Keithley SourceMeter 2790 Reference Manual page 89

2-32
Figure 2-12
Model 7751/7752/7753 simplified schematic
Bank 1
J101
Bank 2
J102
Bank 3
J103
Bank 4
J104
Vsource
+
Ch. 28
50-500V
–
(7751/7753
Only)
Ch. 24
Isource
0-50mA
Ch. 27
Source
HI Ch. 1
Sense
Source
LO Ch. 2
Sense
A1
Ch. 3
B1
Source
HI Ch. 4
Sense
Source
LO Ch. 5
Sense
A2
Ch. 6
B2
Source
HI Ch. 7
Sense
Source
LO Ch. 8
Sense
A3
Ch. 9
B3
Source
HI Ch. 10
Sense
Source
LO Ch. 11
Sense
A4
Ch. 12
B4
20mV
Dry
Ch. 22 Ch. 21
Ckt
Ch. 22 Open: I-source Select
Ch. 22 Close: V-source Select
Model 2790 SourceMeter
Ch. 25
Ch. 13
Ch. 14
Ch. 15
Ch. 16
Ch. 17
Ch. 23
1Ω
Ch. 20
®
Switch System Reference Manual
HI
Ch. 18 Input
LO
HI
Ch. 19 Sense
LO
Source Enable
Interlock
+5V
+5V
Interlock
10kΩ
Guard
Guard
Source HI
Source LO
Sense HI
Sense LO
I/V IN
I/V OUT
I/V LO
Vsrc HI
Vsrc LO
Isrc HI
Isrc LO
Guard
10kΩ
Guard
200kΩ (7751)
20kΩ (7753)
I/V
–
Current/Voltage
Amplifier
+
(7751/7753 Only)
Cable Discharge
100kΩ
(7751/7753 Only)
To Model
2790
Backplane
J106
J105
J108
J107