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http://www2.sea.siemens.com | Set 24 | 2007-12-12
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SITOP modular 40 A: load power supply with signaling module
LOGO!Power: power supply for LOGO! and sensors
LOGO!: displays text messages identifying fault locations and SITOP power system status
SITOP select: diagnostics module which monitors the distribution of current among the individual load circuits. Selective disabling of load circuit on overload or short-circuit, and signaling to the central fault
display (LOGO!)
Automation task:
Currently, 24V loads of a station are centrally fed and secured via one power supply. To increase the availability of individual loads and for diagnosing/localizing failures in case of a fault, the power distribution is to divided into several 24V load feeders. The automation solution must be as cost-efficient as possible and easily expandable.
Automation solution:
In the automation solution, a SITOP modular 40A is used as a 24V power supply. To divide the 24V supply into several load feeders, SITOP select modules are used. The individual load feeders are individually secured via a SITOP select. This prevents a failure of the entire 24V power supply. All SITOP Select are connected to the input of the LOGO! logic module for diagnostics purposes. If SITOP Select detects an error in the respective 24V load feeder, it is individually switched off and an error message is displayed at the LOGO!. This enables fast fault localization. Configuration can be expanded later.
Startup Code
For the startup we offer you software examples with test code and test parameters as download. The software examples support you during the first steps and tests with your Micro Application Sets. They enable quick testing of hardware and software interfaces between the products described in the Micro Application Sets.
MAS24 LOGO Startup Code
MAS24 Technical Manual
Applications
For systems with several 24-V load feeders connected to a central power supply (serves to distribute the load current)
For selective fusing of individual load feeders to prevent the complete system from malfunctioning in the event of a fault
For selective protection in widely distributed system components and distant loads (distributed design)
For consumers with high inrush current requirements which cannot be protected by quick-acting circuit-breakers
For fast fault localization