Liebert Universal Monitor 用户手册

One of eight output jumpers. Each digital output has a 

jumper to set the fail-safe position of the output point when 

power fails. The OFF position makes the contact Normally 

Open (factory default). The ON position makes the contact 

Normally Closed.

Note: The jumper position has no effect on the contact 

when the Universal Monitor has power.

Each of the eight input connections is a two-state point: 

ON/OFF (energized/de-energized).

An example of a field digital input point is a leak detector.

Each input has an LED to indicate its status: ON/OFF 

(energized/de-energized).

Connection for an externally powered analog sensor that 

needs a reference to ground.

Each of the four input connections accepts a 4/20 mA 

signal.

An example of a field analog input point is a temperature 

sensor.

One jumper to select voltage supplied for two-wire analog 

sensors. The jumper supplies all four analog input 

connectors with the same voltage. Factory default is 24VDC.

Connection to monitor Universal Monitor from Liebert’s 

SiteScan Web graphical monitoring package.

Connection to optional Expansion Board (purchased 

separately). Connect maximum of one Expansion Board.

Connection for laptop or video terminal. Used for 

configuration and monitoring using the Service Terminal 

Interface. Requires a null modem cable for connectivity 

(P/N 201258P1).

Connection for phone line. Used for pager notifications, 

service phone number, and configuration and monitoring 

using the Service Terminal Interface. Requires an RJ11 

connector.

U - Power receptacle 

(Transformer Module)

115VAC power receptacle to power laptop during 

configuration and diagnostics. Receptacle not available on 

230VAC Transformer Module. 

switch (Transformer 

Module)

Power switch to turn power On/Off to both Transformer 

Module 24VAC connectors and power receptacle.

W - 24VAC connector 

(Transformer Module)

One of the two 24VAC connectors for power (the second is 

also on the right side of the Transformer Module near the 

top). Each connector is rated for 40VA.

On-board modem with 9600 baud rate.

Indicates the operational status of the modem.

DIP switch used for resetting password to default.

Connection for the LCD on the enclosure door.

N/A

Adjustment contrast for the LCD on the enclosure door.

N/A

Connection for battery pack lead.

Power connection for the controller. Requires 24VAC.

Transformer Module used to convert 115VAC or 230VAC 

to 24VAC. Available only in the large enclosure.

Large Enclosure