© 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