Series DSS Direct-Contact Speed Switch
Specifications - Installation and Operating Instructions
Bulletin E-17
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-electric 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.
SPECIFICATIONS
Ambient Temperature Range:
14°F to 131°F (-10°C to +55°C).
Max. Operating Temperature:
DSS-E: Class T6: 185°F (85°C).
Enclosure:
Aluminum with screw cover.
Enclosure Rating:
DSS-W: NEMA 3S, 4 and 4X. DSS-E: NEMA 3S, 4 and 4X,
NEMA 7: Class I groups C and D, NEMA 9: Class II groups F and G, class III.
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 W.
Repeatability:
2% max. 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 s.
Radial Load on Input Shaft:
125 lbs max.
End Thrust on Input Shaft:
100 lbs max.
Rotation:
Either clockwise or counter-clockwise.
Driving torque:
1˝/lb max. Shaft: 5/8˝ diameter with 3/16˝ x 7/8˝ key; Weight: 5 lbs
(2.3 kg).
Compliance:
cUL, UL.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: [email protected]
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]
3/8
[9.53]
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]
