Agilent Technologies 66001A - Manual (Page 19)

Installation 19
Remote Inhibit (RI) Function Switches
This function allows the power module outputs to be shut down from a signal (low-true TTL level) applied to the mainframe
INH input. The INH input is internally connected to the mainframe remote inhibit (RI) line. This line is normally high and
is distributed to all power modules in the mainframe. An external switch closure that shorts the mainframe INH input is
detected by the power module as an RI signal.
Note See "Chapter 3 - Connections" in the mainframe Installation Guide for more information on external INH
connections.
Within each power module, the RI signal is applied to the RI section of the configuration switch (see Figure 2-2). The RI
switch allows you to select one of the following responses to the RI input signal:
Switch Setting RI Action
RI disabled The module ignores the RI input signal
RI latched The module shuts down and remains shut down when the RI signal goes true. A
software command is required to restore the output (see "Chapter 4 - Basic
Power Module Commands").
RI nonlatched (real-time) The module shuts down only as long as the RI signal is true (TTL low). The
output is restored when the RI signal goes false (TTL high).
Display Function Switch
A single switch configures the display function. Use it to permanently turn the power module voltage and current display
indicators off or on (the annunciators are unaffected by this switch). If the switch is left in the ON position, the display may
be turned on or off by software commands (see the power module Programming Guide).
Calibration Function Switches
The calibration switches allow you to select one of the following modes of calibration:
Switch Setting Calibration Mode
Normal calibration Permits normal calibration (requires entry of a password)
Factory calibration Restores original factory calibration (no password is required)
Inhibit calibration Prevents calibration
The factory position is useful if the power module has been miscalibrated or if the calibration password has been lost.
Power-On Function Switch
This switch allows you to determine the operating state of the power module when it is turned on. With the switch set to 1
(on), the power module will be in the factory-default reset state (see *RST in "Chapter 3 - Language Dictionary" of the
power module Programming Guide). If you move the switch to 0, the power module will turn on to whatever state you save
to memory location 0. See "Chapter 4 - Basic Power Module Commands" for more information.