ABB NU8976a HIER466665R99 control board

ABB NU8976a HIER466665R99 control board

Technical data of product parameters

System earthing problems caused by a flash of lightning could be minimized due to the following methods:
– complete shielding of the field wiring of HIMA communication systems
– correct installation of the system earthing.
In especially exposed environments outside of buildings it could be advisable to provide lightning protection by using special lightning protection modules. For this the module of type NU8976a HIER466665R99
MTRS 485 “DATA-MODUTRAB” from Phoenix company is used. The module is provided for
coarse protection (influences up to 10 kA) and fine protection (influences up to 400 A).
The connection of the lightning protection modules is according to the sketch below:The using of this lightning protection module reduces the max. possible transmission length
because of its series resistance of 4.4 Ω. Two modules are necessary per channel. NU8976a HIER466665R99
For HIBUS-2 the max. transmission length is 1200 m with 0.25 mm2 wiring cross section. The
loop resistance is 180 Ω in this case (with regard of the specific line resistance of copper and
the double transmission length). The calculation of the remaining length of the bus refers on a NU8976a HIER466665R99
continuous wiring wit h the same cross-section according to the formula:The system wiring of H41q/H51q specifies colors and color codes for cables and wires regarding the relevant international standards.
Deviant from the HIMA standard the customer can also use different cable colors for wiring
based on national normative requirements. These deviations shall be documented and verified.The tests and recommended measures for the startup, maintenance and fault detection are
briefly summarized.
To limit the scope of the documentation, the chapters concerned in this catalog and in the other
printouts of the HIMA system documentation are referred to.The control cabinets are delivered with the modules plugged in and fixed with screws, and with
free connectors. They have been tested with these modules in the factory, so that the following
tests concentrate on the correct external installation.

Product picture display

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This article from the temporal Ming sheng automation equipment co., LTD.,

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