2-7
2
System Description
System Parts Identification
Figure 2-7. I/O Backplane Board
LEGEND
Item
Description
Item
Description
1
J1 connects to J4 on Comm Backplane
board (see permissible Modules in the
diagram below)
3
4 - J3 connectors for USM, I/O, MDIM or LVDIM-
Modules (see permissible Modules in the diagram
below)
2
J2 connects to J1 Expansion board
(Expansion board is optional)
11
11
GG B
B FF
11
TO COMM I/O BACKPLANE
SPARE
+24V
(-)
GND
GND
+24V
(+)
EXT_RESET
SNAP
EXT_RESET
+24V
SLOT 1
GND
GND
(-)
(+)
SCREW
GND
SLOT 2
1
SNAP
SNAP
I/O BACKPLANE
332616-001
332616-002
JJL012907
SLOT 3
1
SLOT 4
SNAP
EXT_
GND
GND
+24V
+24V
(+)
(-)
RESET
SPARE
SCREW
TO EXPANSION
1
3
2
consoles\450\918-7.eps
1
2
3
4
W
ARNING - HIGH
VOLTAGE UNDER
THIS COVER
Power connector
cover plate
(shown removed)
1 2 3
3
2
1
4
4 5
L1
G
N/L2
Comm module clamp
securing screw
Slots 1-4 Any combination of USM, I/O,
MDIM or LVDIM Modules
Comm Bay
Module Bay
AC power
input connector
Overfill alarm
relay connector
120/240 Vac,
2A maximum
120/240 Vac,
50/60 Hz,
2A maximum
12
C