User Manual

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 NPT connection and unit
can be side or top mounted.
FEATURES
• 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
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
SPECIFICATIONS
Service: Dry powder or bulk materials compatible with wetted
materials.
Wetted Materials:
Paddle: 304 SS;
Exposed shaft: 303 SS;
Shaft seal: NBR;
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 Requirement: 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 Rating: NEMA 4 (IP66) and rated for Class II & III, Div. 1,
Group E, F, G.
Switch Type: SPDT micro switch.
Electrical Rating: 5 A @ 250 VAC, 3 A @ 30 VDC.
Electric Connections: Screw terminals.
Conduit Connection: 3/4˝ female NPT.
Process Connection: 1-1/4˝ male NPT.
Mounting Orientation: Side or top mounting.
Sensitivity: Minimum material density of 6 lb/ft
3
(96 kg/m
3
).
Permitted Mechanical Loading:
Standard shaft: 67 lbf (300 N) max;
Optional extension: 22 lbf (100 N) 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]
2
5/64
[
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]
P
LS2-PL2
PLS2-PL1
3
-15/16
[
100.00]
3-15/16
[100.00]
1
-29/64
[
37.00]
4
-59/64
[
125.00]