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Keithley 2657A-LIM-3 LO User Manual

Interconnect module
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Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
http://www.keithley.com
Description
The Model 2657A-LIM-3 LO Interconnect Module establishes measurement commons (LO and sense LO) for a test
system using multiple source-measure units (SMUs) that includes at least one Model 2657A High Power System
SourceMeter Instrument.
The Model 2657A-LIM-3 connects LO terminals for up to three instruments. SMUs that can be used with the
Models 2657A-LIM-3 and 2657A include:
•
Model 2611A Single-Channel System SourceMeter Instrument
•
Model 2612A Dual-Channel System SourceMeter Instrument
•
Model 2635A Single-Channel System SourceMeter Instrument
•
Model 2636A Dual-Channel System SourceMeter Instrument
•
Model 4200-SCS Semiconductor Characterization System SMUs:
•
Model 4200-SMU Medium Power Source-Measure Unit
•
Model 4210-SMU High Power Source-Measure Unit
The Model 2657A-LIM-3 creates a single-point interlock connection for SMUs connected to the interlock input
terminals. When the interlock circuit is interrupted by an open interlock switch, the outputs of all SMUs will disable.
Electrical characteristics
•
DC current carrying capability: 1.5 A maximum
•
Pulse current carrying capability: 10 A at 1% duty cycle
•
Maximum voltage between LO and chassis ground*: 3000 V
* When connecting a lower voltage source-measure unit (SMU) to the Model 2657A-PM-200 protection module, the
maximum voltage between LO and chassis ground is limited by the protection module.
Mounting Model 2657A-LIM-3 and Model 2657A-PM-200
You can mount one or two Model 2657A-PM-200 protection modules on top of the Model 2657A-LIM-3 using the
supplied hardware.
The supplied mounting bracket can be used to mount the Model 2657A-LIM-3 anywhere you want.
PA-1063 Rev. A / March 2012
Model 2657A-LIM-3 LO Interconnect Module
Figure 1: Model 2657A-LIM-3 LO Interconnect Module
User's Guide
1

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Summary of Contents for Keithley 2657A-LIM-3 LO

  • Page 1 1-888-KEITHLEY http://www.keithley.com Description The Model 2657A-LIM-3 LO Interconnect Module establishes measurement commons (LO and sense LO) for a test system using multiple source-measure units (SMUs) that includes at least one Model 2657A High Power System SourceMeter Instrument. Figure 1: Model 2657A-LIM-3 LO Interconnect Module The Model 2657A-LIM-3 connects LO terminals for up to three instruments.
  • Page 2 Model 2657A-LIM-3 LO Interconnect Module Mounting the Model 2657A-PM-200 protection modules onto the Model 2657A-LIM-3 The Model 2657A-PM-200 protection modules may be mounted to the top or bottom of the Model 2657A-LIM-3. The assembly drawings below show top-side mounting. A formed bracket and three long screws are supplied with the Model 2657A-LIM-3. Use the bracket and screws to secure the protection modules to the top of the Model 2657A-LIM-3.
  • Page 3 Model 2657A-LIM-3 LO Interconnect Module Mounting the Model 2657A-LIM-3 The Model 2657A-LIM-3 comes supplied with a flat mounting bracket. It is recommended that the Model 2657A- LIM-3 be secured in place under normal use. The flat mounting bracket can be used to secure the device on a prober, in a rack system, on a bench or in a test fixture.

  • Page 4: Connect The Model 2657A-Lim-3 To Protective Earth

    Model 2657A-LIM-3 LO Interconnect Module Figure 5: Mounting plate attached to the rear of the Model 2657-LIM-3 Connect the Model 2657A-LIM-3 to protective earth Referring to the drawing below, connect one lugged end of the Model CA-568-120 ground cable to the screw terminal on the Model 2657A-LIM-3 and connect the other lugged end to protective earth (safety ground).

  • Page 5: Safety Interlock And Test Enclosure For Dut

    Model 2657A-LIM-3 LO Interconnect Module Safety interlock and test enclosure for DUT The test system uses the Model 2657A High Power System SourceMeter Instrument, which requires the use of the safety interlock. A properly configured safety interlock disables power from the source-measure units (SMUs) when the lid or door of a test enclosure for the device under test (DUT) is opened.

  • Page 6: Connections Using Model 2657A Source-Measure Units

    Model 2657A-LIM-3 LO Interconnect Module Refer to the Model 2657A-PM-200 User's Guide for additional information on connecting a SMU to the protection module. Connections using Model 2657A source-measure units You can use the Model 2657A-LIM-3 with multiple Model 2657A source-measure units (SMUs).

  • Page 7: Connection Summary

    Model 2657A-LIM-3 LO Interconnect Module Connection summary Use the connection drawing below to connect Model 2657A source-measure units (SMUs) to the test system. The drawing shows connections for 4-wire sensing. For 2-wire applications, the SENSE HI connector of the Model 2657A SMUs is not used.
  • Page 8 Model 2657A-LIM-3 LO Interconnect Module Figure 8: Connections using two Model 2657A SMUs PA-1063 Rev. A / March 2012...
  • Page 9 Model 2657A-LIM-3 LO Interconnect Module Connections using a Model 2657A and a Model 2611A or 2612A You can use the Model 2657A-LIM-3 with a Model 2657A source-measure unit (SMU) and the Model 2611A or 2612A SMU. Typical test configurations A. One Model 2611A or 2612A (one channel), one Model 2657A, 2-wire sensing B.
  • Page 10 Model 2657A-LIM-3 LO Interconnect Module Do not convert triaxial cables to BNC cables. Using BNC cables removes protection from the Model 2611A or 2612A and may result in damage to the SMU. You must use triaxial cables to connect to the lower-voltage SMU.
  • Page 11 Model 2657A-LIM-3 LO Interconnect Module Figure 9: Connections using a Model 2657A and a Model 2611A or 2612A PA-1063 Rev. A / March 2012...
  • Page 12 Model 2657A-LIM-3 LO Interconnect Module Connections using a Model 2657A and a Model 2635A or 2636A You can use the Model 2657A-LIM-3 with a Model 2657A source-measure unit (SMU) and the Model 2635A or 2636A SMU. Typical test configurations A. One Model 2635A or 2636A (one channel), one Model 2657A, 2-wire sensing B.
  • Page 13 Model 2657A-LIM-3 LO Interconnect Module Figure 10: Connections using a Model 2657S and a Model 2635A or 2636A PA-1063 Rev. A / March 2012...
  • Page 14 Model 2657A-LIM-3 LO Interconnect Module Connections using a Model 2657A and Model 4200-SCS SMUs You can use the Model 2657A-LIM-3 with a Model 2657A source-measure unit (SMU) and the Model 4200-SCS SMUs. Typical test configurations A. One Model 4200-SCS SMU, one Model 2657A, 2-wire sensing B.
  • Page 15 LO, SL (LO and sense LO) connector of each protection module using triaxial tees (such as the Keithley Model 237-TRX-T) and additional triaxial cables (Model 4200-TRX). If using a Model 4200-SCS SMU with the Model 4200-PA remote preamplifier (preamp), refer to the Model 2657A-PM-200 Protection Module User's Guide for information about connecting the protection module to the preamp.
  • Page 16 Model 2657A-LIM-3 LO Interconnect Module Figure 11: Test system connections using a Model 2657A and a Model 4200-SCS SMU PA-1063 Rev. A / March 2012...

  • Page 17: Safety Precautions

    Keithley Instruments 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 (IEC) Standard IEC 60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages.
  • Page 18 (note that selected 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.

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