Using the External Shutdown Function
M370046-01 3-31
3
Defining the Polarity of the External Shutdown Signal
1. Turn the mode control knob to the PRT position or press the Rotary
knob/Enter button if the control knob is already at the PRT position.
PrO OUP is displayed on the output voltage display.
2. Turn the Rotary knob/Enter button until PrO SD is displayed.
3. Press the Rotary knob/Enter button to display SD 0 (shutdown on
logic 0) or SD1 (shutdown on logic 1).
4. Press the Rotary knob/Enter button to commit the desired polarity
setting.
For example: If you set the shutdown logic to 1 (SD1) and apply a
logic high (greater than 1.2 Vdc) to pin J3.12 relative to pin J3.6 on
the ISOL connector, the power supply will shut down. Conversely, if
you set the shutdown logic to 0 (SD0), the power supply will only
operate when you have a logic high (greater than 1.2 Vdc) to pin J3.2
relative to pin J3.6.
The SCPI command (s) for these instructions are:
[:]OUTPut[<channel>]:POLarity
Important:
There is an internal pullup resistor inside the shutdown circuit so
the shutdown polarity should be set to 0 if it is not being used.
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