Rdc lpu

Hii sir, I Wants to get the Information About the Lightning Protection for Isolated RS-232/422/485 Data Comm Circuits ?

[pawan]

The rdcLPU is especially designed for use with RobustDC's isolated products. One rdcLPU fully protects 2-wire RS-485 or 3-wire RS-232 circuits.

Key features include:
Up to 20kA impulse discharge (8/20us wave)
Self-resetting current limited to 250mA
Simplifies ground wire installation

Specification

Nominal Voltage: +/- 15 vdc (suitable for RS-232/422/485)
Nominal Current : 250mA (normal maximum for RS-485)
Series Resistence : 6.5 ohm (at 25 C with minimum current)
Impulse Discharge: 20kA (wave form 8/20us per IEC 801.5)
Course Protection : Ceramic Gas Discharge Tube
Fine Protection: High-Speed Transient Suppressor Diode
Current Limiting : Positive Temperature Coefficient Thermistor
Capacative Effect: adds approx 4000 pF per wire
Supportted Speeds : 300 to 38kbps



Lightning Protection for Isolated RS-232/422/485 Data Comm Circuits