American Power Conversion 250 A - Manual (Page 27)

ATS Component Details
InfraStruXure Power Generation System 17
ATS monitoring unit
 This port connects to the Source 2 volt-sensing circuit
board, the Source 1 volt-sensing circuit board, the
Source 1 current transformers, and the distribution
panel volt-sensing circuit board.
 This port connects to the ATS interface circuit board.
 The display port (RJ-45) connects the monitoring unit
to the display interface.
 The power LED indicates whether the monitoring unit
is receiving power.
 The console port (DB-9) is used to configure items
relating to servicing and for communication with the
generator (see item 4 on page page 13).
NOTE: A laptop computer can be connected to this
port for configurations.
 The EPO DIP switches configure the EPO input for
the type of EPO switch that is connected: Normally
Open (NO) or Normally Closed (NC).
 When the EPO Arm/Test rocker is in the Test
position, engaging the EPO switch will not cause the
load to be shut down. When the rocker is in the Armed
position, engaging the EPO switch turns OFF the ATS
Source 1 and Source 2 switches and engages the
generator’s emergency stop button. When the EPO
switch is engaged, the Not in Automatic LED on the
ATS is lit (see page 64 for more information about
testing the EPO switch).
 The EPO Armed LED is lit green when the rocker is in the Armed position. The LED is dark when
the rocker is in the Test position.
 The EPO Tripped LED is lit red when the EPO switch is engaged (the EPO button is pressed),
regardless of the state of the EPO Arm/Test rocker.
 The reset button resets the network processor; it does not reset the ATS or the monitoring unit.
 The network port connects to the surge-protected ethernet port on the user connection plate (see
page 16 for more information about the surge-protected ethernet port).
 This port connects to the ATS interface circuit board.
 The optional User/EPO Contacts port is connected to the user interface board on the user connection
plate attached to the roof of the ATS. This port supports relay outputs (4), input contacts (4), and one
EPO input (see page 16 for more information).
NO
NC
DI
S
P
L
A
Y
10
=
G
R
N
10
0=
O
R
N
NE
T
W
O
R
K
PO
W
E
R
R
S-
232
CO
N
S
O
LE
P
O
R
T
960
0-
8-
N
-1
RE
SE
T
T R IPP E D
STA T U S
LIN K R X /T X
A R M E D
T E ST
EPO
8 8 5- 22 8 8
1
2
3
4
5
6
7
8
9
10
11
12
13
25
24
23
22
2 1
20
19
1 8
17
16
15
14
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













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