Omega LVCN-302 User Manual
™
omega.com
®
®
LVCN-302
Set-Up Manual for Sump Model
®
User’s
MADE IN
Guide
Specifications:
Sensor Input: Isolated input accepts any type of 4-20 mA process signal. Loop power available up to
Input Power: 120VAC/900 mA; 24VDC unregulated/450 mA
Security Levels: 3 levels of access protect data changes with DIP switch on back
Control Circuits: Four Form C relays, 10.0 amp 125VAC (noninductive)
Switching Mode: Selectable, NO or NC states
Output & Input Connections: Terminal Connections are plug in Phoenix type
Programmed Memory: EEPROM - Loss of power will not affect existing programmed data
Mounting Format: Flush mounted anodized steel enclosure with eight (8) 10/32 studs and sealing
Overall Dimensions: Tall: 16.75” (425 mm), Wide: 10.25” (250mm), Deep 2.25” (57mm),
24VDC for 2 wire device
gasket; NEMA 4 graphic front panel; steel back pan housing.
Weight: 4.5 kg (10 lbs.)
LVCN-302 is a solid-state controller with a variety of unique control and display features. It’s designed to
simply present the crucial information, at a glance. It’s built to perform in all types of harsh industrial
environments as well as control alarms, pumps, solenoids, etc.
Topics covered in this manual
Displaying Your Tank’s Cross-Section
Security Levels / Select and Enter Data
Initial Set-Up / Eight Simple Steps
Sensor Connections / Schematics
Sending a 4-20 mA Signal to Other Devices
M3760/1201
LVCN-302 Features and Overview
Let's say your tank is 112 inches deep, and the transducer range of the sensor you’ve
chosen is 0-5 psi of water. 5 psi equals 138 inches H
located 11 inches off the bottom of the tank. With 51 inches of water in the tank you are
cavitating the pump, and at 108 inches of water you are facing probable flooding.
The goal is to maintain the liquid level between 90 and 65 inches using LVCN-302. The
following steps should be taken in order to display a 50 to 110 inch "window" of the tank,
while maintaining a liquid level range of 90 to 65 inches. High and low alarm output circuits
will be activated at 105 and 55 inches.
The
Initial Set-up in Eight Easy Steps
describes in detail how to program LVCN-302 for your
specific application. To accomplish the above
installation, you would enter the following:
Transducer Range 138.0 inches H2O
Transducer Height 11.0
Upper Limit of Window 110.0
Lower Limit of Window 50.0
High Alarm/Fault Level 105.0
Sump ON Level 90.0
Sump OFF Level 65.0
Low Alarm/Fault Level 55.0
2O The pressure transducer is
(see page 4)
Tank Cross-Section Display with LVCN-302
U
pp
er Lim
it of D
isplay W
p
O
N
it of Display W
indow
indow
112”
Pump
110”
110” to 50” the critical
range in the tank you
need to monitor.
50”
11” OFFSET
High Alarm
S
u
m
Actual Liquid Level
Sump OFF
Low Alarm
Low
er Lim
Pressure
Transducer
110
50
95
®
.3
Security Levels / Selecting and Accessing Data
Operator access to data modifications has three modes of security: View Only, Set Point
Changes Allowed and Programming. Each mode is selected from the back of the unit with a DIP
switch setting.
ON
Programming Mode
This mode, #1 ON, allows you to
change all eight programmable
settings. It is used for initial set-up
and installation.
Set Point Changes Allowed
This mode, #2 ON, allows you to
change all four set points: the High &
Low Alarms, Make-up ON & Make-up
OFF.
View Only Mode
This mode, ALL OFF, prevents any
changes from being made. However,
all the information, except the
transducer range and transducer
offset, is available
by pressing SELECT.
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
Output & Input Terminal Connections
(All terminal connections are plug in Phoenix type)
Output
Terminals
Output Terminals
12. High Level N.C.
11. High Level Com
10. High Level N.O.
9. Sump ON N.C.
8. Sump ON Com
7. Sump ON N.O.
6. Low Level N.C.
5. Low Level Com
4. Low Level N.O.
3. Sump ON N.C.
2. Sump ON Com
1. Sump ON N.O.
#1-#3 Sump range
operates at same level
as #7-#9. Condiser it a
spare Form C sump
relay.
120 VAC
Power Supply
Power Supply
3. 120 VAC - Com.
2. Ground
10.0 amp
1. 120 VAC - Hot
10.0 amp
10.0 amp
24 Volt DC
Power Supply
(Unregulated)
10.0 amp
Power Supply
3. 24 VDC - Neg (-)
2. Ground
1. 24 VDC - Pos (+)
Sensor Input
4. 4-20 mA (-)
3. 4-20 mA (+)
2. Ground
1. + 24 VDC Output
NOTE: Terminal #1
provides power for
loop powered sensors.
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