Cut Sheet

© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/
Rev: 1-A-062716
Protection Relays
Pump Controls and Liquid Level Controls
www.littelfuse.com/llc6
LLC6 SERIES
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.
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.
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.
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
Wiring Diagram
Low Level Cutoff Liquid Level Controls
Ordering Information
MODEL INPUT VOLTAGE
TIME DELAY
(FIXED)
SENSE
RESISTANCE
RESET
LLC6210F10M 24VAC 10s 10kΩ Manual/Automatic
LLC6410F10M 120VAC 10s 10kΩ Manual/Automatic
LLC643F26M 120VAC 3s 26kΩ Manual/Automatic
LLC6610F5P 230VAC 10s 5kΩ Power Outage Manual Reset
If you don’t find the part you need, call us for a custom product 800-843-8848
L1
N/L2
Metal Tank or use
additional Probe
PC = Probe
Common
P = Probe
V = Voltage
R = Optional NC
Reset Switch
Connect common
to conductive tank.
Additional probe is
necessary for
non-conductive or
insulated tanks.
11-PIN