Rice Lake iRev 920i, Installation Manual, Page: 12 / 101

8
920i
Installation Manual
2.5 Enclosure Reassembly
Once cabling is complete, position the backplate over
the enclosure and reinstall the backplate screws. Use
the torque pattern shown in Figure 2-7 to prevent
distorting the backplate gasket. Torque screws to 15
in-lb (1.7 N-m).
Figure 2-7.
920i
Enclosure Backplate
2.6 CPU Board Removal
If you must remove the
920i
CPU board, use the
following procedure:
1. Disconnect power to the indicator. Remove
backplate as described in Section 2.2 on
page 4.
2. Unplug connectors J9, J10, and J11 (serial
communications), J2 (digital I/O), P1 (power
supply), and connectors to any installed
option cards.
3. Remove any installed option cards.
4. Remove the Þve phillips head screws and two
kep nuts from the CPU board.
5. Gently lift up the CPU board, then disconnect
connectors J12 (power to display), J4 (ribbon
cable, J3 (keypad connector), then the cable
J8 (Port 2 serial port).
6. Remove CPU board from the enclosure. If
necessary, cut cable ties to shift cables out of
the way.
To replace the CPU board, reverse the above
procedure. Be sure to reinstall cable ties to secure all
cables inside the indicator enclosure.
2.7 Fuse Replacement
Fuses for the desktop and universal models of the
920i
are located under a cover plate on the outside of the
enclosure. Remove the cover plate, replace the fuses,
and reinstall the cover plate (see Figures 2-8 and 2-9).
To protect against the risk of fire,
replace fuses only with same type and
rating fuse.
See Section 10.13 on page 96 for complete fuse
speciÞcations.
Interface board and fuse access cover
plates must be in place for use in
NEMA 4X/IP66 applications.
Figure 2-8. Interface Board and Fuse Locations, Desktop
Model
Figure 2-9. Interface Board and Fuse Locations, Universal
Model
1
3
5
14
17
16 12
9
8
7
10
11
18
15
4
2
6
13
To r q u e b a c k p l a t e s c r e w s
t o 1 5 i n - l b ( 1 . 7 N - m )
Caution
Caution
Torque fuse and interface board access covers to
8 in-lb (0.90 N-m)
Fuses
Interface Board
Torque fuse and interface board access covers to
8 in-lb (0.90 N-m)
Fuses Interface Board