Mitel 430 System Manual page 140

Installation
Tab. 66 Connections for the options card ODAB
IO port Socket
– Ta, Tb
– Ta', Tb'
1 KT 1, 2
2 TS1, 2
3 TO1, 2
Connection for door intercom with 600 Ohm speech path
B
A
ODAB
Fig. 64 Schematic circuit diagram
Points to be observed for the connection as indicated in Fig. 64:
• The door intercom system requires an external power supply.
• The signal circuit does not require a power supply.
• The speech path (DC-free) is connected to Ta and Tb.
• The door intercom system is switched on via the TS contact output.
• The door release is actuated via the TO contact output.
Warning
– The bell key switch does not require an external power supply, but must have a floating con-
nection.
140
Function
Floating connection (without power supply) for
2-wire TFE signal
Non-floating connection (with power supply)
for 2-wire TFE signal
Bell input
Floating contact, "Switch on / off power supply
for door intercom system"
Floating contact, "Door release"
Door intercom (TFE)
Tb
Ta'
Tb'
Ta
TS1
TS2
TO1
TO2
KT1
KT2
Speech path
Speech path
power supply
Door
115/230 VAC
Bell key switch must
be floating
Value
600 Ω
24 V / 25 mA / 600 Ω
40 V / 4 mA
max. 24 VAC, 30 VDC, 1 A
max. 24 VAC, 30 VDC, 1 A
Door loudspeaker (TL)
Mitel 415/430 as of R4.1
syd-0580/1.2 – R4.1 – 08.2016