Connection Two-Wire - ASCOM Ascotel 2025 System Manual

7.5.5.2

Connection Two-wire

A
D
A
D
Fig. 4.69: Schematic circuit diagram for two-wire connection
1. Fit jumpers TFE1 and TFE2 for door intercom interface 1 and 2 in position 2D.
2. Do not connect AC and AC' (the interface signal circuit does not need a
power supply).
3. Connect the voice path (a/b, DC-free) to Ta and signal ground (SGND).
4. If needed connect the switches for telephone hands-free device to TS and TS'.
5. Connect the door opener to TO and TO'.
The interface volume control (Pot1 and Pot2) is not effective and the volume is set
on the door intercom system.
HBT_20321104_04/B0_en
-
4D
2D
haz1154aaenb0
ascom Ascotel 2025/2045/2065
Ta
+
LS
Ω
47
SGND
TS
TS'
TO
TO'
SON
SON'
Cabling Interfaces
Door opener
Bell
4.97