Emerson Liebert NX 10-30kVA - Manual (Page 46)

Option Installations
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5.5 Battery Start
With this option, the NX UPS can be started with power supplied only by the batteries (at charged
condition). This type of start, in the absence of utility power, allows independent utilization of battery
power and provides for higher availability in some circumstances.
5.6 Remote Alarm Monitor
Status and alarm conditions are available on an optional remote alarm monitor (RAM) panel which is
driven by voltfree alarm status contacts (from an optional relay alarm board).
5.7 Analog Input Interface
At the X6 slot, there are two analog signal channels. Input range is from 0 to +5V, and the precision is
2 percent. “ENV-T” is used for environment temperature detecting.
5.8 Power Output
The X5 slot can provide power for a modem or an external SNMP card. Available voltage is from 9V to
12V. The maximum current is 500mA.
5.9 Intellislot
™
Communication
The NX has three Intellislot ports to allow field-installation of optional communication cards. Intellis-
lot cards communicate via Liebert’s proprietary ESP2 protocol to cards that translate the information
into such protocols as SNMP, IGMnet, Modbus or Jbus. Other cards provide dry contact signals for
external signaling of operating status.
The Intellislot communication ports may be installed or removed while the NX is operating..
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CAUTION
Before attempting to start the UPS without utility power present, ensure that the batteries
are fully charged—over 2.1V per cell—and will supply adequate run time to the load.