Unit Emergency Power Off (Uepo) - IBM Z10 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.
Unit EPO Panel
Mounting Screw
Unit EPO Panel
Mounting Screw
This figure illustrates the back of the machine UEPO panel showing 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.
44
z10 BC IMPP
Front View
Unit EPO Panel
Unit EPO
Switch
BYPASS
Room Disconnecting Means/
Emergency Power Off Actuator
ACTIVE ACTIVE
Emergency Power Off Actuator
Level 03c, May 2011
Rear View
Unit EPO Panel
A Side
BPI
Cable
J01
B Side
BPI
Cable
J02
Customer
Supplied
Cable
J03
BYPASS
Room Disconnecting Means/