Bosch Appliances Home Security System 3.5 User Manual

Bosch Security Systems | 2011-02

Praesideo 3.5 | Installation and User Instructions | 3 | Control Equipment

en | 110

The audio expander has 5 control outputs. The control 
outputs can be used to send signals to third party 
equipment to trigger actions. Each control output 
connection has three pins (see figure 6.7).

The common (C) pin of the control output should 
always be connected. Whether the other pin that is 
connected is the normally closed (NC) or normally 
open (NO) depends on which action that take place 
when the control output is active (see table 6.4).

In the configuration, a purpose must be attached to the 
control output that indicates the action to be taken when 
it becomes active (see table 43.6).

6.4 Installation

The audio expander is suitable for either table-top or 
19-inch rack installation. Four feet (for table-top use) 
and two brackets (for rack installation) are supplied.

Connection

Abbr.

Description

Normally 

closed

NC

By default, the NC 

contact is connected 

with common contact 

C. When the output is 

activated, the NC 

contact is opened.

Normally 

open

NO

By default, the NO 

contact is not 

connected with 

common contact C. 

When the output is 

activated, the NO 

contact is closed.

C NC NO C NC NO C NC NO C NC NO C NC NO

Control Out

1

2

3

4

5

Note
The center bracket positions can be used to 

secure the unit on a table or shelf. They can also 

be used to install the unit vertically to a wall.

Caution
When mounting the brackets to the unit, use the 

screws that are supplied with the brackets. 

Screws with a length of >10 mm may touch or 

damage internal parts of the unit.