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c) 4 Wire Data Protocal unit Type I/II

c) Data sheet – 4 wire data protocol 

VM-RS 485 has been designed to protect all versions of RS 485. It can be used for protection of RS 422 and V.11 protocol as well.

  • Category IEC / EN: D1/C1/C2/C3
  • Mode of protection: Longitudinal, Transverse
  • Coarse Protection: 2 x 3 terminal GDT, 2 x 2 terminal GDT 
  • Nominal operating voltage: Un: 5VDC
  • Max. operating voltage: Uc: 6VDC
  • Serial resistance: 1.7 – 1.9Ω per line
  • Frequency range: < 1Mhz
  • Surge Discharge Ratings: In: 20kA; Iimp 10/350 :  2.5kA 
  • Series load current: 500mA
  • Enclosure: DIN 43880 2TE, DIN rail mount
  • Terminals: Stranded 2 x 2.5mm2
  • Housing: 16 terminal compact design
  • Complies with: IEC/EN 61643-21