User`s guide

Using the Digital Port Appendix B
Series N6700 User’s Guide 105
Configuring the Digital Control Port
Bi-directional Digital I/O
Each of the seven pins can be configured as general purpose bi-
directional digital inputs and outputs. The polarity of the pins can
also be configured. Pin 8 is the signal common for the digital I/O pins.
Data is programmed according to the following bit assignments:
Pin 7 6 5 4 3 2 1
Bit weight
6 (msb)
5
4
3
2
1
0 (lsb)
To configure the pins for digital I/O:
Front Panel:
SCPI Command:
Select System\IO\DigPort\Pins.
Select a pin in the Pin field.
In the Function field, select Dig I/O.
In the Polarity field, select either
Positive or Negative.
To send data to the pins, select
System\IO\DigPort\Data.
Select the Data Out field and enter
the binary word.
To configure the pin function:
DIG:PIN<1-7>:FUNC DIO
To configure pin polarity:
DIG:PIN<1-7>:POL <pol>
To send data to the pins:
DIG:OUTP:DATA <data>
The digital I/O pin can be used to control both relay circuits as well
as digital interface circuits. The following figure illustrates typical
relay circuits as well as digital interface circuit connections using the
digital I/O functions.
B) Digital Interface CircuitsA) Relay Circuits
TTL, AS, CMOS, HC
Relay driver
Pins 1 - 7
(contain internal
clamp diodes for
inductive flyback)
Coil
Current
0.1 A
Max.
16.5 V Max.
Digital Output
Pins 1 - 7
Digital Input
Pins 1 - 7
1 2 3 4 5 6 7
I
1 2 3 4 5 6 7
I
1 2 3 4 5 6 7
I