Product Id: 19474071
Description: Black Box RS-232<->TTL Converter - Serial adapter - RS-232 - serial RS-232 (TTL)
Mfr Part #: IC1157A
MSRP: $86.85RS-232< - >TTL Converters enable you to use the RS-232 interface on your PC to control Transistor Logic (TTL) devices. The converters are fast, too. They support serial data rates of up to 115 kbps.
Just plug 'em in and you're ready to go. The tiny converters take almost no space at all, require no bulky separate power supply, and can be used with virtually any micro controller or programmable logic controller that supports TTL.
These units also convert two channels (TX and RX) in each direction from RS-232 to TTL.