Specifications

Hardware Description of Coprocessor
4.5 WSI2 I/O Board replacement
3/96 Application Module
X
Service 43
Honeywell Inc.
4.5 WSI2 I/O Board replacement
Overview Node power must be turned off for the purpose of changing circuit boards
in the A
X
M node.
Locating
shutdown
procedure
Software shutdown procedures for both the A
X
M coprocessor and node
processor are documented in the Application Module
X
System
Administration manual.
WSI2 I/O board
Replacement
Procedure
W
W
A
A
R
R
N
N
I
I
N
N
G
G
Damage Can Result—Circuit board damage can result if
you do not practice proper ESD procedures or attempt to
remove/insert a circuit board with node power applied.
CAUTION
Mandatory Steps—It is mandatory that appropriate software
shutdown procedures are followed for the A
X
M coprocessor
prior to removing power from the A
X
M node.
Failure to do so can cause damage to the HP-UX file
structure on the coprocessor hard disk.
ATTENTION
It is also highly recommended that you perform a node
processor software shutdown when preparing to power off
the A
X
M node. This provides for an orderly departure from the
LCN network.
Table 4-4 WSI2 I/O Board Replacement Procedure
Step Action
1 Turn off the power using the switch on the node
power supply.
2 Disconnect the cables from the WSI2 I/O board. Pay
attention to the marking on the cables. These cables
must be returned to their appropriate positions after
installing the new board.
3 Remove the board using the two screws which
secure the faceplate to the chassis. (Extraction/
insertion levers may exist in place of screws for early
production units.)