You can also connect the Inhibit input to a manual switch or external control signal that will short the
Inhibit pin to common whenever it is necessary to disable all outputs. Negative polarity must be
programmed for all pins in this case. You can also use the Fault output to drive an external relay circuit
or signal other devices whenever a user-definable fault occurs.
Clearing a System Protection Fault
To restore all instruments to a normal operating condition when a fault condition occurs in a daisy-
chained system protection configuration, two fault conditions must be removed:
1. The initial protection fault or external Inhibit signal.
2. The subsequent daisy-chained fault signal (which is sourced by the Inhibit signal).
Even when the initial fault condition or external signal is removed, the fault signal is
still active and will continue to shut down the outputs of all the units.
To clear the daisy-chained fault signal if the operating mode of the Inhibit input is Live, simply clear the
output protection on any ONE unit as explained under Clearing Protection Functions. If the operating
mode of the Inhibit input is Latched, turn off the Inhibit input on ALL units individually. To re-enable the
chain, re-program the Inhibit input on each unit to Latched mode.
Output State
Only pins 4 through 7 can be configured to control the output state. This function lets you connect
multiple Keysight N6700 mainframes together and synchronize the output on/off sequence across
mainframes. Refer to Synchronizing Output Turn-On for detailed information.
Keysight N6700C Operating and Service Guide 153
4 Operating the Power System
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