SIEMENS
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Siemens IC 10 · 2017
Relays
SIRIUS 3RR24 Monitoring Relays for Mounting onto 3RT2 Contactors for IO-Link
Current and active current monitoring
10
Article No. scheme
Note:
The Article No. scheme shows an overview of product versions
for better understanding of the logic behind the article numbers.
For your orders, please use the article numbers quoted in the
selection and ordering data.
■
Benefits
•
Can be mounted directly on 3RT2 contactors and
3RA23 reversing contactor assemblies, in other words, there
is no need for additional wiring in the main circuit
•
Optimally coordinated with the technical characteristics of the
3RT2 contactors
•
No separate current transformer required
•
Variably adjustable to overshoot, undershoot or range
monitoring
•
Freely configurable delay times and RESET response
•
Display of ACTUAL value and status messages
•
All versions with removable control current terminals
•
All versions with screw or spring-type terminals
•
Simple determination of the threshold values through direct
reference to actually measured values for setpoint loading
•
Range monitoring and selectable active current measurement
mean that only one device for monitoring a motor is required
along the entire torque curve
•
In addition to current monitoring it is also possible to monitor
for current unbalance, broken cables, phase failure, phase
sequence, residual current and motor blocking.
•
Integrated counter for operating cycles and operating hours to
support requirements-based maintenance of the monitored
machine or application
•
Simple cyclical transmission of the current measured values,
relay switching states and events to a controller
•
Remote parameterization
•
Automatic reparameterizing when devices are exchanged
•
Simple duplication of identical or similar parameterizations
•
Reduction of control current wiring
•
Elimination of testing costs and wiring errors
•
Reduction of configuration work
•
Integration in TIA means clear diagnostics if a fault occurs
•
Cost saving and space saving in control cabinet due to
the elimination of AI and IO modules as well as analog signal
converters and duplicated sensors
Advantages through energy efficiency
Overview of the energy management process
We offer you a unique portfolio for industrial energy manage-
ment, using an energy management system that helps to
optimally define your energy needs. We split up our industrial
energy management into three phases – identify, evaluate, and
realize – and we support you with the appropriate hardware and
software solutions in every process phase.
The innovative SIRIUS industrial controls products can also
make a major contribution to the energy efficiency of a plant
(www.siemens.com/sirius/energysaving)
.
The 3RR2 monitoring relays contribute to energy efficiency
throughout the plant as follows:
•
Shutdown in the event of no-load operation
(e.g. pump no-load operation)
•
Load shedding of predefined loads in the event of current
overshoots
■
Application
•
Monitoring for current overshoot and undershoot
•
Monitoring of broken conductors
•
Monitoring of no-load operation and load shedding, e.g. in the
event of a torn V-belt or no-load operation of a pump
•
Monitoring of overload, e.g. on pumps due to a dirty filter
system
•
Monitoring the functionality of electrical loads such as heaters
•
Monitoring of wrong phase sequence on mobile equipment
such as compressors or cranes
•
Monitoring of high-impedance faults to ground, e.g. caused
by damaged insulation or moisture
The use of SIRIUS monitoring relays for IO-Link is particularly
recommended for machines and plant in which these relays, in
addition to their monitoring function, are to be connected to the
automation level for the rapid, simple and fault-free provision of
the current measured values and/or for remote parameterization.
The monitoring relays can either relieve the controller of monitor-
ing tasks or, as a second monitoring entity in parallel to and in-
dependent of the controller, increase the reliability in the process
or in the system. In addition, the elimination of AI and IO modules
allows the width of the controller to be reduced despite signifi-
cantly expanded functionality.
Product versions
Article number
3RR24 monitoring relay, digitally adjustable with IO-Link
3RR2
4
4
@
–
@
A
A
4
0
Size
S00
1
S0
2
S2
3
Connection type
Screw terminals
1
Spring-type terminal
2
Example
3RR2
4
4
1
–
1
A
A
4
0
IC01_00244
© Siemens AG 2016