SPIDER Automation™ 【USB to RS232 Converter】 High-Speed Serial DB9 male Cable 1-port Adapter, CE FCC RoHS Certified, Based on (industrial FTDI Chipset), 1 meter cable length | by SPIDER Automation : Amazon.in:
Maximum distance using a serial port - General Electronics - Arduino Forum
RS-232 Bus Description and EIA232 Pinout
Fundamentals of RS-232 Serial Communications | Analog Devices
Connecting to Old Instruments Having +-12V RS232 Voltage Levels - NI Community
Fundamentals of RS-232 Serial Communications | Analog Devices
DELOCK 63934: Extender RS232, RJ45 > RS232, RJ45, ESD at reichelt elektronik