User Guide

RS232 to TTL converter board DCE with Female DB9
3.3V to 5V logic level / 250kbps (KIT-0100)
CTS
RTS
CTS
TX
RX
GND
VCC
TTL
CMOS
Logic
3V to 5.5V
(Match TTL/CMOS
Logic voltage level)
DB9 (RS232) Pin
8
7
3
2
5
Connection Diagram
RTS / CTS routing options
RTS
CTS
RTS
CTS
TTL RS232
RTS
CTS
RTS
CTS
TTL RS232
RTS
CTS
RTS
CTS
TTL RS232
No RTS / CTS signals RTS / CTS loopback RTS / CTS HW handshake
Jumper
NKCelectronics.com
Signal Direction Input/Output
RX DCE-DTE Output
TX DTE-DCE Input
CTS DCE-DTE Output
RTS DTE-DCE Input