RD320-OFR Serial RS232/RS422/RS485 to single mode fiber optic media converter, multipoint & fault tolerant

The optical fibre still offers other advantages : use without risk in an explosive environment, no EMC emission, no ground loops, immunity against lightning and high voltage environments, they are finally lighter, less cumbersome, inert and corrosion resistant ...

Plug & Play

The RD320-OFR device features a self configuration mechanism based on a CPLD component freed you from the tiresome operation which consist in the serial parameters setup, product is "Plug & Play".

Security & fault tolerance (redundancy)

RD320-OFR features in standard a built-in system to control the fiber integrity, it reports automatically any failure with an error LED and also setup a relay contact (MOSFET) to activate any external safety device.

The RD320-OFR device features two pairs of fiber, the second one can be used to provide the redundancy of the first one, an "OR" mechanism makes it possible to receive data from any of those pairs in case of failure or fiber breakdown.

Technical chracteristics overview Serial link Optic fiber 3 in 1 interface : RS232, RS422 & RS485 Pluggable solderless screw terminal field Speed up to 500 Kbps Serial link parameter self configuration "Plug & Play" RS232 signals : TxD, RxD, GND RS422 signals : TxA, RxA, TxB, RxB, GND RS485 signals: TRxA, TRxB, GND Configurable polarization & terminating resistors (mini-switches) for RS422/RS485 Automatic RS485 line turn-around, software independent Half-duplex & Full-duplex modes support Serial protocols : The RD320-OFR device supports any kind of communication protocols (Modbus, Unitelway, Profibus, DH+, ASCII or binary serial protocols ...) 15 KV ESD protection and HF filtering Single mode optic fiber 9/125 µm fibers support SC type connectors Transmission up to 20 Km on a 9/125 µm fiber at 25°C Wave lenght : 1310 nm Power budget : 16 dB (typical) Reliable communication without any error even in case of significant EMI/RFI interferences Bi-directionnal transmission Topologies : Point to point, simple ring, single-master & dual-master buses, redundant fiber ring, dual ring with dual master, dual point to point & star network Infinite galvanic isolation through the optic fiber Fiber breakdown self diagnostic, failure is reported on a LED and a relay contact (MOSFET) is activated Power supply, signalling and other characteristics +9VDC to +36VDC wide DC power range, screw-in terminal Power consumption : 3.9W (maximum) LED signalling for TxD & RxD on both copper and fiber optic side Fiber breakdown self diagnostic, failure report on a LED and relay contact (MOSFET) activation Dimensions & Weight : 107 mm (L) x 88 mm (W) x 25 mm (H), 260 g Robust & compact metal case, CE industrial grade Case and 35 mm Din Rail mounting

Point to Point topology This configuration enables to control a single equipment installed in a very polluted or distant area. The optical line is totally insensitive to EMI/RFI perturbations. Simple ring topology This topology enables to build a simple ring whereas the master equipment is installed in the middle. Single master bus topology Each media converter device enables to connect to the network one or more slaves peripherals controlled by the master which governs exchanges using addressing sequences. All the slaves equipments receive data transmitted by the master and answer are then received only by the master. Dual master bus topology By using this configuration, data transmitted by the "A" master are received by all the slave equipments and by the "B" master (backup station) as well. The answers from slaves are received by all the slaves and by masters "A" & "B" as well. Such configuration brings security to the application as the "B" master warrants the system to work even in case of master "A" failure or fiber breakdown. Both "A" & "B" masters can be a single equipment with two independant serial ports. Redundant ring (fault tolerant) A single ring is used in this configuration but data are transmitted simultaneously on the two rings, this is a single master topology. The master doesn't retransmit the data he receive in order to avoid infinite data loop. In case of fiber breakdown, the equipments will still continue to receive data on the only line. Dual ring & dual master topology This topology should be used when an equipment needs to answer to different masters located on distinct networks. The RD300-OFR device can also be used as a simple repeater or as a fiber optic converter to be compatible with other equipments. Dual point to point network This topology should be used when EMI/RFI perturbations concern only a part of the whole installation. Redundancy provides a double security for the sensitive link. Moreover, any fiber failure is reported on a LED and a relay contact (MOSFET) in activated. Star topology The device works as an RS485 network repeater and makes it possible also a star topology in a polluted environment.

Reference to order:

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