Digital Port Functions Appendix B
Series E4360 User’s Guide 97
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
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\Pin<n>,
where <n> is the pin number.
Select Function, then Digital I/O.
Go back one level, select Polarity,
then 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
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