Section 3: Rear Panel
Series 3700 System Switch/Multimeter User's Manual
3-4
3700S-900-01 Rev. C / July 2008
Connecting cables
Use a cable equipped with a standard male DB-25 connector (Keithley
Instruments part number CA-126-1).
Digital I/O lines (pins 1 through 14)
The port provides 14 digital I/O lines. Each output is set high (+5V) or low (0V)
and can read high or low logic levels.
+5V output (pins 22, 23, and 25)
The Digital I/O Port provides a +5V output that is used to drive external logic
circuitry. Maximum current output for this line is 600mA. This line is protected by
a self-resetting fuse (one hour recovery time).
GPIB connector
For GPIB communication, connect to GPIB port of computer using an IEEE-488
cable (Keithley Instruments Model 7007).
Ethernet connector (RJ-45)
For Ethernet communication, connect to Ethernet port of a computer, or to a hub
or receptacle of an Ethernet system.
To connect the Series 3700 directly to a computer, use an Ethernet cross-over
cable (RJ-45, male/male).
To connect the Series 3700 to an Ethernet system hub or receptacle, use a
standard Ethernet cable (RJ-45, male/male).
