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18 InfraStruXure System—Installation and Start-Up
Connect an Emergency Power Off Switch
Overview
Connecting the switch. The Emergency
Power Off (EPO) switch connects to the
PDU user connection plate. The figure on the
right shows the location of the user
connection plate on the roof of the PDU.
Connect a switch using one of three
following connections:
• Contact closure
•24VAC
•24VDC
Configuring and testing. Configuring
and testing of the switch is done through the
EPO interface on the PDU monitoring unit.
The figure to the right shows the PDU
monitoring unit and the location of the EPO
LEDs and switches.
Note
Contact closure is recommended.
Note
APC offers an optional InfraStruXure EPO System (EPW9). Contact your APC sales
representative, or visit the APC Web site (www.apc.com) for more information.
1 234
ATS E N
ATS 0
ATS 1
ATS 2
EPO
Contact
– +
EPO 24 V
AC/D C
Contact Inputs
Contact Outputs
USER INTERFACE
© 2001 APC
MADE IN USA
NO NC
USER / EPO CONTACTSTO UPS
DISPLAY
10=G RN
100=ORN
NETWORK
POWER
RS-232
CONSOLE PORT
9600-8 -N-1
RESET
TRIPPED
STATUS
LINK RX/TX
ARMED
TEST
EPO
885-2288
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25242322 2120 1918 171615 14
NO
NC
TRIPPED
ARMED
TEST
EPO