2920i Two-Card Expansion Board Installation Instructions
Panel Mount Installation (71743)
Use the following procedure to install the two-card
expansion board in the panel mount enclosure. See
Figure 2 for locations of option kit components.
1. Disconnect indicator from power source.
2. Remove housing backplate.
3. Temporarily remove option cards installed on
the CPU board by removing screws from the
bottom edge of the cards.
4. Remove securing screw from CPU board
(adjacent to slot 1 option card header) and set
aside. Replace screw with 1/2" standoff (PN
71452, from the expansion board kit) for
support between CPU board and option card.
(See Figure 2.)
5. Attach 2-inch ribbon cable to connector J7 on
the CPU board.
6. Replace CPU board power supply cable with
the cable in the expansion board option kit.
Connect to power input connector on CPU
board.
7. Re-install option cards in CPU board slots 1
and 2. Install four 3/4" standoffs (PN 98807) in
former screw locations at bottom edge of
option cards.
8. Install 3/4" standoff (PN 98807) on top of
option card in slot 1, threading into 1/2"
standoff installed in Step 4.
9. Install three circuit board supports (PN 71453)
into the remaining holes along the top edges of
the option cards installed in slots 1 and 2.
10. Mount two-card expansion board on circuit
board supports. Install four 1/2" standoffs (PN
71452) along bottom edge of expansion board.
11. Install screw removed in Step 4to secure
expansion board above standoffs installed in
Steps 4and 8.
12. Attach ribbon cable to connector J3 on the
expansion board.
13. Attach power cable to connector J4 on the
expansion board.
14. Set the slot/location jumper to the 3–4 position
(see Figure 1 on page 1).
15. Install option cards onto expansion board (see
page 4).
Figure 2. Two-Card Expansion Board Installed in Panel Mount Enclosure
CIRCUIT BOARD
SUPPORTS(3)
1/2" STANDOFFS
3/4" STANDOFFS
2" RIBBON CABLE
POWER SUPPLY
CABLE
TWO-CARD
EXPANSION BOARD
J3
CPU BOARD
OPTION CARD
(ON CPU BOARD)
J7
(ON CPU BOARD)
(4 ON TOP OF
EXPANSION BOARD)
(4 ON TOP OF CPU BOARD
OPTION CARDS)
REPLACE CPU BOARD SECURING SCREW
WITH 1/2" STANDOFF BETWEEN CPU BOARD AND
SLOT 1 OPTION CARD. INSTALL 3/4" STANDOFF
BETWEEN OPTION CARD AND EXPANSION BOARD.
SECURE STANDOFFSUNDER EXPANSION BOARD
WITH SCREW REMOVED FROM CPU BOARD.
