Unit Emergency Power Off (Uepo) - IBM zEnterprise EC12 Installation Manual

Unit emergency power off (UEPO)

There is a unit emergency power off (UEPO) switch on the front of the primary frame (A frame) of each
system. When tripped, the UEPO switch will immediately disconnect utility and battery power from the
machine functional unit. Utility power is confined to the machine power compartment. All volatile data
will be lost.
Front View
Unit EPO Panel
Unit EPO Panel
Mounting Screw
Unit EPO
Switch
Unit EPO Panel
Mounting Screw
BYPASS
Room Disconnecting Means/
Emergency Power Off Actuator
Figure 14. UEPO panels
Figure 14 illustrates both the front and the rear of the machine UEPO panel. The rear view shows where
the room electrical power disconnecting means, or room Emergency Power Off, EPO, cable plugs into the
machine. Notice the switch actuator. Once moved to make the cable connection possible, the room
disconnecting means / EPO cable must be installed for the machine to power on.
ACTIVE
ACTIVE
Room Disconnecting Means/
Emergency Power Off Actuator
Rear View
Unit EPO Panel
A Side
BPI
Cable
J01
B Side
BPI
Cable
J02
Customer
Supplied
Cable
J03
BYPASS
Chapter 5. Power requirements
Level 01f
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