1269 User Manual
Configuring The 1269 2-21
EMS Units
The 1269 mainframes equipped with the EMS monitoring option
have no manual fan switch. The fan speed is controlled by the
EMS module. However the user may select the fan speed
range (HI or LO). The 1269 is shipped with the fan speed range
configured to the
HI
setting for rack mount configurations, and to
the
LO
setting for bench top configurations. If your application
requires more cooling or lower acoustic noise levels you may re-
configure the fan speed range as described below, and in
Figure 2-14 Fan Speed (HI -LO) Selection- EMS.
WARNING
Ensure that J400 AC Input is disconnected before
removing or replacing the System Monitoring (EMS)
module. Possible damage to the module could
result.
1.
Remove EMS module. See Removal and Replacement
in
Chapter 7
.
2.
Position the jumper at J14 between pins 1-2 for the
LO
setting, or between pins 2-3 for the
HI
setting.
3.
Replace the EMS module. See Removal and
Replacement in
Chapter 7
.
Figure 2-14 Fan Speed (HI-LO) Selection – EMS
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