Dwyer LLC User Manual
LLC Series Conductivity Controller
Installation and Operation Bulletin
This bulletin should be used by experienced personnel as a guide to the installation of series LLC controls. Selection or
installation of equipment should always be accompanied by competent technical assistance. We encourage you to
contact Dwyer or its representative if further information is required.
Specifications
Control Design: Solid state components enclosed in clear
Lexan plug-in style housing. Housing carries no NEMA
rating.
Contact Design: SPDT (1 form C): one normally open (N.O.)
and one normally closed (N.C.), non-powered contacts.
Contact Ratings: 10A @ 120 or 240 VAC resistive, 1/3 H.P.
@120 or 240 VAC.
Contact Life: Mechanical- 5 million operations. Electrical100,000 operations minimum at rated load.
Supply Voltage: 24, 120, or 240 VAC models- factory set.
Plus 10%, minus 15%, 50/60 Hz.
Supply Current: 120, 240, 24 VAC, Relay energized 4.4 VA.
Secondary Circuit: 12 VAC RMS voltage on probes, 1.5
milli-amp current.
Sensitivity: Models operate from 0-1,000,000 OHM
maximum specific resistance- factory set.
Temperature: -40 to 150° F. ambient.
Terminals: All connections #6-32 screw type with pressure
clamps.
Time Delays: Standard, 0.5 seconds on rising level. Additional time delays on rising and/or falling available as option.
Installation
1. Install octal socket in appropriate enclosure
using two (2) #6 or #8 metal screws.
1A. Install rail mount socket on appropriate rail
(DIN mount) in appropriate enclosure if
applicable.
2. Wire control per wiring diagram, following N.E.C.
and local codes
3. Install control module in socket.
Sensitivities vs Maximum
Probe Wire Distance*
Sensitivity
Character
A or K
B or L
C or M
D or N
E or P
F or R
G or S
Sensitivity
(K Ohms)
4.7
10
26
50
100
470
1,000
Distance
(Ft)
10,000
5,700
2,200
1,075
570
270
38
3-1/2”
2-3/4”
5/8”
*
Based on type MTW or THHN wire, #14 or #16 Awg.
Dimensional Diagram
2-3/8”
2-5/16”
1-5/32”
2.0”
1-11/16”
Use copper (60/70° C) wire only. Torque to 20 inch pounds.
11/64”
Dia.
Operation
Wiring Diagram
Direct Mode- Single Level Service: When the
liquid rises to the electrode on terminal 3, the
control energizes, changing state of the load
contacts. (LED will be lit) The control remains
energized until the liquid level recedes below
electrode on terminal 3. The control then deenergizes, (LED will not be lit) returning load
to original state.
Inverse Mode- Single Level Service: Control energizes with power, changing state of
the load contacts. (LED will be lit) When the
liquid rises to the electrode on terminal 3, the
control de-energizes, returning the load contacts to shelf state. (LED will not be lit) The
control remains de-energized until liquid level
recedes below the electrode connected to terminal 3. The control then energizes.
Direct Mode- Differential Service: When the
liquid rises to the electrode on terminal 3, the
control energizes, changing state of the load
contacts. (LED will be lit) The control remains
energized until the liquid level recedes below
electrode on terminal 4. The control then deenergizes, (LED will not be lit) returning the
load contacts to original state.
Inverse Mode- Differential Service: Control
energizes with power, (LED will be lit) changing state of the load contacts. When the liquid
rises to the electrode on terminal 3, the control de-energizes, returning load contacts to
shelf state. (LED will not be lit) The control
remains de-energized until the liquid level recedes below the electrode on terminal 4. The
control then energizes.
AC Supply
L1
1
L2
2
3
4
H
L
- For Differential Service
- For Single Level Service use “H” and “G” Connections
C
8
NC
7
6
5
NO
G
Reference Probe
Low Probe
High Probe
If Metallic, tank may be used
Instead of reference probe.
Optional
Time Delays: With time delay on increasing level, the liquid must be
in contact with the short electrode for the full duration of the time
delay before control will operate. With delay on decreasing level,
the liquid must be below long electrode for the full duration of the
time delay before control will operate. In single level service, terminals 3 and 4 must be jumpered together to achieve time delays on
both increasing and decreasing levels or just decreasing level.
LLC X X X X
Enclosure: Blank = None; 1 = Nema1; 4 = Nema4
Socket: 5 = Din Mount; 8 = 8 Pin Octal
Operation: 1 = Direct 10K; 2 = Direct 26K; 3 = Direct 50K; 4 = Direct 100K
Supply: 1 = 110 VAC; 2 = 240 VAC; 3 = 24 V AC
DWYER INSTRUMENTS,INC.
P .O.BOX 373 MICHIGAN CITY, INDIANA 46361, U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: in fo@dwyer-inst.co m
Lit-By Fax: 888/891-4963
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