3: Rear Panel Series 3700 System Switch/Multimeter
-4 Document Number: 3700S-900-
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).
USB connectors
The downstream USB-2.0 receptacle (Type B) located on the rear panel connects to a host. The
front panel has an upstream USB-2.0 connector (Type A) that connects to a user supplied USB
flash drive.
Use the rear connector to communicate with the instrument over USB by sending the desired
commands. Use the front panel connector to insert a USB flash drive for saving or loading
reading buffers, user setups, or scripts. See the Reference Manual for more information on
reading buffers, user setups and scripts.