SIEMENS
10/72
Siemens IC 10 · 2017
Relays
SIRIUS 3RR24 Monitoring Relays for Mounting onto 3RT2 Contactors for IO-Link
Current and active current monitoring
10
✓
Available
Possible ways of combining the 3RR24 monitoring relay with the 3RT2 contactor for IO-Link
✓
Available
Notes:
Devices required for the communication via IO-Link:
•
Any controller that supports the IO-Link (e.g. ET 200SP
with CPU or S7-1200);
see Catalog ST 70 "Products for
Totally Integrated Automation"
.
•
IO-Link master (e.g. CM 4xIO-Link for SIMATIC ET 200SP
or SM 1278 for S7-1200);
see pages 2/108, 2/109
.
Each monitoring relay requires an IO-Link channel.
Features
3RR24
Benefits
Features
RESET function
✓
• Allows manual or automatic resetting of the relay
•
Resetting directly on the device, by switching the control supply voltage off
and on or via IO-Link (remote RESET)
ON-delay time
0 … 999.9 s
• Enables motor starting without evaluation of the starting current
• Can be used for monitoring motors with lengthy start up
Tripping delay time
0 … 999.9 s
• Permits brief threshold value violations during operation
• Prevents frequent warnings and disconnections with currents near the
threshold values
Operating and indicating elements
Displays and buttons
• For setting the threshold values and delay times
• For selectable functions
• For quick and selective diagnostics
• Displays for permanent display of measured values
Integrated contacts
1 CO contact,
1 semiconductor output
(in SIO mode)
•
Enable disconnection of the system or process when there is an irregularity
• Can be used to output signals
Design of load feeders
Short-circuit strength up to 100 kA
at 690 V
(in conjunction with the corresponding fuses or the
corresponding motor starter protector)
✓
• Provides optimum protection of the loads and operating personnel in the
event of short circuits due to insulation faults or faulty switching operations
Electrical and mechanical
matching to 3RT2 contactors
✓
• Simplifies configuration
• Reduces wiring outlay and costs
• Enables stand-alone installation as well as space-saving direct mounting
Spring-type connection system for main circuit
(with S00, S0) and auxiliary circuits
✓
(Optional)
• Enables fast connections
• Permits vibration-resistant connections
• Enables maintenance-free connections
Other features
Suitable for single and three-phase loads
✓
• Enables the monitoring of single-phase systems through parallel infeed at
the contactor or looping the current through the three phase connections
Wide setting ranges
✓
• Reduce the number of variants
• Minimize the configuration outlay and costs
• Minimize storage overheads, storage costs, tied-up capital
Power supply
24 V DC
• Direct via IO-Link master or via an external auxiliary voltage independent
of the IO-Link
• Minimizes the configuring overhead and costs
Monitoring relays
Current range
Contactors
(type, size, rating)
3RT201
3RT202
3RT203
S00
S0
S2
Type
A
3/4/5.5/7.5 kW
5.5/7.5/11/15/18.5 kW
18.5/22/30/37 kW
3RR2441
1.6 ... 16
✓
With stand-alone installation
support
With stand-alone installation
support
3RR2442
4 ... 40
With stand-alone installation support
✓
With stand-alone installation
support
3RR2443
8 ... 80
With stand-alone installation support
With stand-alone installation
support
✓
© Siemens AG 2016