Dwyer DSS - Manual

The Series DSS Direct-Contact Speed Switch is a compact switch
designed to include all mechanical and electronic components in one
housing. It will produce an output signal at a predetermined speed which
may be either over-speed, under-speed or zero-speed. Rugged, heavy-
duty construction combined with solid state electronics and photo-elec-
tric technology makes this one of the most advanced motion detectors
available. Series DSS protects all valuable rotating equipment including
belt conveyors, bucket elevators, rotary feeders or screw conveyors. It
operates in a clockwise or counter-clockwise direction and mounts in
any position.
Series DSS Direct-Contact Speed Switch
Specifications - Installation and Operating Instructions
Bulletin E-17
SPECIFICATIONS
Temperature Limits: -50° to 150°F (-45° to 65°C).
Enclosure: Aluminum with screw cover
Enclosure Rating: DSS-W: NEMA 3S, 4 & 4X. DSS-E: NEMA 3S, 4 &
4X, NEMA 7: Class I groups C & D, NEMA 9: Class II groups F & G.
Switch Type: DPDT.
Electrical Rating: 3A @ 120/240 VAC, 1/10 Hp @120/240 VAC.
Electrical Connections: Screw terminal.
Conduit Connections: (2) 3/4” female NPT.
Mounting Orientation: Any.
Set Point Adjustment: Adjustment screw.
Power Requirements: 105-135 VAC, 50/60 Hz, 210-250 VAC, 50/60
Hz; or 24 VAC/DC depending on model.
Power Consumption: 3 watts.
Repeatability: 2% maximum at constant voltage and temperature.
Pick-up Point: 3 speed ranges at which relay will energize:
Low: 0.1 to 10 RPM;
Medium: 1 to 100 RPM;
High: 10 to 1000 RPM.
Signal Point: Speed at which relay will de-energize. Recommended to
be 15-20% lower than pick-up point.
Start-up Delay: Adjustable up to 45 seconds.
Radial Load on Input Shaft: 125 lbs maximum.
End Thrust on Input Shaft: 100 lbs maximum.
Rotation: Either clockwise or counter-clockwise.
Driving Torque: 1”/lb maximum.
Shaft: 5/8” diameter with 3/16” x 7/8” key.
Weight: 5 lbs (2.3 kg).
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 46360, U.S.A.
ø4-3/4
(120.65)
4-7/8
(123.83)
FRONT VIEW SIDE VIEW
2
(50.8)
1-17/64
(32.03)
8-63/64
(228.09)
3/4” NPT PIPE TAP
BOTH SIDES
REAR VIEW
7/8
(22.23)
2-1/2
(63.50)
1-1/4
(31.75)
MOUNTING HOLE PLAN
2-1/4
(57.15)