Dwyer Instruments PDL-3, PDL-1, PLS-W-S-1-3-0-0-0, PLS-W-S-1-0-0-0-0, PLS-W-S-1-2-CSH-0-0 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.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

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

W
E
W

H

E

1

S

H

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

SS

0
GS
SS

0
GS
SS

SS

SSF

1

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

TOP MOUNT

PADDLES

1-9/64
[28.93]

11/64
[4.32]

6-15/32

[

164.13]

1/8

PIN

HOLE

1/4

NPT

T

URNS

I

N

7

˝

[

177.80]
C

IRCLE

1

[25.40]

11/64

[4.32]

1/8
PIN

HOLE

2

[

50.80]

1/4

NPT

T

URNS

I

N

4

-1/2˝

[

114.30]
C

IRCLE

4-3/32

[103.99]

4-53/64

[122.66]

11/64

[4.32]

1

/4

N

PT

1

/8

P

IN

H

OLE

TURNS IN

7˝ [177.80]

CIRCLE

1-1/2
[38.10]

1

1/64

[

4.32]

1/8

PIN

HOLE

2

-15/64

[

56.77]

1/4 NPT

T

URNS IN

5

˝ [127.00]

C

IRCLE

PDL-1. 316 SS three vane paddle for light weight materials
with a minimum bulk density of 5 lb/ft

PDL-3. 316 SS single vane paddle for medium weight mate­rials with a minimum bulk density of 30 lb/ft

3

(80 kg/m3).

3

(481 kg/m3). Fits
through a 1-1/4˝ coupling eliminating the need for a mount­ing flange.

INSTALLATION
Mounting Location

Select a location where the paddle is out of the direct flow of media/material, and
where media does not accumulate permanently. It may be necessary to protect the
paddle with a protective shield or baffle protection.
Protection provided by the equipment may be impaired if the equipment is used with
accessories not provided or recommended by Proximity, or is used in a manner not
specified by Proximity.

Mounting Accessories

Shaft Extensions and Flexible Shaft/Coupling
A standard paddle extension is supplied with all controls that is used to connect the
stub shaft of the control head to a paddle or to an extension shaft constructed of 1/4˝
pipe. Shaft extensions may be purchased from Proximity Controls in carbon steel and
stainless steel. Shaft extensions may also be constructed from 1/4˝ pipe, which is
threaded with 1/4˝ male NPT connections on both ends. Drill .152˝ diameter holes
through the pipe at a distance of .170˝ from each end. These holes should accept a
1/8˝ diameter roll pin. Shaft extensions should not exceed 48˝ in length. Multiple cou­plings may be connected using coupling model number CPL-1.
Note: All joints should be secured with the 1/8˝ diameter roll pins supplied. Care
should be taken to press pins flush without damaging the bearings of the control.

A flexible shaft/coupling, model number CPL-FLX, may be substituted for the stan­dard extension. The flexible coupling helps protect the control by absorbing side load­ing, heavy loading, or loading caused by material surges. It is also recommended for
top mount applications when shaft extensions are used.

Shaft Shields
Shaft shields are recommended for use with shaft lengths over 12˝ to protect the shaft
from side loading. Shaft shields are available from Proximity Controls in carbon steel
and stainless steel. Shields may also be constructed from 1-1/4˝ pipe, which is
threaded with a 1-1/4˝ male NPT connection on one end. Shield pipe should be cut to
cover the shaft length while allowing sufficient clearance between the paddle and bot­tom of shield. The shaft shield should be securely threaded into a full coupling weld­ed to the bin or a full coupling mounting flange attached to the bin. Shaft should not
contact the inside diameter of the shaft shield.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

PDL-2. 316 SS three vane paddle for medium weight mate­rials with minimum bulk density of 30 lb/ft

PDL-4. 316 SS single vane paddle for heavy weight materi­als with a minimum bulk density of 70 lb/ft

3

(481 kg/m3).

3

(1122 kg/m3). Fits
through 1-1/4˝ coupling eliminating the need for a mounting
flange.

Mounting Procedure

Mounting without a Flange
Paddles PDL-1 and PDL-3 will fit through a 1-1/4˝ coupling making a mounting flange
unnecessary. A mounting flange may also be avoided for applications where there is
access to the inside of the bin to attach the paddle from the inside once the switch
control head is installed.

Locate the desired mounting point and cut a hole in the bin of the proper diameter to
insert a 1-1/4˝ pipe coupling. For mounting without a shaft shield weld a 1-1/4˝ half
pipe coupling to the bin wall so that the coupling is flush with the interior wall. For
mounting with a shaft shield weld a 1-1/4˝ full coupling so that the coupling is halfway
into the bin. If using a PDL-1 or PDL-3 attach the paddle to the switch control head,
if not already connected, by screwing into the 1/4˝ NPT connection on the shaft and
inserting the roll pin. Attach the switch control head to the pipe coupling buy inserting
the paddle through the coupling and screwing in. If attaching the paddle from the
inside then first attach the switch to the coupling and then attach the paddle from the
inside of the bin as described above.

Mounting with a Flange
Paddles PDL-2 and PDL-4 will require flange mounting if the interior of the bin is not
accessible. Half coupling flanges (Models FLG-CSH and FLG-SH) should be used on
installations not requiring a shaft guard. Full coupling mounting flanges (Models FLG­CSF and FLG-SSF) should be used with installations requiring a shaft guard.

If the mounting flange is used on a flat surface, layout a 7˝ bolt circle. The flange is
designed with clearance holes for 1/4˝ bolts or screws. Drill and tap 6 holes equally
spaced, on the bolt circle, of the appropriate thread type. At the center cut a hole of
sufficient clearance diameter to allow insertion of the paddle selected. It may be nec­essary to tack weld bolts or screws to the flange or inner surface of the bin. On bins
with curved surfaces it may be necessary to create a template, which will follow the
contour of the bin wall, in order to locate the hole positions. Use the gasket supplied
if required between the bin wall and flange.

eneral

POTENTIOMETER

DIP

SWITCH

120 OR 230 VAC
POWER INPUT
(DEPENDING ON
MODEL)

RELAY OPTIONS
(ONE SET OR TWO
SETS OF SWITCHES
DEPENDING ON
MODEL)

N

C

N

O

C

OM

P

OWER INPUT
TERMINALS
+

–

GROUNDING

S

CREW

G

f a control is mounted on the side wall of a bin, the conduit entry should be directed

I

ownwards. Also there should be ample clearance for cover removal. Paddles are

d

ecured to the extensions with a 1/4˝ NPT and 1/8˝ diameter roll pin. Care should be

s
taken to press pins flush without damaging the bearings of the control.

Electrical

ake electrical connections per the wiring diagram for output switch options select-

M

d. Wire in accordance with local codes. For hazardous locations, a sealing fitting

e

ust be located within 18˝ of the control.

m

Wiring

An external switch or circuit breaker should be added to during the installation as a
disconnecting device. The switch or circuit breaker must meet the requirements of

EC 60947-1 and IEC 60947-3, shall disconnect all current carrying conductors, and

I

hall not interrupt the protective earth ground. The disconnecting switch or circuit

s

reaker must be marked or labeled with the symbols “I” for on and “O” for off, per IEC

b
60417-5007 & IEC 60417-5008 and shall be marked as “Disconnecting Device”. Do
not position the PLS in a space where it is difficult to operate the disconnecting device
that provides power. 300V @ 105°C 18 AWG/0.75 mm
insulation with 94-V0 or FV-0 flammability rating is recommended for the switch out-

uts and power.

p

s a permanently installed piece of equipment, a power disconnect

A
switch, circuit breaker, or other approved disconnect device must be
installed in close proximity to the installed board and within easy reach
of the operator. This disconnect device must include a label indicating
its function as a mains disconnect. A 15amp circuit breaker or fuse

evice is recommended.

d

ime Delay

T

With the DIP position 1 set to “off” the delay is upon energizing of the relay, and with
it set to “on” the delay is upon de-energizing of the relay. Select delay range wanted
from the chart and set the dip switches to the appropriate positions. Then adjust the
one-turn (360˚) potentiometer for the exact time interval required within the selected
delay range. Example: If a 5 minute delay is required, set DIP switches to 0-7 minute
position. Then use potentiometer to adjust to 5 minute period.

2

wiring with PVC or equivalent

TANDARD CONTROL WIRING DIAGRAM

S

TIME DELAY OPTION WIRING DIAGRAM

Time Delay
Range in Minutes

0-1
0-3
0-7
0-15
0-31

MAINTENANCE

Upon final installation of the Series PLS Paddle Level Switch, no routine maintenance
is required. A periodic check of system calibration is recommended. The Series PLS
is not field serviceable and should be returned if repair is needed (field repair should
not be attempted and may void warranty). Be sure to include a brief description of the
problem plus any relevant application notes. Contact customer service to receive a
return goods authorization number before shipping.

Explanation of Symbols:

Symbol

~

Dip Switch Positions

2

3

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

Publication

IEC 50417 - 5031

IEC 50417 - 5032

IEC 50417 - 5019

IEC 50417 - 5007

IEC 50417 - 5008

5

4

OFF

OFF

OFF

ON

ON

ON

ON

ON

ON

ON

7

6

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

ON

Description

Direct current

Alternating current

Protective conductor terminal

On (supply)

Off (supply)

©Copyright 2011 Dwyer Instruments, Inc.

PROXIMITY CONTROLS

A DIVISION OF DWYER INSTRUMENTS, INC.

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Printed in U.S.A. 9/11

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

FR# 85-442245-00 Rev. 4