6
Installation
and Operation
EDBC250SIO | 2.0
193
6.3.10
Derating the Modules with Reference to Ambient Temperature
CAUTION
Do not operate the Safety I/O-module module out of the specified range
Faults by component overload
Operate the module under the ambient conditions listed in section Technical
Data only while observing the appropriate derating.
Safety I/O-module SDI16 SDO4 0.5A
The maximum rated total current and the maximum number of available I/O module inputs
depend on the ambient temperature of the safe I/O module. A derating is not required if the
24 V are supplied. If the maximum voltage of 28.8 V is supplied, refer to the diagram for the
resulting total current and number of inputs to also be limited with reference to the tempera-
ture.
The output current derating shown on the graph was measured under free convection in a
configuration with I/O modules on the left and right, 100% duty cycle and identical supply volt-
age.
Safety I/O-module SDI16 & Safety I/O-module SDI8 SDO2 0.5A
Derating not required.
Figure 13: Derating of total output current and number of inputs