Other Properties - Siemens SCALANCE XR324-4M EEC Operating Instructions Manual

6.5

Other properties

Table 6- 14
Max. number of learnable addresses
Aging time
Switching technique
Latency
Table 6- 15
Redundancy mechanism
HRP
Standby link
MRP
Mean time between failure (MTBF)
The values in the following table apply to the basic device without media modules.
Device version (power supply)
1 x 24 to 48 VDC
or
1 x 100 to 240 VAC / 60 to 250 VDC
2 x 24 to 48 VDC
or
2 x 100 to 240 VAC / 60 to 250 VDC
These values apply at 40 °C.
1)
The redundant power supply unit increases the reliability of the system. The MTBF value of the
2)
power supply unit is > 20 years.
In the calculation of the MTBF of a modular switch, the standard parts count applies; in other
words, the reciprocals of all component failure rates are added.
The reciprocal of this total id the MTBF of the entire assembly.
Table 6- 16
At 100 Mbps
148810
84459
45290
SCALANCE XR-300M EEC
Operating Instructions, 11/2015, A5E02661176-09
Switching properties
Reconfiguration times for redundancy mechanisms
Full wire speed switching
Number of frames per second
At 1000 Mbps
1488095
844595
452899
8000
30 sec
Store and forward
5 μs
Reconfiguration times
300 ms
300 ms
200 ms
MTBF
1)
> 15 years
> 15 years
2)
At a frame length of
64 bytes
128 bytes
256 bytes
Technical data
6.5 Other properties
53