12BTECHNICAL DATA
13.6 Data buffering
Buffer time of data in EEPROM
200 years
Permissible number of write cycles for
EEPROM
1,000,000
Table 13-6
Data buffering in EEPROM
13.7 Dimensions and weight
Dimensions W x H x D
40 x 125 x 130 mm
Weight 0.275
kg
Table 13-7
Data: Dimensions and weight
13.8 Environmental conditions
The use of SIWAREX U is intended under the following conditions in
SIMATIC S7 systems.
Usage conditions in accordance with IEC 60721:
Operation:
IEC60721-3-3
Stationary
use, weather-protected
Class
3M3,
3K3
Storage/Transport
: IEC
60721-3-2
Packaged for transport, no condensation
Class
2M2,
2K4
For use in extreme operating conditions (e.g. heavy dust, corrosive vapors
or gases etc.), additional measures are to be taken such as encapsulation.
Table 13-8
Data: Environmental conditions
13-74
SIWAREX U