Bosch d9412gv3 User Manual

D9412GV3/D7412GV3 | Operation and Installation Guide | 2.0  

Lightning Strikes 

. 

 

Bosch Security Systems, Inc. | 10/10 | F01U143070-03 

8

 

The control panels are designed to significantly 
reduce electromagnetic interference and malfunction 
generally caused by lightning.  

Any electronic system can be struck directly by 
lightning or be adversely affected by a lightning strike 
near the system. When lightning strikes, several 
things happen:   
  An electromagnetic wave spreads from the point 

of the strike inducing high voltages in nearby 
conductors. 

  The voltage changes substantially on electrical 

grounds near the lightning strike. 

  High voltages are induced in anything directly 

struck by lightning.   

The effects of a lightning strike can include Missing 
Trouble, Missing Alarm, or Point Bus Trouble events. 
Occasionally, Reboot and Watchdog events might be 
sent because the control panel tried to reset itself. 
Electronic systems, including control panels, cannot 
be completely immune to direct or indirect lightning 
strikes; however, some proven installation practices 
might greatly reduce the risk of undesirable affects. 

To minimize the risk of undesirable effects from 
lightning strikes on high risk installations that use a 
point-bus technology: 
  Do not run wiring outside the building. 

  If you must install the unit in a metal building, 

keep the wiring at least 0.61 m (2 ft) away from 
external metal surfaces. 

  Earth ground the unit correctly. Do not use an 

electrical ground or telephone ground. 

  Avoid running wires near telephone, data, or 

power lines inside a building. Historical evidence 
shows that locating control panel wiring at least 
0.61 m (2 ft) away from telephone, data, or power 
lines is successful at minimizing lightning 
damage. When your data lines must cross the 
path of AC or other wiring, cross the lines 
perpendicularly.