Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley 77xx 77xxCommonMode

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.



Image preview - the first page of the document



>> Download 77xxCommonMode documenatation <<

Text preview - extract from the document

How are maximum input voltage and maximum common mode voltage related on the
Integra series (e.g.77xx) modules?

Each analog channel on a 77xx switch module has a HI and a LO terminal for connection of the
signal of interest. This connection has a maximum signal level specification. Additionally, the
77xx module has a Common Mode Voltage specification. Common mode voltage is the potential
difference between the 27xx mainframe's chassis ground and the HI or LO terminals. In effect, it
is the amount by which the signal can be floated relative to chassis ground.




The input voltage and common mode voltage are listed as follows.

Switch          Maximum            Maximum Voltage        Maximum Voltage
Module          Common Mode        between module HI      between module
                Voltage(VCM)       and LO                 HI and LO
                                   Assume MAXIMUM         Assume
                                   VCM                    VCM = 0V
7700            300V               0V                     300V
7701            300V               0V                     150V
7702            300V               0V                     300V
7703            300V               0V                     300V
7705            300V               0V                     300V
7706            300V               0V                     300V
7707            300V               0V                     300V
7708            300V               0V                     300V
7709            300V               0V                     300V
7710            300V               0V                     60V
7711            0V                 60V                    60V
7712            0V                 30V                    30V


The maximum allowed input voltage at the HI and LO terminals is the difference between the
maximum allowed common mode voltage (from specification) and the actual common mode
voltage present in your system.

For example on the 7700 module where the common mode voltage specification is 300V and the
maximum input voltage specification is 300V:
    

◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo