The overview of 232HESP

The Model 232HESP is designed to help protect against lightning strikes, power surges, and other types of voltage disturbances. Five RS-232 signals on terminal blocks are supported with a clamping voltage of approximately 15 volts. The 232HESP offers three stages of protection starting with a gas discharge tube followed by a series resistor and finally a Transient Voltage Suppresser (TVS). In order for a surge protector to work properly it is important to have a good connection to earth ground. The 232HESP offers two terminal posts and two metal mounting brackets that provide a good ground connection for the user. The 232HESP has been tested to two specifications at 6 kilovolts, IEC 1000-4-5: 1995 “Surge Immunity Test” and IEEE C62.41-1991 “IEEE Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits”. To ensure the best protection of your equipment some simple connection guidelines should be followed.

The “RS” stands for “Recommended Standard.” That being the case, it was always rather loose. RS-232 is capable of operating at data rates up to 20 Kbps and can push data about 50 ft. The absolute maximum data rate is difficult to nail down due the differences in the transmission line and cable length. It is possible to operate at some pretty high data rates if the distance is short. 

If you want to know more RS-232, you can come to Kynix.