Dwyer PLS User Manual

3

/4˝ CONDUIT

CONNECTION

4

-11/32

[110.31]

4

-1/2

[113.69]

CLEARANCE FOR

C

OVER REMOVAL

4-31/32

[

126.19]
6-3/8

[162.05]

8-33/64

[

216.26]
1

0-5/16

[261.92]

Series PLS Paddle Level Switch

Specifications – Installation and Operating Instructions

ncorporated in the design of the PLS is a magnetic drive that is time proven by

I

ecades of use in our Mark Series valve position indicator product line. A synchro-

d

ous motor rotates the paddle utilizing a magnetic drive. As product builds up the

n
paddle is impeded from moving and the resulting motor torque activates the output
switches and stops the motor. A spring mechanism reactivates the motor and returns
the switches to normal state when the product no longer impedes the paddle rota­tion. Weatherproof models include a bright red LED switch status indication light.

Standard construction is weatherproof with explosion-proof optional, and the unit can
be side or top mounted. A high temperature option is available for use with media up
to 500°F (260°C). The PLS is designed with the industry standard 1-1/4˝ male NPT
connection and mounting flanges.

FEATURES

• Magnetic drive that isolates and completely seals the control head from the
process and environment preventing material or dust from entering the control
head.

• Motor shuts-off when paddle stalls increasing motor life, preventing motor
burnout, and decreasing power usage.

• Slip clutch design enabled by the magnetic drive that prevents damage to motor
and drive mechanism from sudden or excessive loading on the paddle.

• Status indication light on weatherproof models. Light is on the side of the enclo-
sure making it easy to view.

• Screw cover on the enclosure for easy access with no worries about losing bolts
or screws.

• Modular design to allow field installation of any paddle, flanges, shaft extensions,
or shaft guards.

• Flexible coupling available for protection of the paddle and drive from side loads,
surges or impacts. Recommended for top mount applications with shaft extension
and applications with large or heavy materials.

Bulletin L-25

IDE MOUNT

S

PECIFICATIONS

S
Service: Dry powder or bulk materials compatible with wetted materials.
Sensitivity: Minimum material density of 5 lb/ft

(3200 kg/m3).

Wetted Materials:

addles: 316 SS.

P

xposed Shaft: 316 SS.

E
Shaft Seal: PTFE.
Mounting Boss: Aluminum.
Flexible Coupling: 316 SS.
Mounting Flanges: Carbon Steel or 316 SS.
Shaft Extension and Shaft Guards: Galvanized Steel or 316 SS.

Temperature Limits:

Standard Construction: Process: -40 to 300ºF (-40 to 148.9ºC),

Control Head: -40 to 185ºF (-40 to 85ºC).
High Temperature: Process: -40 to 500ºF (-40 to 260ºC),
Control Head: -40 to 185ºF (-40 to 85ºC).

Time Delay Relay: Control Head: -25 to 140ºF (-31.7 to 60.0ºC).
CE Compliant Construction: Process: -40 to 185°F (-40 to 85°C),

Control Head: -40 to 185°F (-40 to 85°C).

Pressure Limit: 30 psig (2.07 bar) maximum for .5 micron or larger material.
Power Requirement: Select by part number: 110-120 VAC (~); 60 Hz, 230 VAC (~);

50/60 Hz, 24 VAC (~); 60 Hz, 48 VAC (~); 100 Hz, 12 VDC ( ), or 24 VDC ( ).
Power Consumption: Weatherproof models: 5 watts, Explosion-proof models: 3 watts.
Time Delay option is an additional 3 watt consumption.

Enclosure: Aluminum, powder coated.
Enclosure Rating: Weatherproof (W, WH construction): NEMA 4X, Explosion- proof

(E, EH construction): NEMA 4X and rated for Class I, Div. 1 & 2, Groups C & D, Div.
1 & 2, Groups E, F, & G.

Switch Type: SPDT or DPDT snap switch.
Electrical Rating: 15A @ 120/230 VAC, 5A @ 24 VDC.

Time Delay Relay Option: 10A @ 120/240 VAC and 30 VDC.
Electric Connections: Screw terminals.
Conduit Connection: 3/4˝ female NPT.
Process Connection: 1-1/4˝ male NPT. Optional flange.
Installation Category: II (Transient over-voltage).
Pollution Degree: 2.
Altitude Limit: 6560 ft (2000 m) max.
Environment: Intended for indoor and outdoor use.
Humidity: 80% RH (non-condensing).
Mounting Orientation: Side or top mounting.
Weight: Control head only: 4 lb (1.81 kg).
Indication Light: Red LED that activates when switch is made or when switch is not

made with RL option. (Not available on Explosion-proof models).
Time Delay Relay Option: Five field adjustable ranges from 0-1 to 0-31 minutes.
(RL option not available, DPDT option not available with 230 VAC time delay).
Agency Approvals: UL approved as an auxiliary device or as an auxiliary device for
hazardous locations.

3

(80 kg/m3), maximum of 200 lb/ft

3

PROXIMITY CONTROLS

A DIVISION OF DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]

CLEARANCE FOR

COVER REMOVAL

4-1/2

[113.69]

4-11/32

[110.31]

3/4˝ CONDUIT
CONNECTION

FLEXIBLE
COUPLING
(OPTIONAL)

SHAFT
EXTENSION

1/4˝ PIPE
COUPLING

PADDLE

SHAFT

GUARD

OVERALL SHAFT LENGTH

SPECIFIED ORDER

6-3/8

[162.05]

4-31/32

[126.19]

1

[25.40]

SIX 11/32 [8.74]

HOLES ON

7˝ [177.80] B.C.

HALF COUPLING

FLG-CSH
FLG-SSH

FULL COUPLING

FLG-CSF
FLG-SSF

8˝ O.D.

[203.20]

15/32

[11.94]

1-1/4 NPT

15/32

[11.94]

1/4 NPT

9/32

[7.14]

1/4 [6.35]

4-13/32 [111.92]

MODEL CHART

xample

E

eries

S
Construction

witch

S

Power

upply

S

Paddle

Flange

Shaft
Extension

aterial

M

rotective

P
Shield

Shaft Extension
and Shield Length

Options

PLS

PLS

W

1

S

SS

SS

SSF

1

W
E

H

W

H

E

S
D

D1

T

D2

T

1
2
3
4
5
6
7

0
1
2
3
4

0

SH

C
CSF

SH

S

SF

S

0
GS
SS

0
GS
SS

024

XXX

FC

PLS-W-S-1-1-SSF-SS-SS-024-FC

addle Level Switch

P

eatherproof

W

xplosion-proof

E

eatherproof High Temperature

W
Explosion-proof High Temperature
SPDT
DPDT

PDT Time Delay – 120 VAC

D

PDT Time Delay – 230 VAC

D

10-120 VAC

1

30 VAC

2
24 VAC
48 VAC
12 VDC

4 VDC

2

30 VAC CE Compliant

2

o paddle for Motor Control Only Style Low Density

N
Paddle (PDL-1)
Medium Density Paddle (PDL-2)
Bayonet Paddle (PDL-3)
High Density Paddle (PDL-4)

o Mounting Flange

N

arbon Steel with Half Coupling (FLG-CSH)

C
Carbon Steel with Full Coupling (FLG-CSF)

16 SS with Half Coupling (FLG-SSH)

3

16 SS with Full Coupling (FLG-SSF)

3

one

N
1/4˝ NPS Galvanized Steel
1/4˝ NPS 316 SS
None
1-1/4˝ NPS Galvanized Steel
1-1/4˝ NPS 316 SS
Specify length in inches. Minimum 6, Maximum 48.
May go longer on custom ordered product.

RL

Reversed Light – light indication when paddle free
rotating

FC

Flexible Coupling (CPL-FLX)

FLEX COUPLING, MODEL CPL-FLX

MOUNTING FLANGE

TOP MOUNT