Keithley DMM7510

Section
3: Functions and features Model DMM7510 7½ Digit Graphical Sampling Multimeter
Reference Manual
3-48 DMM7510-901-01 Rev. B / May 2015
Digital I/O connector and pinouts
The digital I/O port uses a standard female DB-9 connector, which is located on the rear panel of the
Model DMM7510. You can connect to the Model DMM7510 digital I/O using a standard male DB-9
connector. The port provides a connection point to each of the six digital I/O lines and other
connections as shown in the following table.
Figure 120: Model DMM7510 digital I/O port
Model DMM7510 digital I/O port pinouts
Pin Description
1
I/O line #1
2
I/O line #2
3
I/O line #3
4
I/O line #4
5
V
ext
line (relay flyback diode protection; maximum 33 V)
6
I/O line #5
7 +5 V line. Use this pin to drive external logic circuitry. Maximum
current output is 500 mA. This line is protected by a self-
resetting fuse (one-hour recovery time).
8
I/O line #6
9
Ground