Digital Port Functions Appendix B
Series E4360 User’s Guide 101
As shown in the previous figure, when the Fault outputs and Inhibit
inputs of several mainframes are daisy-chained, an internal fault
condition in one of the mainframes will disable all of them without
intervention by either the controller or external circuitry. You must select
the
same polarity (either positive or negative) for all FLT and INH pins in
the daisy chain.
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 output channels in the mainframe.
Negative
polarity must be programmed for all FLT and INH 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, two fault conditions must be removed:
1. The initial protection fault or external inhibit signal.
2. The daisy-chained FLT signal that is sourced by the latched INH
signal.
NOTE
Even when the fault condition or external signal is removed, the INH
signal is still active and will continue to shut down the outputs of the
mainframes.
To clear the daisy-chained fault signal when the Inhibit input is latched,
turn off the Inhibit input on
ALL mainframes individually. To re-enable
the chain, the Inhibit input on each mainframe must be re-programmed
to Latched mode.
Output On/Off Couple
This function lets you connect multiple Keysight E4360 mainframes
together and have the output On/Off state coupled across mainframes.
The following figure shows pins 6 and 7 configured as output couple
pins.
Common
1 2 3 4 5 6 7
I
1 2 3 4 5 6 7
I
1 2 3 4 5 6 7
I
Mainframe #1 Mainframe #2 Mainframe #3
ON Couple
OFF Couple
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