User manual

Introduction
Liebert
®
Liqui-tect
®
4
1.4 Controller Board Overview
The Liebert Liqui-tect panel’s controller board, as shown below, has connectors for two digital outputs
for leak detection alarms, two digital outputs for cable break alarms, two inputs for leak detection
cables and two analog outputs for connecting to a building management system. The board comes
complete with light-emitting diodes (LEDs) to display the status of monitored zones, power
connections and other features necessary to monitor and protect your operation.
ON
TB3
C28
R16
R17
R18
DS3
DS4
DS5
K1
K2
K4
K5
TX RX
A
1
SW2 SW1
R4
O N
23456 78
1
O N
2
R1
R40
R44
DS7 DS8
R38
C26
C27
C40
C33
U15
U23
C32
U22
C46
U29
U24
U24
U16
DS1
Pwr On
24V Pow
LCD Interlface
345678
FaultLEDO
DS6
Reset
A-Power On/Off
LED
B-DIP
switch 1
C-DIP
switch 2
D-Audible
horn
E-Digital alarm
outputs (Zone 1)
F-Alarm output
LEDs (Zones 1&2)
G-Digital alarm
outputs (Zone 2)
H-Status LEDs
M-RS232
LEDs
I-4/20mA output
(Zone 2)
J-4/20mA output
(Zone 1)
K-Input cable
connector (Zone 2)
L-Input cable
connector (Zone 1)
N-RS232
connector
O-Liebert SiteScan
®
Web connector
P-Liebert
SiteScan
Web LEDs
Q-RS485
LEDs
R-RS485
connector
(not used)
V-LCD
connector
W-LCD contrast
adjustment
X-Reset
switch
Y-24VAC power
connector
Z-Transformer
Module
S-Power
receptacle
T-Power On/
Off switch
U-24VAC
connector