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RS-232 or TTL levels in Turbo Motion

 
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drazvan



Joined: 12 Oct 2009
Posts: 5
PostPosted: Mon Oct 12, 2009 1:33 pm    Post subject: RS-232 or TTL levels in Turbo Motion Reply with quote
Hello everyone,

I'm trying to figure out a way to interface a SIM card with a custom controller box (a small embedded computer) that has a TTL-level UART (serial port). As far as I understand, the TM2 has an RS-232 port that could be used for this. But I'm not sure if the voltage levels are the same.

RS-232 could be +12V/-12V and in this case I will fry our 3.3V TTL-level serial. Does anyone know what voltage levels are used on the RS-232 port of the TM/TM2?

Thank you,
Razvan

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Razvan Dragomirescu
Chief Technology Officer
Cayenne Graphics SRL
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pz
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PostPosted: Wed Oct 14, 2009 2:06 pm    Post subject: Reply with quote
It's +-12V.
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