138
C
ABLING INTERFACES
CHAPTER 4 INSTALLATION
NOTE:
• Only the FXS interfaces on the mainboard of the SMB Controller (FXS1...FXS6) support this feature.
FXS interfaces on the card ETAB4 cannot be used.
• The customer is responsible for all copyright matters relating to any music playback.
FXS mode: Control output
If an FXS interface is configured as a control output, the signal can be used to control external devices or
equipment (e.g. heating, alarm or outdoor lighting systems).
The no-load voltage is 24 VDC; the current is limited to 25 mA. A connected relay must be of the type 24
VDC and must not draw more than 300 mW in power.
There are no special requirements for the cables.
CAUTION: Control outputs must have a floating connection.
Figure 4.46: Connection for FXS mode: Control output
[1] The diode is necessary, in order to avoid unwanted voltages at the control output during the the
start-up phase of the communication server.
Figure 4.47: Connection for FXS mode: Control output
Table 4.31:Technical data for FXS mode: External audio source
Input impedance approx. 15 kW
Input level configurable
Input circuit asymmetrical
Output resistance audio source 1 kW
Installation cable NF cable screened (required for low levels)
To Next Page
Loading...
