Installation
140
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
Tab. 66 Connections for the options card ODAB
Connection for door intercom with 600 Ohm speech path
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 connection.
IO port Socket Function Value
– Ta, Tb Floating connection (without power supply)
for 2-wire TFE signal
600
– Ta’, Tb’ Non-floating connection (with power sup-
ply) for 2-wire TFE signal
24 V / 25 mA / 600
1 KT 1, 2 Bell input 40 V / 4 mA
2 TS1, 2 Floating contact, ”Switch on / off power sup-
ply for door intercom system”
max. 24 VAC, 30 VDC, 1 A
3 TO1, 2 Floating contact, "Door release" max. 24 VAC, 30 VDC, 1 A
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