SIEMENS
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Siemens IK PI · 2015
IO-Link
SIRIUS 3RR24 monitoring relays for mounting onto 3RT2 contactors for IO-Link
General data
5
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Overview
✓
Available
Features
3RR24
Benefits
General data
Sizes
Dimensions in mm (W x H x D)
• Screw terminals
• Spring-type terminals
S00, S0
S00: 45 x 79 x 80,
S0: 45 x 87 x 91
S00: 45 x 90 x 80,
S0: 45 x 109 x 92
•
Are coordinated with the dimensions, connections and technical characteristics
of the other devices in the SIRIUS modular system (contactors, soft starters,
etc.)
• Permit the mounting of slim and compact load feeders in widths of 45 mm
(S00 and S0)
• Simplify configuration
Current range
S00: 1.6 ... 16 A
S0: 4 ... 40 A
• Is adapted to the other devices in the SIRIUS modular system
• Just a single version per size with a wide setting range enables easy
configuration
Permissible ambient temperature
During operation
-25 ... +60 °C
• Suitable for applications in the control cabinet, worldwide
Monitoring functions
Current overshoot
✓
(Three-phase)
• Provides optimum inverse-time delayed protection of loads against excessive
temperature rises due to overload
• Enables detection of filter blockages or pumping against closed gate valves
• Enables drawing conclusions about wear, poor lubrication or other mainte-
nance-relevant phenomena
Current undershoot
✓
(Three-phase)
• Enables detection of overload due to a slipping or torn belt
• Guarantees protection of pumps against dry running
• Facilitates monitoring of the functions of resistive loads such as heaters
• Permits energy savings through monitoring of no-load operation
Apparent current monitoring
✓
(selectable)
• Precision current monitoring especially in a motor's rated and upper torque
range
Active current monitoring
✓
(selectable)
• Optimum current monitoring over a motor's entire torque range through the
patented combination of power factor and apparent current monitoring
Range monitoring
✓
(Three-phase)
• Simultaneous monitoring of current overshoot and undershoot with a single
device
Phase failure, open circuit
✓
(Three-phase)
• Minimizes heating of three-phase motors during phase failure through
immediate disconnection
• Prevents operation of hoisting equipment with reduced load carrying capacity
Phase sequence monitoring
✓
(selectable)
• Prevents starting of motors, pumps or compressors in the wrong direction
of rotation
Internal ground-fault detection
(residual current monitoring)
✓
(selectable)
• Provides optimum protection of loads against high-resistance short circuits
or ground faults due to moisture, condensed water, damage to the insulation
material, etc.
• Eliminates the need for additional special equipment
• Saves space in the control cabinet
• Reduces wiring overhead and costs
Blocking current monitoring
✓
(selectable)
• Minimizes heating of three-phase motors when blocked during operation
through immediate disconnection
•
Minimizes mechanical loading of the system by acting as an electronic shear pin
Operating hours counter
✓
•
Gives the time during which there was a measurable current in at least 2 current
paths
• As an indicator for upcoming maintenance or replacement of machine and
system components
Operating cycles counter
✓
• Is incremented by one each time a breaking operation is detected, in other
words a transition from three-phase current flow to no measurable current flow
• As an indicator for upcoming maintenance or replacement of contact blocks
W
H
D
© Siemens AG 2014