American Power Conversion PDU - Manual (Page 26)

Installation Procedures: Connect an Emergency Power Off Switch
18 150kW InfraStruXure System—Installation and Start-Up
Connect an EPO switch to the user connection plate and test the switch
1. Connect the switch to the EPO connection point terminals located on the bottom side of the
PDU user connection plate. Read the label next to the terminal block to determine which
terminals to connect to for the signal type you are using:
– Contact Closure—Normally Open
– Contact Closure—Normally Closed
– 24VAC/VDC—Normally Open
2. Verify that the EPO DIP switches on the PDU monitoring unit are configured properly for the
signal type that you are using. The labels above the switches and the figure below show the
correct settings for both the Normally Open (NO) and Normally Closed (NC) position.
Note
The default setting on the EPO interface on the PDU monitoring unit is for a Normally
Open (NO) switch.
1 2 3 4
AT
S
E
N
AT
S
0
AT
S
1
AT
S
2
EPO
Contact
– +
EPO 24V
AC/DC Contact Inputs Contact Outputs
USER INTERFACE
© 2001 APC
MADE IN USA
External set of
Normally Open Dry Contacts
1 2 3 4
AT
S
E
N
ATS
0
AT
S
1
ATS
2
EPO
Contact
– +
EPO 24V
AC/DC Contact Inputs Contact Outputs
USER INTERFACE
© 2001 APC
MADE IN USA
External set of
Normally Closed Dry Contacts
1 2 3 4
AT
S
E
N
AT
S
0
AT
S
1
AT
S
2
EPO
Contact
– +
EPO 24V
AC/DC Contact Inputs Contact Outputs
USER INTERFACE
© 2001 APC
MADE IN USA
External Set of Normally Open Dry Contacts
24V AC or DC Power Supply
NO
NC
TRIPPED
ARMED
TEST
EP
O
Norma
lly Closed
Normally Open or 24V
AC/DC