B+K precision 9830B Series, User Manual

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13 Digital I/O
The digital I/O interface is used to control or monitor the Instrument. Refer to the figure below
describing the digital I/O 25-pin.
Figure 46 - Digital IO Pinout
Pin Name I/O Definition Range
1 Ext_V IN External reference voltage input pin. (reference
ground: AGND)
In DC mode, enter -10V to +10V to control the
DC output.
In AC mode, enter 0 to +10V to control the AC
output.
Not supported in AC+DC mode. -10 V to 10 V (DC)
0 to +10 V (AC)
2 15 VDC OUT +15VDC output. (reference ground: AGND) (15±0.8) V, 100 mA
3 NONE
4 AC ON OUT When the output of the Instrument is active, the
voltage level of this pin is high (5V); otherwise
the voltage level is low (0V). (reference ground:
DGND)
5 V, 0 V, 1 mA
5 Reserved Reserved
6 Reserved Reserved
7 /Ext_OnOff IN This pin is used with Trigger_in (pin17).
When the voltage level of this pin is low, the
Instrument will stop output. When the voltage
level is high, the Instrument will start output.
(Refer to the description below for more details) 5 V
8 DGND PWR Digital ground
9 /SYNC OUT The synchronize signal
12 V
，
10 mA
10 DGND PWR Digital ground
11 Tx OUT RS232 transmitter
±9 V
，
10 mA
12 NONE