•
•
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Switch Positions:
Backplane H I / L O R e f e r e n c e C o n n e c t i o n s
CI
C
l
X
T
h
e
scanned channel input line is connected to
COMMON H I . T h e A N A L O G B U S i s n o t
connected to the scanner channels.
CI
C
2
C
1
T
h
e
scanned channel input line is not connected
to any front edge or backplane pins. G N D is
connected to COMMON H I . T h e backplane is
not connected to the scanner channels.
CI
C
2
C
2
T
h
e
scanned channel input line is not connected
to any front edge or backplane pins. E X T REF
is connected to COMMON HI. T h e backplane is
not connected to the scanner channels.
C2
C
l
C
I
T
h
e
scanned channel input line is connected to
both backplane H and to COMMON HI. G N D is
connected to backplane L.
C2
C
I
C
2
T
h
e
scanned channel input line is connected to
both backplane H and to COMMON HI. R E F is
connected to backplane L.
C2
C
2
C
l
T
h
e
scanned channel input line is connected to
backplane L . G N D i s connected t o b o t h
backplane L and to COMMON HI.
C2
C
2
C
2
T
h
e
scanned channel input line is connected to
backplane L. E X T R E F is connected to both
backplane L and to COMMON HI.
where:
X
T
h
e
connection is valid regardless of the switch position.
Backplane H B a c k p l a n e pin 45, ANALOG BUS H.
Backplane L B a c k p l a n e pin 42, ANALOG BUS L.
GND
F
r
o
n
t
edge pins 23, 24, AA and BB.
EXT REF
F
r
o
n
t
edge pins 21, 22, Y and Z.
COMMON H I F r o n t edge pins 18, V.
334 - 3