LCS-10【PDF 1/1 页】LIQUID LEVEL CONTROL

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Sheet目录625

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Curtis liquid level controls with

Models LCS/LHS

Two sensitivity ranges for

detection up to 3,000,000 ohms

Features

s Low cost Model LCS for Standard Applications up to 100,000 ohms

s High-Sensitivity Model LHS for Special Applications from 100,000 to

3,000,000 ohms

s Solid-State Amplifier with Potentiometer for Signal Sensitivity

Adjustment

s Positive ON/OFF Operation Eliminates Relay Chatter

s Circuit Limits Short Circuit Probe Current to 10MA/24VAC

s Holding Circuit for Differential Levels, or Manual Reset

s Pre-Wired Auxiliary Contactor Available for Handling Heavy Loads

and Motor Ratings Exceeding Capacity of Plug-In Relay

Specifications

Short Circuit Probe Current : 10MA

Model

Input Supply

Control Relay : Plug-in type with dust cover

Input Supply :

LCS-10/LHS-1

LCS-20/LHS-2

LCS-30

120VAC, 50/60 Hz

240VAC, 50/60 Hz

24VAC, 50/60 Hz.

Probe Contacts : Internally Connected for Holding Circuit

Load Contacts : LCS – SPDT, 1/4 HP, 10 amp Non-inductive, 120VAC 1/3 HP at 240 VAC

LHS – SPDT, 1/6 HP, 10 amp Non-inductive, 120VAC 1/3 HP at 240VAC

Maximum Allowable Supply Voltage Variation : ± 10%

Maximum Power Consumption : 3 Watts

Detectable Range : Up to 100,000 ohms (LCS); Up to 3,000,000 ohms (LHS)

Adjustable Range : 1,000 to 100,000 ohms (LCS); 1,000 to 3,000,000 ohms (LHS)

Operating Point Differential : 3% (Typical)

Signal or Probe Voltage : 24VAC

Maximum Signal or Probe Current : 10MA

Outline and Mounting

Auxiliary Contactor : DPST-NO-DB, rated 1 HP at 120VAC, 2 HP at 240VAC

Ambient Operating Temperature : +32° F to +140° F

Standard Termination : Barrier-type terminal blocks accepting wire up to No.

12AWG. Auxiliary contactor has combination screw/double .250” quick-connects

Mounting Style : Flange

Connection Diagrams

Models LCS/LHS is a forward mode control. The control relay is energized when liquid rises to contact the “H” probe. The control

relay is pulled in and remains energized until liquid drops below the “L” probe. Sensitivity is adjustable.

Ordering

Information

Typical Curtis Model Number

Model (Also refer to “Specifications” above)

LCS-20 - -

Contactor (add “C” if desired)

Enclosure – specify only if necessary –

N3-NEMA 3, N3C–NEMA 3/

Contactor, N4 – NEMA 4 JIC

The composite number above reads as an LCS amplifier for 240VAC supply, without enclosure and without contactor.

For further information on catalog listed controls contact your area Curtis representative or Curtis distributor.

For custom design or modification contact your area Curtis representative or the factory direct.

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