4.2.7.6 Connecting a Doorphone
2 doorphone types are available, depending on the operating mode used:
• Type A: relay-controlled doorphones (e.g. NPTT)
• Type  B: doorphones controlled  by  MF Q23 signals  requiring  an SLI interface  (e.g.  TELEMINI  and
UNIVERSAL DOORPHONE)
The  doorphone  interface  comprises  an  intercom  and  an  optional  latch  powered  by  the  mains  supply
through a SELV (Safety Extra Low Voltage) transformer.
It  is  connected  via  the  DOORPHA  and  DOORPHB  outputs  (control  contacts  open  when  idle)  of  the
DOORPHONE connector.
4.2.7.6.1 Connecting a NPTT Doorphone
BUSINESS PROCESSING UNIT
LAN
LAN
CONFIG.
DOORPHONEAUDIO MODULE
MODULE 1
FAN POWER
CPU
MODULE 2
AUX
ISDN T0 1 ISDN T0 2
SLI1/2 &
Mini-MIX
220V
DoorPhB1
DoorPhB2
DoorPhA1
DoorPhA2
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
ANALOG INTERFACES
SLI16-2
A
Distribution panel
To door
lock keeper
DOORPHONE
PowerCPU EE
• A single doorphone with doorstrike may be connected to the system.
• The system also allows for the connection of 2 doorphones without latch.
4.2.7.6.2 Connecting a Telemini and Universal Doorphone
These doorphones require the use of a Z station interface.
• Several  of  these  doorphones  can  be  connected  to  the  system;  the  limit  is  determined  by  the
maximum number of analog stations the system can support.
Chapter 
4
Installation and Cabling
3EH21123USAA - Ed. 01  - April 2017 - Installation Manual 57/207