▄ Solution 1: RS485 is an interface widely used in signal communication at present, which is widely used in industrial automatic control, network communication, security monitoring, and other fields.
Using this program, the line can withstand large surges, fast pulse groups, and static electricity. The program uses a triple protection mode.
It can meet the standard requirements of ITU-T K.21.

Device selection reference:
GDT: 2R090TA-5/8
PPTC: JK250-145U
TVS: SMBJ6.0CA