User guide
Installing the Equipment   
Warnings! 
This unit must be correctly earthed through the molded plug supplied; if the local 
mains supply does not have an earth conductor do not connect the unit. Contact 
Customer Services for advice. 
Before connecting the unit to the supply, check the supply requirements in Annex B, 
Technical Specification. 
The unit has a Technical Earth terminal (marked with   ) located adjacent to the 
rear-panel mains inputs. Its use is recommended. This is NOT a Protective earth for 
electric shock protection. The terminal is provided to: 
•  Ensure all equipment chassis fixed within a rack are at the same Technical 
Earth potential. To do this, connect a wire between the Technical earth terminal 
and a suitable point on the rack. 
•  Eliminate the migration of stray charges when connecting between equipment. 
Figure 2.2  Location of the Technical Earth 
Warning! 
If the terminal screw has to be replaced, use the following: 
M3 x 12 mm long Pozidrive Panhead. 
Using a longer screw may cause a safety hazard. 
Technical Earth – 
M3 x 12 mm 
  2/1553-FGC 101 1019 Uen A 
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