Protection Relays
Pump Controls and Liquid Level Controls
LLC6 SERIES
Low Level Cutoff Liquid Level Controls
Description
The LLC6 Series is a plug-in, single-probe conductive liquid
level control designed for low liquid level cutoff protection. It
offers a factory fixed time delay of 1 - 60s and is available in
input voltages of 24, 120, or 230VAC. LED indicator illuminates
whenever the LLC6’s 10A, SPDT output relay is energized.
Available with automatic/manual reset or a special manual reset
with power outage feature, which auto resets the unit when
power is restored and the water level is acceptable. 24VAC and
120VAC units are recognized as limit switches under UL353
(230VAC units are UL508) and CSA certified under Standard 14.
11-PIN
Operation
Automatic Reset (Reset terminals not connected): When
liquid rises to the low level cutoff probe, the output relay and
the LED indicator energize. When the liquid falls below low level
cutoff probe, the output relay and the LED indicator de-energize
after a fixed time delay.
Manual Reset (Reset switch connected): When the liquid
level falls below the low level probe, the output relay and LED
de-energize after a fixed time delay. When the liquid level rises
to the low level probe, the output relay and LED indicator remain
de-energized until the manual reset switch is opened; then they
energize immediately.
Wiring Diagram
PC = Probe
Common
P = Probe
V = Voltage
R = Optional NC
Reset Switch
Power Outage Manual Reset (Reset switch connected): A
power outage causes the output relay and LED indicator to
de-energize. Upon restoration of power, if the liquid level is
above the low level probe, the output relay and LED indicator
will re-energize. If the liquid level is below the low level probe,
the output relay and LED indicator remain de-energized until the
Normally Closed (NC) reset switch is opened.
N/L2
L1
Connect common
to conductive tank.
Additional probe is
necessary for
Metal Tank or use
additional Probe
non-conductive or
insulated tanks.
Features & Benefits
FEATURES
BENEFITS
Isolated 12VAC on probe Prevents electrolysis
Industry standard 11-pin
octal plug connection
Eliminates need for special connectors
LED indication
Visual indication output relay is energized
Power outage protection
(see ordering table
for models)
Automatically resets the unit when power is
restored and the water level is acceptable
Ordering Information
TIME DELAY
(FIXED)
SENSE
RESISTANCE
MODEL
INPUT VOLTAGE
RESET
LLC6210F10M
LLC6410F10M
LLC643F26M
LLC6610F5P
24VAC
10s
10s
3s
10kΩ
Manual/Automatic
120VAC
120VAC
230VAC
10kΩ
Manual/Automatic
26kΩ
Manual/Automatic
10s
5kΩ
Power Outage Manual Reset
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/llc6
Rev: 1-A-062716