Liebert Universal Monitor 用户手册

The Liebert Universal Monitor’s extensive capabilities can put it at the heart of your protective net-

work. The Universal Monitor employs local alarming and remote paging services to keep personnel 

on-site and at remote locations apprised of the status of equipment.
The panel can interface with any device that closes an electrical contact or has a 4-20 mA signal. To 

improve process efficiency and troubleshooting, the panel tracks data in three types of logs: alarm, 

event and trend. The Universal Monitor has a local LCD interface and a remote dial-up interface.
Further, the Universal Monitor can report ambient conditions that might adversely affect the facility 

or equipment and also can report alarms and other events, as well as initiate responses to reduce or 

prevent damage.
When an alarm condition arises, the Universal Monitor displays alarm information and sounds an 

audible alarm; if configured, the panel also sends pager notifications and turns connected devices on 

or off. See 1.11 - Typical Sequence for a more detailed example.

The Universal Monitor features remote access through two interfaces that allow users to configure 

the panel, silence alarms, back up logs, and perform many other functions to keep a large or small 

operation running smoothly and safely.

• LCD—liquid crystal display on the front of the panel
• Service Terminal Interface—accessible via computer connected directly through an RS232 

port or remotely through the Universal Monitor’s onboard modem

These interfaces permit easy access and configuration of the Universal Monitor, allowing users to 

view data, silence alarms and have full access to information stored in the panel, including logs of 

alarms and events.
One more interface—Liebert’s SiteScan Web enterprise monitoring system—is primarily for monitor-

ing, though SiteScan also provides some configuration functions.

The three types of data logs—alarm history, event history and trend data of analog sensor readings—

can be viewed on the LCD on the front of the Universal Monitor and downloaded through onboard 

communications ports.

An optional Expansion Board, which can be purchased separately, allows you to connect an additional 

16 digital inputs and eight digital outputs to the Universal Monitor.
An optional Transformer Module, available only in the large enclosure, converts 115VAC or 230VAC 

to 24VAC.

The alarms available with the Universal Monitor are:

• Discrete input alarm (for each digital input)
• High  setpoint
• Low setpoint
• Battery unplugged
• Low battery
• Loss of power
• Check battery
• Internal modem fault

Two additional alarms are available with the optional Expansion Board:

• Expansion board loss of communications
• Expansion board restore of communications