Datasheet

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59
Available Models:
Features:
• Alarm logic available in 24VAC or 115VAC
• Choice of multiple functions for motor
control logic
• Motor control logic functions available
in multiple current ranges
• Status LED
Approvals:
LSRU-24-AL-2
LSRU-24-AL-3
LSRU-115-AL-1.5
LSRU-115-AL-2
LSRU-115-AL-3
LSRU-115-FC-1.5
LSRU-115-OT-1.5
LSRU-115-OT-2
LSRU-115-OT-3
LSRU-115-OR-1.5
LSRU-115-OR-2
LSRU-115-UE-2
LSRU-115-UT-2
LSRU-115-UT-3
LSRU-115-UR-2
LSRU-115-UR-3
LSRU-115-OU-1.5
LSRU-115-OU-2
LSRU-115-OU-3
Specications
The Model LSRU
is a microcontroller-based family of load sensors.
The LSRU family of products employ three basic
types of control logic: motor control logic, alarm
logic and feed control logic.
Motor Control Logic
Several combinations of functions are available in
the LSRU, including overcurrent and undercurrent
or either overcurrent or undercurrent with
variable trip, restart or extended restart delay
settings. These various versions of the LSRU trip
on the respective fault and then automatically
reset after the restart delay expires, in preparation
for the next motor start. LSRUs do not trip on
undercurrent when the load turns off, this is
recognized as a normal condition.
Alarm Logic
The LSRU-AL simply indicates whether the current is between the setpoints or outside of the
setpoints. This product is best used with a PLC or other controller where status indication is desired.
Feed Control
The LSRU-FC is a load monitor intended to control feeder mechanisms in a variety of applications.
It stops the feeder when the grinder, chipper, saw, auger, etc. nears overload. When the load is
reduced to a preset level, the feeder is restarted.
For more information see:
See Appendix A, page 70, Figure 14 for dimensional drawing.
See Appendix B, page 80, Figure 49 for typical wiring diagrams.
Model LSRU
load sensor, choice of three types of control logic and three amperage ranges
Load Sensor
Functional Characteristics
Isolation .......................................600VAC rms
Power .........................................2 Watts
Motor Acceleration Time ........................2 seconds
When not selected as an option:
Fixed Trip Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 second
(-AL, -FC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 second
Fixed Restart Delay .............................1 second
(-AL only) .....................................as soon as current is within limits
(-FC only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 second
Input Characteristics
Control Power .................................24VAC or 115VAC
Output Characteristics
Output Contact Rating (SPDT)
Pilot Duty .....................................480VA @ 240VAC
General Purpose ................................10A @ 240VAC
General Characteristics
Temperature Range .............................-40° to 70°C (-40° to 158°F)
Wire Size ......................................#12-24AWG
Hole Size ......................................0.725” diameter
Terminal Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 in.-lbs.
Safety Marks
CSA, CSA-NRTL/C ............................(File #46510)
CE
Dimensions ....................................1.67” H x 2.3” W x 3.56” D
(42.42 x 58.42 x 90.43 mm)
Weight ........................................0.5 lb. (8 oz., 226.8 g)
Mounting Method ..............................Four #6 screws 3/4” in length
Caution: This product should not be relied upon solely for safety of life or safety applications.
O - Overcurrent Trip
U - Undercurrent Trip
T - Adj. Trip Delay (0.5-60 seconds)
R - Adj. Restart Delay (0.5-300 seconds, Manual)
E - Adj. Extended Restart Delay (2-300 minutes, Manual)
1.5 - 0-10 Amps
2 - 5-25 Amps
3 - 25-100 Amps
CATALOG_SYMCOM_2014.indd 59 6/10/14 11:06 AM