APC Automatic Disconnect Switch Specifications Page 74

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Customizing and Updating the ATS: How to Connect an EPO Switch to the ATS
64 Automatic Transfer Switch with Power Distribution
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 ATS
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 ATS monitoring unit are configured properly for the
signal type 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.
1 234
ATS EN
ATS 0
ATS 1
ATS 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
1 234
ATS EN
ATS 0
ATS 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
1 234
ATS EN
ATS 0
ATS 1
ATS 2
EPO
Contact
– +
EPO 24V
AC/DC
Contact Inputs
Contact Outputs
USER INTERFACE
© 2001 APC
MADE IN USA
24V AC or DC Power Supply
E
x
t
erna
l
se
t
o
f
Normally Open Dry Contacts
Location of switches
on ATS monitoring unit
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