Description

The LLC4 combines resistance sensing circuitry with solid-state

timing to provide single probe level maintenance. On adjustable

units, the sensitivity adjustment allows accurate level sensing

while ignoring foaming agents and floating debris. Isolated

12VAC is provided at the probe to prevent electrolysis. A trickle

current of less than 1mA determines the presence or absence

of conductive liquid between the probe and common. The LLC4

Series can be used with many types of low voltage (resistance

changing) transducers to perform other control functions like

temperature limit control, photo limit control, condensation

sensing, and ice sensing.

Operation

Drain (Pump-Down Mode): When the liquid level rises and

touches the probe, the time delay begins. This time delay

prevents rapid cycling of the output relay and its load. At the

end of the time delay, the output relay energize and remain

energized until the liquid level falls below the probe level. The

output relay de-energize and remain de-energized until the liquid

rises and touches the probe.

Fill (Pump-Up Mode): When the liquid level falls below the

probe, the time delay begins. This time delay prevents rapid

cycling of the output relay and its load. At the end of the time

delay, the output relay energize and remain energized until the

liquid level rises and touches the probe. The output relay then

de-energize and remain de-energized until the liquid level again

falls below the probe level.

FEATURES BENEFITS

Isolated 12VAC probes Prevents scale buildup on probe

Industry standard 8-pin

octal plug connection Eliminates need for special connectors

Sensitivity adjustment Provides accurate level sensing while ignoring foam

or floating debris

LLC44A4A屬于工業(yè)自動(dòng)化與控制 > 控制器 - 液體，液位。力特公司制造生產(chǎn)的LLC44A4A控制器 - 液體，液位工業(yè)液位控制器用于監(jiān)控恒定液位、高液位或低液位，以及泄漏檢測(cè)類型的感應(yīng)。其他特性可能包括可調(diào)節(jié)的靈敏度、內(nèi)置定時(shí)器、LED 指示、過(guò)濾器報(bào)警和自動(dòng)關(guān)閉閥門。一旦檢測(cè)到 DPDT、DPST、SPDT 和 SPST 功能的觸頭外形變化，固態(tài)或機(jī)械觸頭便會(huì)致動(dòng)。