National Instruments SCB-68 User Manual page 83

Chapter D SCB-68 Circuit Diagrams
SCB-68 Shielded Connector Block User Manual
CJC Not Used
ACH0
S5
(I/O Pin 68)
CJC Used
RSE CJC
or Non-MIO
ACH8
(I/O Pin 34) S4
DIFF CJC
Figure D-2. Cold-Junction Compensation Circuitry
R1
PFI0/TRIG1
(I/O Pin 11)
DGND
(I/O Pin 44)
Figure D-3. Digital Trigger Circuitry
D-2
R22
R4
RC12
+
User Configurable
+5V
Q1
R38
AI
C5
µ
(1 F)
AI
R23
R5
+
RC13
User Configurable
AI
PFI0/TRIG1 Screw Terminal
RC1
DGND Screw Terminal
+5V
ACH0
Screw Terminal
AIGND
C3
(0.1 µF)
+5V
ACH8
Screw Terminal
AIGND
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