Do you want to operate light, door opener or burglar alarm system at the same time as pressing a (bell) button? Then the a/b switching module is the right choice. Up to six of these switching modules can be used on a TFS-Dialog 200/300/400 or TFS-Universal plus - all that is required is a two-wire cable.
|Instructions a/b Switching Module||V03 10/2020|
Note about qualified electrician complemented.
Note about door bell transformer complemented. Note about inflammable materials deleted.
Operating voltage: Values changed
Contact load capacity: Values changed
The COMpact 3000 analog/ISDN/VoIP PBXs don't feature an interface for FTZ-standard doorphones.
However, you can use analog doorphones such as our TFS-Dialog 20x/30x/universal plus. In addition, you can use the TSA - a / b use this converter can convert different doorphone to a / b port .