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Liebert NX
Position
Name
J10.1
EPO_NC
J10.2
+12V
J10.3
+12V
J10.4
EPO_NO
EPO is triggered when pins 3 and 4 of J10 are shorted or pins 2 and 1 of J10 are opened.
If an external EPO facility is required, pins 1 and 2 or 3 and 4 of J10 are reserved for this function. The external EPO facility is also
connected to the normally open or normally closed remote stop switch between these two terminals using a shielded cable. If this
function is not used, pins 3 and 4 of J10 must be opened and pins 1 and 2 of J10 must be shorted.
1. When activated, the UPS EPO shuts down the rectifiers, inverters and static bypass, but does not disconnect the input power supply
internally. To disconnect all power to the UPS, open the upstream input breakers and the battery circuit breaker when the EPO is
activated.
2. Pins 1 and 2 of J10 are supplied factory-shorted.
1.8.6 RS485 Port, RS232 Port, and IntelliSlot Port
The RS485 and RS232 ports provide serial data and are intended for use by authorized commissioning and service personnel during
UPS commissioning and service activities.
IntelliSlot ports 1 to 3 support the following communication cards:
1. IS-WEBL, IS-485L, IS-485EXI, IS-RELAY
These cards communicate with the UPS via the Liebert Velocity protocol and with the external network using the industry standard
protocol.
1. IntelliSlot port 1 shares communication resources with the RS232 port for service programming and, to avoid conflict, should
preferably be used for cards other than the dry contact card.
2. For card installation and setting procedures, refer to the user manuals for the cards.
1.8.7 NX IntelliSlot Communication
The NX has three Liebert IntelliSlot ports that allow field-installation of optional communication cards. Liebert IntelliSlot cards
communicate via the proprietary Velocity protocol with cards that translate the information into protocols such as SNMP and
Modbus. Make sure Velocity protocol is selected in the Protocol Settings menu of the LCD control panel.
Other cards provide dry contact signals for external operating status signals.
The NX IntelliSlot communication ports may be installed or removed while the NX is operating.
1.8.8 IntelliSlot Web Card – SNMP/HTTP Network Interface Card (IS-WEBL)
This network interface card provides all real-time data and status information as SNMP traps for connection to a 10/100-baseT
Ethernet connection. This card will also transmit the same status information and all measured parameters for display via a web
browser.
1.8.9 IntelliSlot 485 Interface Card (IS-485L)
The IntelliSlot 485 card provides Building Management System monitoring and control of your UPS. The card delivers the Modbus
protocol via its RS-485 port. This makes it possible to integrate the UPS into existing Building Management Systems that support
the open protocol standard of RTU Modbus.
20
Table 1-7 Description of Remote EPO Input Port
EPO activated if opened to J10.2
EPO activated if opened to J10.1
EPO activated if shorted to J10.4
EPO activated if shorted to J10.3
Note
Note
Installing the UPS Module
Description
User Manual 10H52192UM60 - Rev. 1 - 09/2011
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