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Overvoltage Protection Devices Type 2
Residual Current Protective Devices Type B
The quality of the power supply unit alone cannot guarantee fault-free 24 V supply. Power failures, extreme variations in the mains voltage, or a faulty load can bring plant operation to a standstill and cause high costs. This is why we offer a unique range of perfectly integratable expansion modules for reliable protection against a wide variety of potential hazards on the primary and secondary side. The expansion modules allow completely flexible expansion of SITOP power supply units and extension up to total all-round protection.
Protection due to…
Failure of a power supply unit
Redundant design of the power supply with SITOP redundancy modules
Overload in 24 V circuit
Electronic protection of 24 V feeders with SITOP selectivity modules
Short-term power failure on the input side (Brownout)
Buffering of the 24 V power supply with SITOP buffer modules
Long-term power failure on the input side (Blackout)
Buffering of the power supply for up to several hours with the uninterruptible power supply from SITOP
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Brochure incl. Datasheet
Catalog KT 10.1
The standards-compliant configuration of the control panel plays a major role here. Control circuits according to NEC Class 2 must be limited in power to 100 VA. By selecting the right power supply and fuse protection, acceptance can be simplified significantly and costs can also be saved.
The new SITOP PSE200U with a common signaling contact or signal-channel signaling limit the performance per output to a maximum of 100 VA. This means that electronic monitoring of four 24 V load circuits according to NEC Class 2 is possible.
Different 24 V supply concepts, such as redundant power supply or buffering in case of power failure, can be easily integrated into the process control system with the help of software blocks and faceplates. This means that PCS 7 users automatically receive information about operating status conditions, maintenance requirements or disturbances, e.g. power failure.