44  Design and specifications are subject to change without notice  01/2008 
 
6.2.3  Layout of control PCB inside control box 
 
 
Fig. 53  Control box inside (w/o SEL unit) 
 
- - -
NEKO unit (ED trip) 128 750  R1 equipment to left
Voltage converter 128 730  R2-R4  equipment to left
SU-control unit 128 700 equipment to right
- - -
Table 5  Layout of control PCBs inside the box w/o SEL 
 
 
 
Fig. 54  Control box inside (with SEL unit) 
 
NEKO unit (ED trip) 128 750  R1 equipment to right
Voltage converter 128 730  R2-R4  equipment to right
SU-control unit 128 700 equipment to left
SU-control unit 128 700 equipment to right
- - -
Table 6  Layout of control PCBs inside the box with SEL 
 
 
Attention: 
•  The isolation plates between the control boards and 
at the wall of the box have to be always present! 
•  In older systems it may be the control boards are in-
stalled 180° turned!  
6.2.4  Replacement of the control boards 
 
•  OPEN the breaker. 
•  Disconnect power supply, and pull out all the plugs 
from control box’s terminals. 
•  In case of NEKO control unit inside, wait 1 minute 
untill capacity will discharge. 
 
 
Fig. 55-1  Unscrew and remove all the plugs 
 
Fig. 55-2  Unscrew four bolts of the box cover 
 
Fig. 55-3  Carefully move down the box cover 
  1  2  3  4  5  6 
  1  2  3  4  5  6