Keithley 2601A User Manual page 22

Section 1: Front and Rear Panel Operation
2. DIGITAL I/O
Female DB-25 connector. Fourteen pins for digital input or output, one pin for safety interlock. Use a
cable equipped with a male DB-25 connector (Keithley Instruments part number CA-126-1CA).
3. IEEE-488
Connector for IEEE-488 (GPIB) operation. Use a shielded cable, such as the Model 7007-1 or Model
7007-2.
4. Cooling exhaust vent
Exhaust vent for internal cooling fan. Keep vent free of obstructions to prevent overheating.
5. Chassis ground
Ground screw for connections to chassis ground.
6. RS-232
Female DB-9 connector. For RS-232 operation, use a straight-through (not null modem) DB-9 shielded
cable (Keithley Instruments Model 7009-5) for connection to the PC.
7. TSP-Link
Expansion interface that allows a Series 2600A and other TSP-enabled instruments to trigger and
communicate with each other. Use a category 5e or higher LAN crossover cable (Keithley Instruments
part number CA-180-3A).
8. Power module
Contains the AC line receptacle and power line fuse. The instrument can operate on line voltages of
100V to 240VAC at line frequencies of 50Hz or 60Hz. See the Series 2600A Reference Manual for line
fuse replacement instructions.
9. Ground / LO (Triax connector)
Channel A and Channel B low noise chassis ground triax connectors. Use only low-noise triax cables
such as the Keithley Model 7078-TRX. Connector terminals and associated triax cable connectors are
as follows:
Table 1-2
Triax connector on ground module
Connector
LO
Triax cable
10. Ground / LO (Phoenix connector)
Channel A and Channel B low-noise chassis ground Phoenix connector.
11. LAN
Use this RJ-45 connector to connect the instrument to the local area network. The RJ-45 connector
connects a network card, a network switch, a router or a hub. When connecting directly to a PC, a
crossover cable (included) must be used. When connecting to a network switch, router, or hub, a normal
CAT-5 cable (not provided) should be used unless your equipment has Auto-MDIX capabilities. If it does
have Auto-MDIX, the crossover cables may be used.
1-8
Series 2600A System SourceMeter® Instruments User's Manual
Center conductor Inner ring
Output Lo Floating
Center conductor Inner shield
Return to Section Topics
Outer ring
Chassis ground
Outer shield
2600AS-900-01 Rev. B / September 2008