Woodward MicroNet TMR 5009, Installation/Hardware Manual

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5009 Installation/Hardware Manual 85580V2
72 Woodward
Kernel Power Supply (A1)
Each kernel section of the MicroNet TMR
®
control contains one kernel power
supply module located in the first slot of the kernel. This module receives 24 Vdc
from the main TMR supply and regulates it to 5 Vdc, 10 A for the rest of the
kernel section. The kernel power supply also creates a 5 V precharge voltage.
There are no switches on this module. A Fault LED is on the front panel of the
power supply. It will illuminate if a problem occurs with the 5 V or 5 V precharge.
The kernel power supply module also assists in CPU to CPU communications. If
the control reports a CPU to CPU communication fault, the affected kernel power
supply module may need to be replaced.
WARNING—KERNEL
The MicroNet™ Kernel Power Supplies must have all modules in that kernel
removed before installing or removing a Kernel Power Supply.
With this control, the removal of any single kernel will not cause a
shutdown. However, if other faults are present within other kernels, those
faults combined with any faults created by the removal of this kernel power
supply may cause a system shutdown.
To Replace a Kernel power supply module:
1. If the control is running and on-line, use the system engineering workstation
to verify that the other CPUs are running without faults. Correct all other CPU
faults within the other kernel sections before replacing a kernel’s power
supply.
2. Switch the respective kernel’s CPU Reset switch to its reset position (push
top of switch in).
3. Remove all kernel modules except for the Kernel Power Supply. Unscrew
each module’s captive screw fasteners and release the modules from their
motherboard connectors by pressing their top handles up and their bottom
handles down. To simplify this procedure it is recommended that the
released modules be left within their respective rack slots, with their
respective cables attached.
4. Unscrew the Kernel Power Supply module’s captive-screw fasteners, and
release the module from the motherboard connectors by pressing the top
handles up and the bottom handles down. Remove the module by pulling
straight out and place it into a conductive plastic bag (Woodward P/N
4951-041).
5. Install the replacement supply module by aligning the circuit board edge in
the card guides and push the module into the slots until the connector on the
module and the connector on the motherboard make contact.
6. With even pressure exerted at the top and bottom of the supply’s front panel,
firmly push the supply module into place. Tighten the two screws that secure
the module in place (one at the top and one at the bottom).
7. Re-insert all kernel modules one at a time. With even pressure exerted at the
top and bottom of each module’s front panel, firmly push the module into
place. Tighten the two screws that secure each module in place (one at the
top and one at the bottom).