Model CA-558
Model CA-558
3-Pin Interlock Connector Cable
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
The Model CA-558 is a 25-pin male D-sub to 3-pin female interlock cable assembly.
Figure 1: Model CA-558
The Model CA-558 cable connects the safety interlock circuit of a Series 26xxA SourceMeter to the safety interlock
switch of the Model 8010 High Power Device Test Fixture that contains the device under test. To use the cable,
plug one end of the cable into the interlock connector on the test fixture, and connect the other end of the cable into
the INTERLOCK connector on the rear panel of the instrument.
You can order the cable in three different lengths (see table below).
Model number
Cable length
3.28 ft (1.0 m)
6.56 ft (2.0 m)
9.84 ft (3.0 m)
This interlock cable can be used with the Models 2601A, 2602A, 2611A, 2612A, 2635A, 2636A, 2651A, and 2657A
PA-1044 Rev. A / December 2011
Model CA-558
Electrical characteristics
Working voltage: 32 V DC
Connector pin identification:
25-pin D-sub connector*
3 pin connector
Pin 22: Red (+ 5 V) connected to
Pin 1
Pin 24: Green (interlock) connected to
Pin 2
Pin 20: Black (ground) connected to
Pin 3
* Pins 1-19, 21, 23, and 25 are not connected.
PA-1044 Rev. A / December 2011
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