Features and Functions 3
Keysight 34980A Mainframe User’s Guide 131
Safety Interlock
The Safety Interlock feature prevents connections to the Analog Buses if no
terminal block or properly-wired cable is connected to a module (available on
multiplexer and matrix modules only).
Normally, if you attempt to connect to the Analog Buses without a terminal block
or properly-wired cable connected, an error is generated. You can, however,
temporarily disable errors generated by the Safety Interlock feature. This
simulation mode may be useful during test system development when you may
not have connected any terminal blocks or cables to your module.
This feature is available from the remote interface only
– The simulation mode applies to the entire mainframe and cannot be selectively
used on individual modules.
– When the simulation mode is enabled, the Analog Bus relays will appear to
close and open as directed. For example, no errors are generated if you close
an Analog Bus relay from the front panel, remote interface, or Web Interface.
However, remember that the Safety Interlock feature prevents the actual
hardware state of the Analog Bus relays from being changed. When you
connect a terminal block or cable to the module, the Analog Bus relays will be
closed.
– The simulation setting is stored in volatile memory and will be lost when power
is turned off. To re-enable the simulation mode after power has been off, you
must send the command again.
Remote Interface Operation:
SYSTem:ABUS:INTerlock:SIMulate
{OFF|ON}
The Safety Interlock feature is implemented in hardware on the modules and
cannot be circumvented. Regardless of whether the simulation mode is enabled
or disabled, all Analog Bus connections are prohibited as long as no terminal
block or properly-wired cable is connected to the module.
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