Rice Lake 820i Programmable Indicator/Controller - Installation Manual - Manual (Page 14)

10
820i
Installation Manual
2.5 Slot Assignments
Table 2-4 lists the slot numbers, CPU board connectors, and configuration assignments made for both onboard
and expansion card functions in the 820i . See Figure 2-3 for connector locations.
Table 2-4. 820i Slot Assignments
Slot Number Connector Function Configured As
0 Connector J5 Onboard digital I/O Slot 0, bits 1–8
Connectors J9, J1, J10, J11 Onboard serial communications Ports 1–4
1 Connectors J7, J8 Onboard single- or dual-channel A/D Channel 1, Channel 2
2 Connector J6 (option card slot) Dual-channel serial expansion card Ports 7–8
Digital I/O expansion card Slot 2, bits 1–24
Analog input card Slot 2, channels 1–2
Analog output card Analog 2
Pulse input card Pulse 2
Memory expansion card Memory 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 2-4 to prevent
distorting the backplate gasket. Torque screws to 15
in-lb (1.7 N-m).
1
3
5
14
17
16 12
9
8
7
10
11
18
15
4
2
6
13
T o 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 )
Figure 2-4. 820i Enclosure Backplate
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 820i 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 two
kep nuts from the CPU board.
5. Gently lift up the CPU board, then disconnect
bottom-side connectors for power to display,
ribbon cable, and keypad connector.
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.