Fault Output
Pins 1 and 2 can be configured as a fault-output pair. The Fault Output function enables a fault
condition to generate a protection fault signal on the digital port. Refer to Programming Output
Protection for a list of protection signals.
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. When the
pin polarity is POSitive, a fault condition causes the isolated output to conduct. Note that the Fault
output signal remains latched until the fault condition is removed and the protection circuit is cleared.
as explained under Clear Output Protection.
Pin 2's selected function is ignored. Pin 2 should be connected to the ground of the
external circuit.
SCPI Command
To configure the Fault function:
DIG:PIN1:FUNC FAUL
To select the pin polarity:
DIG:PIN1:POL POS
Inhibit Input
Pin 3 can be configured as a remote inhibit input. The Inhibit Input function lets an external input signal
control the output state of instrument. The input is level triggered. The signal latency is 5
microseconds. Pin 8 is the common for pin 3. The following non-volatile inhibit input modes can be
programmed:
LIVE - allows the enabled output to follow the state of the Inhibit input. When the Inhibit input is true,
the output is disabled. When the Inhibit input is false, the output is re-enabled.
OFF - The Inhibit input is ignored.
To configure the Inhibit Input function:
SCPI Command
To select the Inhibit function:
DIG:PIN3:FUNC INH
To select the pin polarity:
DIG:PIN3:POL POS
To specify the Inhibit mode:
OUTP:INH:MODE LATC
OUTP:INH:MODE OFF
Keysight MP4300 Series Operating and Service Guide 91
4 Using the Modular Power System
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