Series PLS Paddle Level Switch
Bulletin L-25
Specifications – Installation and Operating Instructions
3/4˝ CONDUIT
CONNECTION
4-11/32
[110.31]
4-1/2
[113.69]
CLEARANCE FOR
COVER REMOVAL
4-31/32
[126.19]
6-3/8
[162.05]
8-33/64
[216.26]
10-5/16
[261.92]
Incorporated in the design of the PLS
is a magnetic drive that is time proven by
decades of use in our Mark Series valve position indicator product line. A synchro-
nous motor rotates the paddle utilizing a magnetic drive. As product builds up the
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 rota-
tion. 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.
SPECIFICATIONS
Service:
Dry powder or bulk materials compatible with wetted materials.
Sensitivity:
Minimum material density of 5 lb/ft
3
(80 kg/m
3
), maximum of 200 lb/ft
3
(3200 kg/m
3
).
Wetted Materials:
Paddles:
316 SS.
Exposed Shaft:
316 SS.
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.
SIDE MOUNT
PROXIMITY CONTROLS
Phone: 219/879-8000
www.dwyer-inst.com
A DIVISION OF DWYER INSTRUMENTS, INC.
Fax: 219/872-9057
e-mail: [email protected]
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
www.
.com
1.800.561.8187
