The 8937-HN Redundant Link Fibre Optic Module converts single buses and redundant dual buses to each other. Either a single cable bus can be converted to a redundant Profibus DP bus, or a redundant Profibus DP bus can be converted to a single cable bus, RLm01 fibre optic module dip switches to set the rate or the rate of adaptive optional. It supports 10 common rates of Profibus DP bus.

8937-HN fibre optic module can be placed directly after the Profibus DP master, the single cable bus into a redundant bus; can also be placed in the slave will be redundant bus into a non-redundant cable, at the same time, with optocoupler isolation, to reduce interference and other properties. Fiber optic module is industrial grade design, IP30 protection level, wave pattern aluminium reinforced chassis, 35mm rail mounting, DC (9-36) V wide power input, with relay alarm output, dual power supply redundancy and isolation protection and other advantages.

Features:
* Support the predetermined communication rate in the standard specification.
* Supports dip switches to manually set all the standard rates or rate adaptive (all electrical interfaces must be the same rate).
* 6 dual-colour LED status indicators, power failure relay output alarm.
* 4000V lightning protection, 1.5 A overcurrent, 600W surge protection for electrical interface. Industrial grade design, EMC test certification.
* DC9-36V wide redundant dual power supply, DC1500V power isolation, reverse connection protection.
* IP30 protection level, wave pattern aluminium reinforced chassis, using standard industrial 35mm rail mounting.