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Operation
Model 236/237/238 source measure unit connections
Source measure units are connected to the matrix card using
Model 7078-TRX cables. A Model 237-BAN-3 triax/banana
cable can also be used to connect the output low binding post
on the source measure unit to the matrix. Figure 2-11 shows
connections for remote and local sensing applications.
GUARD
OUTPUT
HI
!
110V
MAX OUTPUT
KEITHLEY
MADE IN
U.S.A.
A. Remote Sensing
GUARD
OUTPUT
HI
!
110V
MAX OUTPUT
KEITHLEY
MADE IN
U.S.A.
B. Local Sensing
Figure 2-11
Model 236/237/238 source measure unit connections
2-16
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LINE RATING
TRIGGER
50-60 Hz
OUT
IN
1
AC ONLY
INTERLOCK
100VA MAX
2
IEEE-488 INTERFACE
OUTPUT
GUARD
SENSE
OUTPUT
ADDRESS ENTERED VIA
SENSE
LO
LINE FUSE
LINE VOLTAGE
HI
LO
LO
FRONT PANEL PROGRAM
CAL
SELECTED
SLOWBLOW
ENABLE
200V
MAX
7078-TRX Triax
237-BAN-3 or Special Triax
LINE RATING
TRIGGER
50-60 Hz
OUT
IN
1
INTERLOCK
AC ONLY
100VA MAX
2
IEEE-488 INTERFACE
OUTPUT
SENSE
GUARD
LINE VOLTAGE
LINE FUSE
ADDRESS ENTERED VIA
SENSE
OUTPUT
LO
LO
FRONT PANEL PROGRAM
HI
LO
SELECTED
SLOWBLOW
CAL
ENABLE
200V
MAX
Caution: The models 237 and 238 Source Measure Units
Models 237 and 238 source measure
units can only be used within the speci-
fied maximum signal levels of the Model
7174A (200V, 2A).
KEITHLEY
8 x 12 LOW
CURRENT MATRIX
SIGNAL
200V PK
200V PK
GUARD
200V PK
7078-TRX Triax
ROWS
A
7078-TRX Triax
B
7078-TRX Triax
C
D
E
F
G
H
WARNING:
TIGHTEN MOUNTING SCREWS
TO ENSURE PROPER
CHASSIS GROUND
7174A Matrix Card
KEITHLEY
8 x 12 LOW
CURRENT MATRIX
SIGNAL
200V PK
200V PK
GUARD
200V PK
ROWS
A
B
C
D
E
F
G
H
WARNING:
TIGHTEN MOUNTING SCREWS
TO ENSURE PROPER
CHASSIS GROUND
7174A Matrix Card
can only be used within the specified maximum
signal levels of the Model 7174A (200V, 2A carry).
CAUTION
7174A
COLUMNS
1
2
3
4
5
6
7
8
9
10
11
12
!
7174A
COLUMNS
1
2
3
4
5
6
7
8
9
10
11
12
!
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