Rice Lake 720i Programmable Indicator/Controller - Installation Manual - Manual (Page 16)

10 720i Installation Manual
2.5 Slot Assignments
Table 2-5 lists the slot numbers, CPU board connectors, and configuration assignments made for both onboard and
expansion card functions in the
720i . See Figure 2-3 for connector locations.
Table 2-5. 720i Slot Assignments
Slot Number Connector Function Configured As
0 Connector J6 Onboard digital I/O Slot 0, bits 1–8
Connectors J3, J2, J5 Onboard serial communications Ports 1, 2, 4
1 Connector J1 Onboard single-channel A/D Channel 1
2 Connectors J12 (expansion card
slot) and J11(communications
option card slot) Dual-channel serial expansion card Ports 7–8
Digital I/O expansion card Slot 2, bits 1–24
Analog output card Analog 2
Bus communications cards Bus Option 2
2.6 Enclosure Reassembly
Once cabling is complete, position the backplate over
the enclosure and reinstall the backplate screws. Use
the torque pattern shown in Figure 2-5 to prevent
distorting the backplate gasket. Torque screws to 15
in-lb (1.7 N-m).
5PSRVFCBDLQMBUFTDSFXT
UPJOMC /N
Figure 2-5. 720i Enclosure Backplate
Important
Torqued screws may become less tight as
the gasket is compressed during torque
pattern, therefore a second torque is
required using the same pattern and
torque value.
2.7 CPU Board Removal
If you must remove the 720i CPU board, use the
following procedure:
1. Disconnect power to the indicator. Remove
backplate as described in Section 2.2 on
page 6.
2. Unplug connectors for power to the board,
serial communications, digital I/O, and any
installed option cards.
3. Remove any installed option cards.
4. Remove the five phillips head screws and the
kep nut from the CPU board.
5. Remove CPU board from the enclosure. If
necessary, cut cable ties to shift cables out of
the way.
To r e p l a c e t h e C P U b o a r d , r e v e r s e t h e a b o v e
procedure. Be sure to reinstall cable ties to secure all
cables inside the indicator enclosure.