 relays are the latching type relays hold their state even after power has been removed all relay states are set to open a few seconds after either a power cycle or an RST command is issued System channel operation ROUT CLOS command is used to close measurement channels to connect a DUT to the DMM With a 2 wire function selected 1 e DCV system channels 1 through 32 can be closed When one of these channels is closed channel 35 automatically closes to connect the channel to the DMM Input Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 1 Simplified schematic for Model 7701 P12 External p13 Wiring Access a P25 HIO Multiplexer 1 in LO O P13 User Configurable P24 Screw Terminals P2 Channel 1 5 LO Channel 35 See Note Channels 2 15 MUX 1 DMM HI SO HI Channel 16 DE US D M Input LO 0 O 0 65 6 oLO Backplane MUX 1 DMM Channel 33 d Isolation LO LO 2 Pole Open Screw To Model 4 Pole Closed e TT Terminals 27xx DMM N anne CE See Note MESA DMM HI SHI HI Q HI Channel 17 oa Sense LO IO LO Ba
16. 0 517 8431 99 Washington Street Melrose MA 02176 TestEguipmentDepot com IDC ribbon cable connections Connect an appropriate length of 50 conductor IDC ribbon cable to a 50 pin male D shell IDC connector and connect an appropriate length of 25 conductor IDC ribbon cable to a 25 pin male D shell IDC connector Table 2 and Figure 5 provides terminal identification for the 50 pin ribbon cable connections Table 3 and Figure 6 provides terminal identification for the 25 pin ribbon cable connections The connectors of the prepared ribbon cable assemblies mate to the 50 and 25 pin D shell connectors of the Model 7701 Figure 7 Make sure an unused D shell connector has the connector cover installed Table 2 Terminal identification for 50 conductor IDC ribbon cable and 7701 DB 50 connector Ribbon Cable 7701 DB 50 Ribbon Cable 7701 DB 50 Conductor Color Terminal Pin Conductor Color Terminal Pin 1 Brown Ch1 Hi 1 26 Blue Ch 13 Lo 42 2 Red Ch 1 Lo 34 27 Violet Ch 14 Hi 26 3 Orange Ch2 Hi 18 28 Grey Ch 14 Lo 10 4 Yellow Ch2Lo 2 29 White Ch 15 Hi 43 5 Green Ch 3 Hi 35 30 Black Ch 15 Lo 27 6 Blue Ch 3 Lo 19 31 Brown Ch 16 Hi 11 7 Violet Ch 4 Hi 3 32 Red Ch 16 Lo 44 8 Grey Ch 4 Lo 36 33 Orange Ch 17 Hi 28 9 White Ch 5 Hi 20 34 Yellow Ch 17 Lo 12 10 Black Ch 5 Lo 4 35 Green Ch 18 Hi 45 11 Brown Ch6Hi 37 36 Blue Ch 18 Lo 29 12 Red Ch 6 Lo 21 37 Violet Ch 19 Hi 13 13 Orange Ch7Hi 5 38 Grey Ch 19 Lo 46 14 Yellow Ch
17. 000000000000 O 00000000000000000 O callo nis O H Ba o AN Bu o O om OE mu CT o O cos ms mm sug 003 Dn En O O 2 colo oo ol 8 3 2 Du o E ar i alla als O O a EBD De Hue pooooooooooooooo O t g Miomo O 0000000000000000 O i Secondary Side Components Side 01 Note For component information see 7701 Product Structure Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 29 7701 150V 32 Channel Differential Multiplexer GENERAL 32 CHANNELS 32 channels of 2 pole relay input All channels configur External able to 4 pole Wiring Access RELAY TYPE Latching electromechanical ACTUATION TIME lt 3ms FIRMWARE Specified for Model 2700 rev B03 and Model 2750 rev AOL co Mer Co DMM CONNECTIONS Screw terminals provide internal DMM connec 2 S j tions to channels 34 and 35 and connections to external wiring access G Terminals APABILITIE Channels 2 15 Channel 35 Screw see Note Terminals CHANNELS 1 32 Multiplex one of 32 2 pole or one of 16 4 pole signals mr A 8 m into DMM Configuration supports dual 1x16 independent multi Channel 16 Backplane plexers A S 10 LO INPUTS Pole Open f 2 Pole O Pole Closed MAXIMUM SIGNAL LEVEL Any channel to Any Channel
18. 09 3074 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Table 5 cont Model 7701 parts list Circuit Designation Description Keithley Part No FOR 7709 312A 4 40 X 1 4 LG PHIL FLAT HD SCREW 4 40 X 1 4 PHILLIPS PAN HD 4 40 X 7 16 STANDOFF BOTTOM CARD COVER CHIPLOC BAG STATIC SHIELDING D SUB CABLE KIT DUAL CONN COVER FINAL INSPECTION HOLE SIZE MULTIPLEXER 0 U JUMPER MASS TERM BRACKET MECHANICAL ASSEMBLY SCANNER PC BOARD ASSEMBLY SCANNER BOARD SURFACE MOUNT BOTTOM SCANNER BOARD THRU HOLE SCANNER BOARD SURFACE MOUNT TOP SERIAL NUMBER LABEL SURFACE MOUNT PCB TEST POINT TOP CARD COVER 4 40X 1 4PFH 4 40X1 4PPH ST 166 18 7703 301B PO 13 1 7709 306A 7709 312A 7701 FIN 51 7701 102B 32 CHANNE J 15 7709 303 2A 7701 SCAN MECH 3 7701 100B 7701 SCAN 1B 7701 SCAN 1H 7701 SCAN 1T MC 285 CS 1026 7703 302C Test Eguipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEguipmentDepot com 27 Figure 16 Model 7701 component layout Side 06
19. 7 26 Landsberger Strasse 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 7500 Fax 0118 929 7519 1 5 Eagles Street Langford Town Bangalore 560 025 080 212 8027 Fax 080 212 8005 Viale San Gimignano 38 20146 Milano 02 48 39 16 01 Fax 02 48 30 22 74 New Pier Takeshiba North Tower 13F 11 1 Kaigan 1 chome Minato ku Tokyo 105 0022 81 3 5733 7555 Fax 81 3 5733 7556 2FL URI Building 2 14 Yangjae Dong Seocho Gu Seoul 137 888 82 2 574 7778 Fax 82 2 574 7838 Postbus 559 4200 AN Gorinchem 0183 635333 Fax 0183 630821 c o Regus Business Centre Frosundaviks All 15 4tr 169 70 Solna 08 509 04 600 Fax 08 655 26 10 13F 3 No 6 Lane 99 Pu Ding Road Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031 O Copyright 2003 Keithley Instruments Inc Printed in the U S A 1 03 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com
20. Ch 32 Hi 15 Ch 26 Lo 21 Ch 32 Lo 3 Ch 27 Hi 9 Mux 2 Hi 16 Ch 27 Lo 22 Mux 2 Lo 4 Ch 28 Hi 10 11 17 Ch 28 Lo 23 5 Ch 29 Hi 12 P12 18 Ch 29 Lo 24 P24 6 Ch 30 Hi 13 P13 19 Ch 30 Lo 25 P25 Wiring NOTE _ The Model 7701 is shipped with plastic connector covers installed on the D shell connectors Each cover is secured to the connector by two screws After removing a connector cover retain it and the screws for future use Any unused D shell connector must have the connector cover installed The Model 7701 is supplied with one 50 pin male IDC ribbon cable connector and one 25 pin male IDC ribbon cable connec tor These ribbon cable connectors mate to the D shell connectors of the switching module 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 420 AWG and solder cup D shell connectors There are two connector kits that have connectors that can be used with the Model 7701 Model 7790 ribbon cable adapter kit Contains one female DB 50 one male DB 50 and one male DB 25 IDC ribbon cable connectors The two male IDC connectors mate to the D shell connectors on the Model 7701 Model 7789 50 25 pin solder cup connector kit Contains one male DB 50 and one male DB 25 solder cup con nectors These connectors mate to the D shell connectors on the Model 7701 Test Eguipment Depot 80
21. Depot com Dual independent multiplexers WARNING Multiple channel operation should only be performed by experienced test engineers who recognize the dangers associated with multiple channel closures Multiple channel operation ROUT MULT CLOS command allows individual control of switching module channels Multiple channel operation allows the switching module to be configured as two independent multiplexers The Model 7701 is normally used as a single 1 x 32 multiplexer but it can also be configured as two 1 x 16 multiplexers In Figure 1 the open position of channel 33 is shown When channel 33 is closed Multiplexer 1 channels 1 through 16 are isolated from Multiplexer 2 channels 16 through 32 For the dual multiplexer configuration only Multiplexer 1 channels can be internally connected to the DMM of the Model 27xx Closing channel 35 allows channels 1 through 16 to be measured by the DMM When using the dual multiplexer configuration Multiplexer 2 must be isolated from the sense terminals of the DMM This can be done by keeping channel 34 open or by not installing the screw terminal jumpers to DMM Sense Connections and wiring WARNING The following information is intended for qualified service personnel Do not make switching module connections unless qualified to do so To prevent electric shock that could result in serious injury or death adhere to the following safety precautions Before removing or installing the s
22. Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Connecting Model 7701 channels to DMM Perform the following steps to internally connect the channels of the Model 7701 to the DMM of the Model 27xx 1 Remove the top cover of the Model 7701 It is secured to the module case by a single screw 2 Install the four supplied 422 AWG jumpers in the screw terminals as shown in Figure 3 Position the jumpers to allow clear ance for the top cover and make sure the jumper wires do not come in contact with each other or other electrical conductors 3 Replace the top cover Figure 3 Jumper installation to connect 7701 channels to DMM Jumper A Jumper B Jumper C Jumper D Connects channels Connects channels Connects channels Connects channels D shell connectors Figure 4 shows the pin numbers for the Model 7701 rear panel connectors The 50 pin D shell is used to access channels 1 through 24 and Multiplexer 1 terminals The 25 pin D shell is used to access channels 25 through 32 and Multiplexer 2 terminals The user configurable screw terminals are also accessed at the 25 pin D shell Terminal identification for the female connector pins is provided in Table 1 Figure 4 Rear view Model 7701 pinouts DMM HI MUX 1 HI HI terminals of Multiplexer 1 1 through 16 to DMM Input HI MUX 2 HI HI terminals of Multiplexer 2 DMM SHI 17 through 32 to DMM Sense HI
23. Replaceable parts for the Model 7701 are listed in Table 5 Ordering information To place an order or to obtain information concerning replacement parts contact your Keithley representative or the factory see back cover for addresses When ordering parts be sure to include the following information Card model number Model 7701 Card serial number Part description 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 Department at 1 888 KEITHLEY for a Return Material Authorization RMA number Carefully pack the instrument in the original packing carton Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping label Component layout The component layout for the Model 7701 is provided in Figure 16 25 Test Eguipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEguipmentDepot com 26 Table 5 Model 7701 parts list Keithley Part Circuit Designation Description No C1 C3 C4 C9 C10 C11 C14 CAP 1UF 20 50V CERAMIC 1206 C 418 1 C2 C6 C17 C18 C19 C20 C23 C24 CAP 47PF 5 100V CERAMIC 0805 C 465 47P C25 C5 C98 C99 CAP 4 7UF 10 35V TANTALUM C 476 4 7 C16 CAP 220UF 20 10V TANTALUM C 558 220 CR1 CR9 CR11 CR18 CR21 CR28 DIODE DUAL SWITCHING BAV99L RF 82 CR31 CR37 SOT 23 CR41 CR42
24. Test Equipment 99 Washington Street Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431 Model 7701 Users Guide PA 769 Rev B 8 03 The Model 7701 can be used with Keithley Models 2700 2701 and 2750 All references to the Model 27xx apply to the Models 2700 2701 and 2750 A GRE MEASUREMSUIMLONFIDENCE Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com NINAS Safety Precautions The following safety precautions should be observed before using this product and any associated instrumentation Although some in struments and accessories would normally be used with non haz ardous voltages there are situations where hazardous conditions may be present This product is intended for use by qualified personnel who recog nize shock hazards and are familiar with the safety precautions re quired to avoid possible injury Read and follow all installation operation and maintenance information carefully before using the product Refer to the manual for complete product specifications If the product is used in a manner not specified the protection pro vided by the product may be impaired The types of product users are Responsible body is the individual or group responsible for the use and maintenance of equipment for ensuring that the equipment is operated within its specifications and operating limits and for en suring that
25. W MODE NORM normal or CSID common side NOTE _ Changing the 4 wire ohms mode opens all channels for all modules in the mainframe For remote programming the following commands are valid with a 7701 module installed SYSTem FRESistance TYPEx NORMal Select normal 4W mode SYSTem FRESistance TYPEx CSIDe Select common side 4W mode SYSTem FRESistance TYPEX Query 4W mode Where the x in TYPEx is the slot number for the 7701 module NOTE For the Model 2700 the SYST FRES TYPEx command is only supported in units with firmware revision B03 1 or later The command is supported for all Model 2701 and 2750 units Figure 13 Jumper installation for common side 4 wire ohms test system Jumper DMM HI 1 0f 4 MUX 1 HI Connects the DUT common side MUX 2 HI bus to DMM Input HI Connects the DUT common side DMM SHI bus to DMM Sense HI Connects the DUT to DMM Sense LO through the switching channels DMM SLO Connects DUT to DMM Input LO through the switching channels MUX 2 LO Note These screw teminal jumper connections are MUX 1 LO required for the common side 4 wire ohms test D system shown in Figure 12 DMM LO Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Test procedure NOTE The following test procedure assumes a Model 7701 switching module installed in slot 1 of the mainframe Open all channels Front panel operation Press OPEN gt Display ALL gt Pr
26. When installing equipment where access to the main power cord is restricted such as rack mounting a separate main input power dis connect device must be provided in close proximity to the equip ment and within easy reach of the operator For maximum safety do not touch the product test cables or any other instruments while power is applied to the circuit under test ALWAYS remove power from the entire test system and discharge any capacitors before connecting or disconnecting cables or jump ers installing or removing switching cards or making internal changes such as installing or removing jumpers Do not touch any object that could provide a current path to the com mon side of the circuit under test or power line earth ground Always make measurements with dry hands while standing on a dry insulated surface capable of withstanding the voltage being measured The instrument and accessories must be used in accordance with its specifications and operating instructions or the safety of the equip ment may be impaired Do not exceed the maximum signal levels of the instruments and ac cessories as defined in the specifications and operating informa tion and as shown on the instrument or test fixture panels or switching card When fuses are used in a product replace with same type and rating for continued protection against fire hazard Chassis connections must only be used as shield connections for measuring circuits NOT
27. annel 35 automatically closes to connect the measurement channel to the DMM Input With a 4 wire function selected system channels 1 through 16 can be closed When one of these channels is closed its paired channel closes and the backplane relays for sense and input channels 34 and 35 also close For a 4 wire function channels are paired as follows CH1 and CH17 CH5 and CH21 CH2 and CH18 CH6 and CH22 CH3 and CH19 CH7 and CH23 CH4 and CH20 CH8 and CH24 CH9 and CH25 CH10 and CH26 CH11 and CH27 CH12 and CH28 System channel operation for the Model 7701 is summarized as follows CH13 and CH29 CH14 and CH30 CH15 and CH31 CH16 and CH32 The lt p gt keys on the Model 27xx DMM can be used to close a system channel The CLOSE key can be used to close a system channel For the Model 2701 2750 and later versions of the Model 2700 use the SINGLE option of the CLOSE key Use the OPEN key to open all channels in the test system For the Model 2701 2750 and later versions of the Model 2700 use the ALL option of the OPEN key For remote operation the following commands are used for system channel operation ROUT CLOS lt clist gt ROUT CLOS ROUT CLOS STAT lt clist gt ROUT OPEN ALL Common side CSID 4 wire ohms Close specified system channel Returns the closed system channel Query closed channels in list 1 closed Open all channels The Model 7701 can be configured to use a common bus to perform
28. annels 25 through 32 Screw terminals and supplied jumpers to access the DMM of the Model 27xx mainframe WARNING The Model 7701 is configurable to be connected to the internal DMM via the supplied jumpers and the screw terminals When connected to the internal DMM all other modules must be derated to 150VDC or 150Vrms 212V peak for AC waveforms NOTE _ The Model 7701 is shipped from the factory with the screw terminal jumpers NOT installed See Screw terminals to install the jumpers WARNING _ Before operating the Model 27xx with an accessory card verify that the card is properly installed and the mounting screws are tightly fastened If the mounting screws are not properly connected an electrical shock hazard may be present Card configuration schematic Figure 1 shows a simplified schematic diagram of the Model 7701 module As shown the Model 7701 has input channels that are grouped into two banks of sixteen channels thirty two channels total A backplane isolation relay is provided for each bank The first bank contains channels 1 through 16 while the second bank contains channels 17 through 32 Each input chan nel of the 32 channel multiplexer card is wired with separate inputs for HI LO providing fully isolated inputs As shown in Figure 1 all Model 7701 channels are isolated from the DMM of the Model 27xx by screw terminals Supplied jumpers must be installed in the screw terminals to connect switching module channels to
29. as safety earth ground connections If you are using a test fixture keep the lid closed while power is ap plied to the device under test Safe operation requires the use of a lid interlock 5 03 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Ifa E screw is present connect it to safety earth ground using the wire recommended in the user documentation The IN symbol on an instrument indicates that the user should re fer to the operating instructions located in the manual The N symbol on an instrument shows that it can source or mea sure 1000 volts or more including the combined effect of normal and common mode voltages Use standard safety precautions to avoid personal contact with these voltages The symbol indicates a connection terminal to the equipment frame The WARNING heading in a manual explains dangers that might result in personal injury or death Always read the associated infor mation very carefully before performing the indicated procedure The CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories shall not be connected to humans Before performing any maintenance disconnect the line cord and all test cables To maintain protection from electric shock and fire replacement components in mains circuits including the power transformer test leads and i
30. ckplane MUX2 DMM Channels 18 31 Isolation LO SLO Ch 132 Hl The Model 7701 is rated for low voltage applications DUNS When connecting the 7701 to the internal DMM via LO the screw terminals all other modules in the mainframe must be derated to 150VDC or 150Vrms 212V peak H Multiplexer 2 io for AC waveforms Notes 2M Jumper to be installed by Channels 33 35 in this schematic refer to the designations used for user to connect 7701 control and not actual available channels channels to DMM Channels 33 34 and 35 can be individually controlled using multiple Figure 3 channel operation ROUT MULT commands For more information see Section 2 of the Model 27xx User s Manual With a normal 4 wire function selected i e 4 system channels I through 16 can be closed These 16 channels are paired to channels 17 through 32 channel 1 paired to channel 17 channel 2 paired to channel 18 and so on When one of these system channels is closed its paired channel and channels 33 and 34 also close to connect the DUT to the DMM With common side CSID 4 wire ohms selected system channels 1 through 32 can be measured by the DMM For this ohms mode the module is to be configured as shown in Figure 12 With CSID ohms selected channel 33 remains open and channel 35 remains closed In Figure 12 the bold lines show the signal path to test DUTI Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipment
31. erminal and chassis ENVIRONMENTAL OPERATING ENVIRONMENT Specified for 0 C to 50 C Specified to 50 R H at 35 C STORAGE ENVIRONMENT 25 C to 65 C WEIGHT lt 0 52kg 1 16 Ib ACCESSORIES AVAILABLE Model 7789 50 25 Pin Male D Shell Solder Cup Connectors Model 7790 50 50 25 Pin Female Male D Shell IDC Connectors 4 30 01 Rev B Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Specifications are subject to change without notice All Keithley trademarks and trade names are the property of Keithley Instruments Inc All other trademarks and trade names are the property of their respective companies KEITHLEY Keithley Instruments Inc Sales Offices BELGIUM CHINA FINLAND FRANCE GERMANY GREAT BRITAIN INDIA ITALY JAPAN KOREA NETHERLANDS SWEDEN TAIWAN 28775 Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY 534 8453 www keithley com Bergensesteenweg 709 B 1600 Sint Pieters Leeuw 02 363 00 40 Fax 02 363 00 64 Yuan Chen Xin Building Room 705 12 Yumin Road Dewai Madian Beijing 100029 8610 8225 1886 Fax 8610 8225 1892 Tiet j ntie 2 e 02130 Espoo Phone 09 54 75 08 10 Fax 09 25 10 51 00 3 all e des Garays 91127 Palaiseau C dex 01 64 53 20 20 Fax 01 60 11 7
32. ess OPEN Remote programming ROUT OPEN ALL Select Q4 function Front panel operation Press O4 key Remote programming SENS FUNC FRES Select the common side CSID 4 wire ohms mode Front panel operation Press SHIFT gt Press CARD gt Select CONFIG gt Select SLOTI 7701 gt Select 4W MODE CSID Remote programming SYST FRES TYPE1 CSID Close channel 1 to test DUT1 Front panel operation Press the key to close the first channel Ch 1 Remote programming ROUT CLOS 101 Measure DUT 1 Front panel operation Take reading from display Remote programming DATA for continuous triggering mode READ for one shot triggering mode Close next channel to test DUT Front panel operation Press the W key to close the next channel Ch 2 Remote programming ROUT CLOS 102 Measure DUT Front panel operation Take reading from display Remote programming DATA for continuous triggering mode READ for one shot triggering mode In general repeat steps 6 and 7 to test DUT3 through DUT32 That is close the DUT input channel and take a measurement After all DUT is tested repeat step 1 to open all channels 10 Return the Model 27xx to the normal ohms mode Front panel operation Press SHIFT gt Press CARD gt Select CONFIG gt Select SLOTI 7701 gt Select 4W MODE NORM Remote programming SYST FRES TYPE1 NORM Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 Tes
33. her wise marked or described in the Manual Exercise extreme caution when a shock hazard is present Lethal voltage may be present on cable connector jacks or test fixtures The American National Standards Institute ANSI states 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 measuring Operators of this product must be protected from electric shock at all times The responsible body must ensure that operators are pre vented access and or insulated from every connection point In some cases connections must be exposed to potential human con tact Product operators in these circumstances must be trained to protect themselves from the risk of electric shock If the circuit is capable of operating at or above 1000 volts no conductive part of the circuit may be exposed Do not connect switching cards directly to unlimited power circuits They are intended to be used with impedance limited sources NEVER connect switching cards directly to AC mains When con necting sources to switching cards install protective devices to lim it fault current and voltage to the card Before operating an instrument make sure the line cord is connect ed to a properly grounded power receptacle Inspect the connecting cables test leads and jumpers for possible wear cracks or breaks before each use
34. inal identification for 25 conductor IDC ribbon cable and 7701 DB 25 connector Ribbon Cable 7701 DB 25 Ribbon Cable 7701 DB 25 Conductor Color Terminal Pin Conductor Color Terminal Pin 1 Brown Ch25Hi 1 14 Yellow Ch31 Lo 20 2 Red Ch 25 Lo 14 15 Green Ch 32 Hi 8 3 Orange Ch26Hi 2 16 Blue Ch 32 Lo 21 4 Yellow Ch26Lo 15 17 Violet Mux 2 Hi 9 5 Green Ch 27 Hi 3 18 Grey Mux 2 Lo 22 6 Blue Ch 27 Lo 16 19 White 7 Violet Ch 28 Hi 4 20 Black 8 Grey Ch 28 Lo 17 21 Brown 9 White Ch 29 Hi 5 22 Red P24 24 10 Black Ch 29 Lo 18 23 Orange P12 12 11 Brown Ch30Hi 6 24 Yellow P25 25 12 Red Ch 30 Lo 19 25 Green P13 13 13 Orange Ch31 Hi 7 25 conductor IDC ribbon cable is available from Keithley Part 15025 Figure 6 25 conductor ribbon cable terminal identification 25 Pin D Shell Male IDC IDC Ribbon Cable 25 Conductor 1 Brown HI 2 Red LO Channel 25 3 Orange HI 4 Yellow LO Channel 26 5 Green HI 6 Blue LO Channel 27 7 Violet HI 8 Grey LO Channel 28 9 White HI 10 Black LO Channel 29 11 Brown HI 12 Red LO Channel 30 13 Orange HI 14 Yellow LO Channel 31 15 Green HI 16 Blue LO Channel 32 17 Violet Hi i 18 Grey 10 Multiplexer 2 19 White 20 Black 21 Brown 22 Red P24 23 Orange
35. nel Color Description Description Color Channel wx p L wna CHI _ H CHIT CH2 L CH18 CH3 P E CH19 CH4 7 E CH20 CH5 E H m CH6 7 H c2 CH7 E CH23 CH8 E CH24 CH9 za E CH25 CH10 7 CH26 CH11 E E CH27 CH12 E t CH28 CHI3 r TL CH29 CH14 TJ CH30 CHIS r L CHSI CH16 Leu Operation Detailed information to close and open switching module channels are provided in Section 2 of the Model 2700 or 2750 User s Manual The following summarizes basic operation and provides operating information specific to the Model 7701 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Channel assignments The Model 2700 has two slots for switching modules and the Model 2750 has five slots To control the appropriate switching module the slot number must be included with the switching module channel number when you specify a channel The chan nel assignment is formatted as follows SCH where Sis the slot number CH is the channel number Examples 101 Slot 1 Channel 1 210 Slot 2 Channel 10 506 Slot 5 Channel 6 Model 2750 NOTE For remote operation the 3 digit channel assignment is included in the channel list parameter for the commands System channel operation System channel operation is used to connect measurement channels to the Model 27xx DMM With 2 wire function selected system channels 1 through 32 can be closed When one of these channels is closed ch
36. ning channel 34 isolates the external source from the backplane of the Model 2750 This channel must remain open while testing DUT Closing channel 35 connects an input channel 1 through 16 to the DMM This channel must remain closed while testing DUT In Figure 15 channels and 17 are closed to test DUT 1 The test for the other DUTs is similar except that different source and measure channels are closed Closed channels for each DUT test are listed as follows Tested Device Closed Channels Tested Device Closed Channels DUT 1 1 17 33 and 35 DUT 9 9 25 33 and 35 DUT 2 2 18 33 and 35 DUT 10 10 26 33 and 35 DUT 3 3 19 33 and 35 DUT 11 11 27 33 and 35 DUT 4 4 20 33 and 35 DUT 12 12 28 33 and 35 DUT 5 5 21 33 and 35 DUT 13 13 29 33 and 35 DUT 6 6 22 33 and 35 DUT 14 14 30 33 and 35 DUT 7 7 23 33 and 35 DUT 15 15 31 33 and 35 DUT 8 8 24 33 and 35 DUT 16 16 32 33 and 35 22 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 15 Biasing and measuring DUT test system multiple channel operation A u Iplexer LOO HI Q O O LO Note Installation of the four screw Close Channel 101 Close Channel 111 terminal jumpers is shown p Channels 2 15 An oH O O OO Q Q O HI DUT ChT6 NE Ch 35 Input Te O O OO C9 69 90 LO OOOO i Jumper l Ch 33 Pasas Closed 6
37. nput jacks must be purchased from Keithley Instru ments Standard fuses with applicable national safety approvals may be used if the rating and type are the same Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component Note that se lected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product If you are unsure about the applicability of a replacement component call a Keithley Instruments office for information To clean an instrument use a damp cloth or mild water based cleaner Clean the exterior of the instrument only Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument Products that consist of a circuit board with no case or chassis e g data acquisition board for installation into a computer should never require cleaning if handled according to in structions If the board becomes contaminated and operation is af fected the board should be returned to the factory for proper cleaning servicing Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com KEITHLEY Model 7701 Keithley Instruments Inc pp _ AAA 28775 Aurora Road 1 Cleveland Ohio 44139 User S G u ide 440 248 0400 Fax 440 248 6168 www keithley com The information in this section is organized as follows Card config
38. ss ENTER Remote programming ROUT MULT CLOS 117 Measure DUT 1 Front panel operation Take reading from display Remote programming DATA for continuous triggering mode READ for one shot triggering mode Open channels 1 and 17 to disconnect the DMM and external source from DUT 1 Front panel operation Press OPEN Select MULTI Key in 101 Press ENTER Press OPEN Select MULTI Key in 117 Press ENTER Remote programming ROUT MULT OPEN 101 117 In general repeat steps 4 through 7 to test DUT 2 through DUT 16 That is close the channels to connect the DUT to the DMM and external source take a measurement and then open the channels to disconnect the DUT from the DMM and external source After all DUT is tested repeat step 1 to open all channels Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Service Service for the Model 7701 includes a procedure to verify performance and provides replaceable parts information WARNING All service information is intended only for qualified service personnel Do not attempt to service the Model 7701 unless you are qualified to do so Performance verification Use the performance verification procedure for the Model 7701 This procedure is provided in PA 775 of this manual Replaceable parts This section contains replacement parts information and the component layout drawing for the Model 7701 Parts list
39. tEquipmentDepot com Multiple module system Figure 12 shows a one card test system to perform common side ohms measurements on up to 32 DUT The test system can be expanded to test more DUT by adding one or more modules Models 2700 and 2701 Adding a second Model 7701 to the test system allows up to 64 DUT to be tested Model 2750 Use up to five Model 7701s to test up to 160 DUT When adding a Model 7701 module to a common side ohms test system you must wire the card properly to minimize path resistance especially for low ohms measurements Figure 14 shows how to properly wire a multiple card system for common side ohms measurements This connection scheme will minimize signal path resistance through the backplane connections of the modules Notice that for the second module slot 2 the P12 and P13 terminals are not used Only the P12 and P13 terminals of the first module are to be connected It is best to use one common side bus for all DUT However if more than one bus must be used connect them together using a bus jumper as shown in Figure 14 20 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 14 Multiple module test system common side ohms i Keithley 7701 Switching Module ip Pl SLOT 1 I Input HI P amp S Sense Hl gt Q DUT16 DUT17 HI LO H da ke DUT32 Common Side Bus lt Bus Jumper lt 27xx
40. uration schematic on page 2 Connections and wiring on page 4 Screw terminals on page 4 D shell connectors on page 6 Wiring on page 7 Typical connections on page 12 Connection log on page 14 Operation on page 14 Channel assignments on page 15 e System channel operation on page 15 Multiple channel operation on page 16 Applications on page 17 Service on page 25 Performance verification on page 25 Replaceable parts on page 25 Specifications on page 30 PA 769 Rev B 8 03 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Introduction NOTE The 7701 module can be used with Keithley Models 2700 2701 and 2750 All references to the Model 27xx apply to the Models 2700 2701 and 2750 The Model 7701 is a 32 channel high speed differential multiplexer module and has the following features Voltage measurements DC and AC Frequency and period measurements Normal ohms measurements 2 wire ohms to test up to 32 DUT e 4 wire ohms to test up to 16 DUT Normal Q4 automatically pairs switches for four wire measurements n 16 Common side 4 wire ohms measurements Configures the module to allow use of a common bus to perform 4 wire ohms measurements on up to 32 DUT Temperature applications RTD or thermistor 50 pin female D Shell connector DB 50 for channels 1 through 24 25 pin female D Shell connector DB 25 for ch
41. witching module in the mainframe make sure the mainframe 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 specifications of the Model 7701 Specifications are provided at the end of this section WARNING The Model 7701 is configurable to be connected to the internal DMM via the supplied jumpers and the screw terminals When connected to the internal DMM all other modules must be derated to 150VDC or 150Vrms 212V peak for AC waveforms Screw terminals The screw terminals of the Model 7701 are shown in Figure 2 As shown screw terminals are provided to connect the switch ing module channels to the DMM User configurable screw terminals are also provided to allow external input to bypass the switching module channels Four jumpers are supplied with the Model 7701 for use with the screw terminals As shown in Figure 2 the Model 7701 is shipped with the jumpers not installed With the jumpers not installed all input to the Model 7701 is electrically isolated from the DMM Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com Figure 2 Model 7701 screw terminals Screw Terminals to Connect 7701 Channels to DMM DMM HI User Configurable Screw Terminals MUX 1 HI MUX 2 HI DMM SHI S d Cd ld Zld Test

Model 7701 - Test Equipment Depot

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