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HIMax System 9 Life Cycle<br />
is permitted. Earthing of positive pole L+ is not permitted since a potential earth fault on the<br />
transmitter line would bypass the affected transmitter.<br />
L- can only be earthed on one place within the <strong>system</strong>. L- is usually earthed directly behind<br />
the power supply unit (e.g., on the busbar). The earthing should be easily accessible and<br />
well separable. The earthing resistance must be ≤ 2 Ω.<br />
Measures for Installing the Control Cabinet in Conformity with the CE Label<br />
In accordance with the EU Council Directive 89/336/EEC, converted in the EMC law for the<br />
Federal Republic of Germany, from the 1st January 1996, all electric equipment within the<br />
European Union must be labeled with the CE conformity marking for electromagnetic compatibility<br />
(EMC).<br />
All modules of the HIMA <strong>system</strong> family "HIMax" are labeled with the CE conformity marking.<br />
When installing controllers in control cabinets and support frames, ensure proper and interference-free<br />
electrical installation in the vicinity of the controllers to prevent EMC problems.<br />
For instance, do not lay power lines together with 24 V feed lines.<br />
Earthing the HIMA Controllers<br />
While also taking the EMC aspects into account, implement the following earthing measures<br />
to ensure the safe function of HIMA controllers.<br />
Earthing Connections<br />
All tangible surfaces of the HIMax components (e.g., base plate), except for pluggable<br />
modules, are electrically conductive (ESD protection, ESD = electrostatic discharge). Use<br />
cage nuts with claw fasteners to ensure the safe electrical connection of components such<br />
as base plates and the control cabinet. The claw fasteners penetrate the pivoting frame surface<br />
and ensure safe contact making. The screws and flat washers used are made of<br />
stainless steel to prevent electric corrosion .<br />
The components of the cabinet frame are welded together and function as electrical<br />
conductive construction element. Short earthing straps with cross-sections of 16 mm² or<br />
25 mm² are used to conductively connect the pivoting frames, door, mounting rails and, optionally,<br />
mounting plates to the cabinet frame. The earthing straps are covered with a yellow-green<br />
marking hose .The earthing straps are covered with a yellow-green marking<br />
hose .<br />
HI 801 001 E Rev. 3.00 Page 79 of 104
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