Dwyer Instruments Proximity PLS2 Istruzioni per l'installazione e il funzionamento

The Series PLS2 is an electromechanical level switch designed for level

monitoring of bulk materials. The rotating measuring vane is driven by a

brushless synchronous motor at one revolution per minute. As product

builds up the paddle rotation is impeded and the resulting motor torque

activates the output switch and stops the motor. A spring mechanism

reactivates the motor and returns the switch to normal state when the

material no longer impedes the paddle rotation. A torque adjusting

mechanism eliminates the need for different sized paddles. The PLS2 is

designed with the industry standard 1-1/4˝ male PT connection and unit

can be side or top mounted.

FEATU ES

• 3 sensitivity settings

• Top or side mountable

• Brushless synchronous motor: Assures long term reliability and

efficiency

• Motor shuts off when paddle stalls

• Screw cover: For easy access with no worries about losing bolts or

screws

TECHNICAL DATA

Model PLS2 Paddle Level Switch

Specifications - Installation and Operating Instructions

Bulletin L-PLS2

DWYE INST UMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

SPECIFICATIONS

Service: Dry powder or bulk materials compatible with wetted

materials.

Wetted Materials:

Paddle: 304 SS;

Exposed shaft: 303 SS;

Shaft seal: BR;

Process connection: Aluminum.

Temperature Limits:

Process: -13 to 176°F (-25 to 80°C);

Ambient: -4 to 140°F (-20 to 60°C).

Pressure Limit: 11.6 psi (0.8 bar).

Power equirement: Select by model number: 115 VAC, 230 VAC or

24 VDC.

Power Consumption: AC version: 4 VA; DC version: 2.5 watt.

Enclosure: Aluminum, powder coated.

Enclosure ating: EMA 4 (IP66) and rated for Class II & III, Div. 1,

Group E, F, G.

Switch Type: SPDT micro switch.

Electrical ating: 5 A @ 250 VAC, 3 A @ 30 VDC.

Electric Connections: Screw terminals.

Conduit Connection: 3/4˝ female PT.

Process Connection: 1-1/4˝ male PT.

Mounting Orientation: Side or top mounting.

Sensitivity: Minimum material density of 6 lb/ft3(96 kg/m3).

Permitted Mechanical Loading:

Standard shaft: 67 lbf (300 ) max;

Optional extension: 22 lbf (100 ) max.

Weight: 2.6 lb (1.2 kg).

Agency Approvals: CE, FM.

5-1/8

[130.00]

5-29/32

[150.00]

3-5/8

[92.00]

25/64

[10.00]

1-1/4˝

NPT

PLS2-E-1-X

2X 3/4˝

NPT

4-23/32

[120.00]

3-15/61

[100.00]

1-3/8

[35.00]

7-7/8

[200.06]

PLS2-PL2

PLS2-PL1

3-15/16

[100.00]

3-15/16

[100.00]

1-29/64

[37.00]

4-59/64

[125.00]

INSTALLATION

The PLS2 should be mounted on the side or top of the tank or bin. The

conduit opening should be placed in a downward position, to protect from

moisture entering the unit through the conduit. When selecting a mounting

location, be sure the material can freely flow to and away from the shaft and

paddle. The shaft and paddle should also be out of the direct flow of material

as it fills the bin or tank. If it is necessary to mount in the flow stream, a

protective baffle should be installed on the inner wall of the bin.

Wiring

Make electrical connections per the wiring diagram for output switch options

selected. Wire in accordance with local codes. For hazardous locations, a

sealing fitting must be located within 18˝ of the control.

ASSEMBLY

MOUNTING P OCEDU E

ADJUSTMENT OF THE SP ING FO CE

MAINTENANCE/ EPAI

Upon final installation of the Series PLS2, no routine maintenance is

required. The Series PLS2 is not field serviceable and should be returned

if repair is needed. Field repair should not be attempted and may void

warranty.

WA ANTY/ ETU N

Refer to “Terms and Conditions of Sales” in our catalog and on our website.

Contact customer service to receive a Return Goods Authorization number

before shipping the product back for repair. Be sure to include a brief

description of the problem plus any additional application notes.

DWYE INST UMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

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