Profibus Ring Fiber Optic Modem

HFD-FO-PRO Series

Profibus Self-healing Ring Fiber Optic Modem

Product Description

The HFD series Profibus Multi-Drop Self-Healing Ring Transmission series products provide an optical self-healing ring network for Profibus data interfaces over two multimode or single mode optical fibers. The system offers maximum reliability as it can recover simultaneous faults or failures in two different locations and has contact closure outputs on each module to clearly indicate any fault location. The self-healing ring consists of two opposing data paths, ring A and ring B. Under normal operation only the primary path (ring A) is used for data transfer. If a fault is detected, the data is transferred to the secondary path (ring B) without interruption to the communications network.  

The series is available in wall mount, DIN rail or 2U chassis card.

Electromagnetic compatibility (EMC)
Limit class B (EN 55022)
EN 61000-4-2
EN 61000-4-3)
Burst: On power supply lines and shielded RS 485 bus lines: ± 2 kV (EN 61000-4-4)
Surge: Power lines: ± 1 kV symmetrical, Shielded RS 485 lines: ± 2 kV asymmetrical (EN 61000-4-5)

Product Features

• Point to point/Multi-drop/Redundant ring topologies 
• Multimode and single mode solutions
• Single or dual fiber solution 
• Single or dual power supply solution
• Wall mount, rack or chassis configurations
• 5 years warranty

Typical System Configuration