User guide
Doortello Business
Issue 1.00
Page 9
Further connectors
Anschlüsse Doortello Business Grundsystem
be assigned: 128 („handset“), 129 („key“),
130 („name“) und 131 („lamp“). Passive
modules, like information, spare or camera
modules don’t use any address.
For the Doortello Business BG the button
encoding module DB 15 is used. Each
module can connect up to 4 dry contact
buttons. Using the DB bus flat cable all
encoding modules are then connected to
the Doortello Business BG unit. As described
above with the chime button modules also
the encoding units are addressed using a DIP
switch, where at each button a decimal
address form 001 to 127 will be assigned.
Up to 32 encoding modules can be used,
where the last one can manage only a
maximum of three buttons. Limitation of the
address use are the same as described above
if not all buttons are used on one encoding
module.
Further information about chime button, dial
pad and encoding modules can be find on
the specific user guide of that products.
Chime buttons modules with DB bis cabling
Telephone line (A/B)
RS 485 serial interface (C/D)
Driver contact 1 (E/F)
Driver contact 2 (G/H)
External DC power supply (I/L)
Line impedance 600 Ohm
Line impedance Zr (TBR 21)
DB Bus
