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10 80kW InfraStruXure PDU—Operation and Configuration
PDU monitoring unit
This connection provides the input power for the PDU monitoring
unit. The power is supplied by the monitoring unit circuit breaker
on the front of the PDU. If the panel is on, and the monitoring unit
circuit breaker is closed, the monitoring unit is powered.
Connects to sensors monitoring values such as voltage, current, and
power.
Digital input sensing for monitoring such as circuit breaker status,
transformer temperature, fans, etc.
The Display port (RJ-45) connects the PDU monitoring unit to the
PDU display interface.
The Power LED indicates wether the monitoring unit is receiving
power from the AC output of the UPS. If the UPS is powered off,
the LED remains lit—the EPO function is still available, however
the monitoring unit is not powered.
Use the Console port (DB-9) to connect a laptop computer to the
monitoring unit using an appropriate communication cable (APC
part number 940-0103). This port is used to configure items
relating to servicing the PDU.
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 powered off. When the
rocker is in the Armed position, engaging the EPO switch will
cause the PDU’s Main Input switch and the Symmetra PX UPS to
be switched OFF. See “Testing the EPO wiring and switches” on
page 60 for more information on testing the EPO switch.
The EPO Armed LED is 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 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 PDU or the PDU monitoring unit.
Connect to the InfraStruXure Manager through the network port.
The To UPS port connects the PDU monitoring unit to the Maintenance Bypass/PCB board and the EPO board
inside the Symmetra PX UPS. This port is connected to wire harnesses secured inside the PDU that are
connected to the Symmetra PX UPS during installation of the system.
The optional User/EPO Contacts port is connected to wire harnesses that connect to the User Connection Plate
in the roof (or floor) of the PDU. The port allows for relay outputs (4), input contacts (4), and an EPO input (1).
See “How to connect contacts to the PDU monitoring unit” on page 20 and “Testing the EPO wiring and
switches” on page 60 for more information.
NO
NC
USER / EPO CONTACTS
TO UPS
DISPLAY
10=GRN
100=ORN
NETWORK
POWER
RS-232
CONSOLE PORT
9600-8-N-1
RESET
TRIPPED
STATUS
LINK RX/TX
ARMED
TEST
EPO
885-2288
12345678910111213
25 24 23 22 2 1 20 19 1 8 17 16 15 14
Note
The branch current monitoring boards connect to the Branch Current Monitor ports (RJ-11). These
ports are on the top side of the PDU monitoring unit, and are labeled on the face of the unit. Each port
corresponds to a section of circuit breakers on the PDU distribution circuit breaker panel:
upper left=[01..41]; upper right=[02..42]; lower left=[43..83]; lower right=[44..84].