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Vertiv
™
|
Liebert
®
NX
™
225-600kVA Installation Manual | Rev. 8 | 07/2017
13
Protocols available on the ManageUPS card, depending on the card model, are:
•
Modbus RTU—Modbus Remote Terminal Unit (RTU) communication protocol over RS-232, RS-422 and RS-485
•
Modbus TCP—Modbus Transmission Control Protocol over Internet Protocol (also known as Modbus TCP/IP)
•
SNMP version 1
•
Ethernet
•
HTTP/Web
2.4.2
Slot for LIFE Services Products—XS6
This slot is the reserved interface for LIFE Services modem card. This card provides an independent external
modem interface for communication with LIFE Services service station. Ask your local Vertiv representative for
more details on LIFE Services and its benefits for your UPS system.
2.4.3
Serial Interface for Liebert LIFE Services Cards (Serial Input/Output)—X6
The service interface is a SUB-D nine-pin male connector for RS-232 serial communication. It is used for
communications with external LIFE Services or other special Liebert applications.
2.4.4
Connector for REPO (Input and Status)—XT3/8
This four-pole screw connector allows:
•
Switching off the UPS from a remote source (e.g., push button)
•
Providing status to an external system regarding whether the REPO is active
To perform a remote emergency power off, it is necessary to connect an emergency stop button to the UPS via a
shielded cable not exceeding 66ft. (20m) in length. The switch must be “Closed” under normal operating
conditions and be equipped with a mechanism that maintains it in the “Open” position after it has been pressed.
If this button is not installed, a jumper lead must be connected between Pins 1 and 2. For an indication of REPO
status, connect Pin 3 and Pin 4 to an external system.
Use 16-22AWG cable.
Table 1
REPO connection
Pin
Signal
Explanation
1 & 2
REPO Input Contact
REPO active when open
3 & 4
REPO Status Contact
Open when REPO is active
!
WARNING
The external push button must be voltage free and isolated from all sources and GND. The external REPO
system must not exceed 24V and 20mA.
NOTE
The external EPO switch must latch open when activated.