Unruh wrote: [] > Yes, but that same manual says that the voltage for the 18PC version > is 8-30V. It says nothing about the internal voltage being the 4.5 to > 5.5 V. > And the 18PC and the 18LVC are different units with different inputs > and > outputs. > The PC is also the one with serial port output and the serial port > standard > says that the voltage is -12 to 12V on the serial pins. Now, many > serial cards > do accept 0-5V (TTL) which is why the 18LVC works on many serial ports > without a voltage converter, but that is out of standard. Does the > 18PC follow the standard? The manual does not say. Ie, there is > NOTHING in the manual which > would allow one to conclude that the actual voltage delivered to the > unit > is 5V rather than the 8-30 V that the manual does say that the unit > requires. You might be right that a) it is the lighter adapter than > lowers > the voltage to 5V, and b) that the output does not follow the serial > port > standard of -12 to 12V, but I would like something other than your > speculations to go by.
Bill, Section 1.4.2 of the manual says that the RS-232 levels sent are 0..+5V for the PC version, and from 0..Vcc for the LVC version, where Vcc is the supply voltage. I would be surprised if the internal electronics differed significantly between the PC and the LVC. Cheers, David _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
