Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
Specifications are subject to change without notice.
Page 6 of 7 SPEC-2601_2602 Rev. D / January 2008
Models 2601/2602
System SourceMeter
®
Specifications
4. GENERAL
Host Interfaces: Computer control interfaces.
IEEE-488: IEEE-488.1 compliant. Supports IEEE-488.2 common commands and status model topology.
RS-232: Baud rates from 300 bps to 115200 bps. Programmable number of data bits, parity type, and flow control
(RTS/CTS hardware or none). When not programmed as the active host interface, the SourceMeter can use the
RS-232 interface to control other instrumentation.
Expansion interface: The TSP-Link expansion interface allows TSP-enabled instruments to trigger and
communicate with each other.
Cable type: Category 5e or higher LAN crossover cable.
Length: 3 meters maximum between each TSP-enabled instrument.
Digital I/O interface:
Connector: 25-pin female D.
Input/Output pins: 14 open drain I/O bits.
Absolute maximum input voltage: 5.25V.
Absolute minimum input voltage: –0.25V.
Maximum logic low input voltage: 0.7V, +850ȝA max.
Minimum logic high input voltage: 2.1V, +570ȝA.
Maximum source current (flowing out of digital I/O bit): +960ȝA.
Maximum sink current at maximum logic low voltage (0.7V): –5.0mA.
Absolute maximum sink current (flowing into digital I/O pin): –11mA.
5V power supply pin: Limited to 600mA, solid state fuse protected.
+5VDC
5.1kΩ
100Ω
600mA
Solid State
Fuse
Read by
firmware
Written by
firmware
+5V Pin
(on DIGITAL I/O
connector)
Digital I/O Pin
(on DIGITAL I/O
connector)
GND Pin
(on DIGITAL I/O
connector)
Rear Panel
Output enable pin: Active high input pulled down internally to ground with 10k resistor. When the Output
Enable input function has been activated, each SourceMeter channel will not turn on unless the output enable pin
is driven to >2.1V (nominal current = 2.1V / 10k = 210ȝA).
Power Supply: 100V to 250VAC, 50Hz–60Hz (auto sensing), 250VA max.
Cooling: Forced air. Side intake and rear exhaust. One side must be unobstructed when rack-mounted.
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