Liebert Universal Monitor User Manual
Page 13
Introduction
5
K - Digital output loss-
of-power jumper
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.
4.2.3: Setting the Digital Output
9.7.4: Configure Main Board Output
L - Digital input
connectors
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.
4.2.1: Connecting Digital Inputs
M - Digital input status
LEDs
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.
4.3.1: Setting the 12VDC/24VDC
Q - SiteScan Web
connector (EIA422)
Connection to monitor Universal Monitor from Liebert’s
SiteScan Web graphical monitoring package.
R - EIA485 connector
Connection to optional Expansion Board (purchased
separately). Connect maximum of one Expansion Board.
5.3.1: Connect EIA485 Connectors
S - Serial interface
connector (RS232/
EIA574)
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).
A.2: Connecting to the Service
T - Phone line
connector
Connection for phone line. Used for pager notifications,
service phone number, and configuration and monitoring
using the Service Terminal Interface. Requires an RJ11
connector.
9.9.6: Setup Serv Ph Num - Enter
A.2: Connecting to the Service
U - Power receptacle
(Transformer Module)
115VAC power receptacle to power laptop during
configuration and diagnostics. Receptacle not available on
230VAC Transformer Module.
2.4.2: Termination and Mounting -
V - Power On/Off
switch (Transformer
Module)
Power switch to turn power On/Off to both Transformer
Module 24VAC connectors and power receptacle.
2.4.2: Termination and Mounting -
(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.
2.4.2: Termination and Mounting -
X - Modem
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.
2.4.3: Connecting the Battery Pack
Power connection for the controller. Requires 24VAC.
Transformer Module used to convert 115VAC or 230VAC
to 24VAC. Available only in the large enclosure.
2.4.2: Termination and Mounting -
Table 1
Controller board components (continued)
Item
Description
For more information, see: