PROTECT YOUR EQUIPMENT WITH
TORQ SPEED SWITCH
UNDERSPEED AND OVERSPEED MODELS
The TORQ Speedetex® ESS Electronic
Speed Switch is used
in bulk material handling/processing systems to monitor speeds
of belt conveyors, screw conveyors, bucket elevators, rotary
feeder shafts, rotating drums and other types of rotating machinery
to protect elevators, feeders and conveyors from speed related
damage resulting from broken belts, overloads, or belt slippages.
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The
controls are easy to set with an LCD display to precisely
set speed and/or monitor actual shaft speed. The dual function
tachometer/speed switch, gives the user immediate feedback
at the point of operation. A key feature of the switch is
that it can be set without driving the
unit. Input to the LCD
display is made with four pushbuttons. Two of the pushbuttons
increase or decrease setpoint speeds. Another controls overspeed
or underspeed selection. The fourth pushbutton sets the LCD
readout to setpoint adjustment or the tachometer function.
The LCD display indicates output logic (ON or OFF). The terminal
block is Euro design to simplify terminal connections. The
unit's enlarged case makes it easier to install and precisely
set controls.
SWITCH OPERATION:
This rugged, completely self-contained NEMA-4
switch is a rotary shaft speed detector and tachometer. It
will electronically detect either underspeed or overspeed.
This is accomplished by setpoint selection done directly thru
pushbuttons and is displayed on the LCD readout. The actual
shaft speed can be displayed on the LCD by a simple push of
a button.
When the shaft speed on a piece of equipment
exceeds or falls below the setpoint speed, change is immediately
detected and output is provided via relay contacts to actuate
motor contactors, audible alarms, warning lights, PLC's etc.
Maximum response time is the time required to rotate 1/16 of
a turn at the set speed for a standard unit, or 1/60 of a turn
for the high response option, after the shaft passes through
the set speed. The output condition is displayed as "ON" or
"OFF". When "ON" is displayed, the driven speed exceeds the
overspeed setpoint, or is below the underspeed setpoint. The
output relay is de-energized in this condition and the "Alarm"
contact (N.C.), closed in the output relay. The ESS also falls
into this condition under loss of power providing the logic
that indicates "Alarm" under power failure to the ESS.
| SPECIFICATIONS: |
| Input Power - Options |
120 VAC and 240 VAC ± 10%
50/60 HZ
12-15 VDC, 22-30 VDC, and 100-130 VDC |
| Output Power |
10.0 amps contact rating @ 250 VAC/30
VDC |
| Speed Ranges |
1-5000 (1/16 turn response)
0.1 to 500.0 RPM (1/60 turn response) |
| Prestart Delay |
8 seconds (1-5000 RPM) (Underspeed mode)
20 seconds (.1-500 RPM) |
| Power Failure Protection |
Goes into alarm state on power failure |
| Bearing life |
10,000 hr. @ 5000 RPM
(lower with radial side load) |
| Setpoint Stability |
±1.5% (1-5000 RPM)
±3% (.1-500 RPM)
Nominal 32°F to 105°F
(0°C
to 41 °C) |
| Setpoint Resolution |
1 Digit |
| Setpoint Hysteresis |
10% (1-5000 RPM)
20% (.1-500 RPM) |
| Operating Temp Range |
-22°F to 150°F (-30°C
to 66°C) |
| Shaft Torque Required |
4 oz. in. (.0029 Kg Meter) |
| Continuous Running Speed |
5000 RPM Maximum |
| Direction of Rotation |
Either - no effect |
| Radial Load |
50 Lbs. (22.7 Kg) Maximum |
| Case Construction |
NEMA 4 |
| Shipping Weight |
4 Lbs. (1.8 Kg) |
Custom Modifications available
such as special shaft machining, diameters, mounting, finishes,
supply voltage, etc.
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