Bosch 50 User Manual

DCN Voting Units 

 Installation and User Instructions 

en | 6 

 

Bosch Security Systems B.V. | June 2004 | 9922 141 70611 

 

 

 

 
To change the voting button order: 
1 

Unscrew the front plate of the voting unit. Keep 
the two screws. 

2 

Remove the three buttons in the middle of the 
unit by squeezing the snap fingers of the buttons 
with a pair of tweezers. 

3 

Insert the buttons in the correct position. (see 

4 

Fasten the PCB back to the front plate. 

5 

Set the button order jumper on position 1 (see 
Figure 2.7). 

 

 i 

   Note 

Do not touch the electronics, in order to 
prevent damage by static discharge. 

 
 

 

 

    

 

 

 
The default position of the button order jumper is: 
•  LBB 4141/00: position 2 
•  LBB 4141/50: position 1 
 

 i 

   Note 

The voting unit can not be used for audience 
response voting, multiple choice voting, opinion 
poll voting and rating, when the button order 
jumper is set to position 1. 

2.4 Mounting 

The LBB 4141/00 and LBB 4141/50 voting units can 
be snap-mounted and block mounted. 

2.4.1 Snap Mounting 

The snap-mounting method is used to install flush-
mounting units in panels with a thickness of 2 mm. 
This method uses the ‘click-to-fit’ mechanism to secure 
the units in cutouts in tabletops or the armrest of seats. 
See Figure 2.1 for a close up of the click-to-fit 
mechanism and 

 for the dimensions for snap 

mounting. 
 
 
 
 
 
 
 
 
 

 

 

2.4.2 Block Mounting 

The block-mounting method is used to install flush-
mounting units in surroundings of more than 2 mm. 
This method uses couple pieces (LBB 4127/00) to flush 
mount the voting units in cutouts in tabletops, metal 
plates or armrests of seats. The end caps (LBB 4125/00) 
cover the coupling pieces and complete the attractive 
design.

 

 

See Figure 2.10 for the procedure for block mounting a 
voting unit and 

 for the dimensions for block 

. .