Keithley 2280 Series - Page 134

Section 3: Functions and features Series 2280 Precision DC Power Supply Reference Manual
3-20 077085503 / March 2019
Figure 62: Digital I/O port
Series 2280 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)
6
I/O line 5
7*
+5 V line
8
I/O line 6
9
Ground
* Use this pin to drive external logic circuitry. Maximum current output is 500 mA. This line is protected by a
self-resetting fuse.
The following figure shows the basic configuration of the digital I/O port.
Figure 63: Digital I/O port configuration