Dear colleagues,
I want to know if the serial ports (Com1 to Com4) of the CR1000 datalogger could accept a LVTTL 3.3V signal using the "SerialOpen" command with a TTL configuration (Code 19).
Thank you,
Francisco.
Not reliably I am afraid as the minimum high state voltage quoted for the control ports of our current loggers is 3.8V.
They will often accept a slightly lower voltage than that as being high but it is not guaranteed.
You might try using an external signal conditioner.
A quick search at B&B resulted in
http://www.bb-elec.com/Products/Datasheets/232LPTTLxx-0712ds.pdf