Electronic_DCL

Teletype Electronic

Double Current Loop (Doppelstrom)

Rare teletypes (like Siemens T25, T36) use 'Doppelstrom' for transmitting data as it is used inside 'VST'.

For this type of machines a voltage source with plus 60V and minus 60V is needed.

Status: NOT tested

Components

Opto coupler Receiver:

• PC817, LTV817 (Vce=35, CTR>50%)
• any opto coupler with CRT>50%

Opto coupler Transmitter:

• AQW210 (Double AC SSR, Vl=350V, Il=120mA)