Decoupling modules Siemens
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Обзор
A decoupling module must be used:
- When using a current/voltage measuring module, if the supply system is not grounded.
- When using a current measuring module or a current/voltage measuring module when the system bus has reached its maximum current consumption.
If a mixed configuration is planned with temperature module, digital module and current measuring module or current/voltage measuring module, it must be checked first whether a decoupling module is required.
If
(Number (temperature module) * 2 + Number (digital module) * 1 + Number (current measuring module or current/voltage measuring module) * 4) > 14,
a decoupling module is then required.
For a calculation example, see the "SIPLUS HCS300I Heater Controller" System Manual, http://support.automation.siemens.com/WW/view/en/54439691.
Note:
For this equation, each module type is weighted with a specific current factor, see Table.
Module | Current factor |
Temperature module | 2 |
Digital module | 1 |
Current measuring module, | 4 |
Особенности
- Electrical isolation of the current/voltage measuring module from the previous expansion modules (digital module, temperature module) or a basic unit
- Power supply for a current measuring module or a current/voltage measuring module when the system bus has reached its maximum current consumption