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Digital input
Each of the three pins can be configured as digital input only. The ground reference for the input pins is Signal
Common on pin 4.
From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Select the pin you wish to configure. For example, press Pin 1 to configure Pin 1.
3. Press Function and select Digital In . Select and program the remaining pins in the same manner. Press Back to
return to previous page.
4. Configure the polarity for each of the pin. Press Polarity Pos to select Positive and Polarity Neg to select Neg-
ative. Select and program the remaining pins in the same manner.
5. The In and Out field only apply to the Digital I/O and Digital In functions. The In field reflects the condition of the
external signal that is applied to the pins. The pin state is not affected by the value of the binary output word.
From the remote interface:
To configure the pin function:
DIG:PIN 1:FUNC DINP
To select the pin polarity:
DIG:PIN 1:POL POS
DIG:PIN 1:POL NEG
To read the pin data:
DIG:INP:DATA?
Fault output
Pins 1 and 2 can be configured as a fault output. The Fault Output function enables a fault condition on any channel
to generate a protection fault signal on the digital port. The following conditions will generate a fault event: over-
voltage, over-current, over-temperature and inhibit signal.
Both pins 1 and 2 are dedicated to this function. Pin 1 is the fault output; pin 2 is the common for pin 1. This
provides for an optically-isolated output. The polarity of pin 1 can also be configured. Note that the fault output
signal remains latched until the fault condition is removed and the protection circuit is cleared.
Pin 2's selected function is ignored. Pin 2 should be connected to the ground of the external circuit.
Keysight EL30000 Series User's Guide
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