Model 2657A High Power System SourceMeter® Instrument Reference Manual
Section 2: General operation
2657A-901-01 Rev. B/December 2012
2-53
Guard voltage can be hazardous. With an unguarded device under test (DUT) connection, terminate
the guard before the end of the cable. Refer to
High-voltage triaxial cable termination
(on page 2-
44) for details.
Connect the enclosure of all metal test fixtures to protective earth (safety ground). See your specific
test fixture for information. Nonconductive test fixtures must be rated to double the maximum
capability of the test equipment in the system.
Figure 16: Three-terminal device connections using two SMUs: Schematic
WARNING
!
SENSE
LO
HI
LO
GUARD
SENSE
HI
LO
3030 VDC
MAX.
250 V
MAX.
Model 2657A
4 ***
6
6
Guard**
Guard**
3
*
Interlock switch shown in OFF / lid open
position
** See
WARNING
*** Additional connections for redundant protective
earth (safety ground) may be required
LO,SL
HI
SH
OUT
IN
2657A-PM-200
!
SMU PROTECTION MODULE
MADE IN
U.S.A.
GUARD
8
5
Model 263xB
10
*
In
MADE IN
U.S.A.
IN
SMU PROTECTION MODULE
4 ***
LO
LO
HI
HI
DUT
1
9
Interlock (pin 24)
To test fixture
Digital ground (pin 19)
Ground symbols
Chassis
Digital
Protective earth
(safety ground)
7
2b
Interlock (pin 24)
To Model 263xB
Digital ground (pin 19)
DIGITAL I/O
1
14
13
25
H
LO,SL
HI
S
OUT
2657A-PM-200
!
GUARD
30 V
MAX.
30 V
MAX.
SL
LO
+5 VDC *
2a
1
13
25
DIGITAL I/O
14
NC
NC
Содержание 2657A
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