Entering Siemens Relays
The following table describes the part parameters required for relays when Siemens is the selected calculation model. This Siemens component model is based on Siemens Norm SN 29500-7, Edition 2005-11, Failure Rates of Components: Expected Values for Relays.
Parameter
Type
Description
Type
Choice List
The type of device. Choices vary by subcategory.
Run-In
Choice List
Required only for the Hermetically Sealed Twin Contacts types of the Low Duty subcategory.
Indicates if run-in monitoring is in use. Choices are:
With Run-in Monitoring
Without Run-in Monitoring
# of Contacts
Number
Required only for certain types of some subcategories.
The number of conductive elements in the connector that mate with other elements for the purpose of transferring electrical energy.
Critical Failure Criterion
Checkbox
Required only for certain types of some subcategories.
Indicates if the critical failure criterion is to taken into account.
Supporting Structure
Choice List
The material of the supporting structure. Choices are:
Ceramic
Glass
Metal
Plastic
Contact Surface
Choice List
The material coating the contact surface. Choices are:
Gold Coating
No Coating
Tungsten Tipped
Contact Force
Number
The contact force.
Load Type
Choice List
The type of load. Choices are:
Resistive (DC)
Resistive (AC)
Capacitive and Lamp (DC)
Capacitive and Lamp (AC)
Inductive (DC)
Inductive (AC)
Environment
Choice List
The environment in which the device is used. Choices are:
Rooms with extreme levels of dust
Rooms without extreme levels of dust
[Voltage Parameters]
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For more information, see Voltage Parameters.
[Current Parameters]
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Required only for certain types of some subcategories.
For more information, see Current Parameters.
[Temperature Parameters]
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For more information, see Basic Temperature Parameters.
[Derating Parameters]
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For more information, see Derating Parameters.