Keithley 2601 User Manual page 23

Series 2600 System SourceMeter
Model 2635/2636 rear panels
1. CHANNEL A and CHANNEL B (Channel B on Model 2636 only)
Triax connectors for Input/output, guard, and sense connections. Use only low-noise triax cables such
as the Keithley Model 7078-TRX (available in several lengths). Connector terminals and associated
triax cable conductors are as follows:
Table 1-1
Connectors and triax cable conductors
Connector
LO
HI
SENSE HI
Triax cable
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 for connection to the PC (Keithley Instruments Model 7009-5).
7. TSP-Link
Expansion interface that allows a Series 2600 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 Section 17 of the Series 2600 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.
2600S-900-01 Rev. C / January 2008
®
Instruments User's Manual
Center conductor
Sense LO
Input/Output HI
Sense HI
Center conductor
Center conductor
Output Lo
Center conductor
Return to Section Topics
Section 1: Front and Rear Panel Operation
Inner ring Outer ring
Input/Output LO Chassis ground
Guard Chassis ground
Guard Chassis ground
Inner shield Outer shield
Inner ring Outer ring
Floating Chassis Ground
Inner shield Outer shield
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