PRODUCT INFORMATION B&B ELECTRONICS. Port-Powered RS-232 Fiber Optic Modem with Handshake Support. Model 9PFLST. Description. RS-232 Connections

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1 -01-1/ 00 by B&B Electronics. All rights reserved. Model Port-Powered RS- Fiber Optic Modem with Handshake Support Description The allows any two pieces of RS- asynchronous serial equipment to communicate full-duplex over two multi-mode fibers. Typical distances up to. miles ( km) are possible with no external power required. The supports both data signals at up to 11. kbps as well as the / handshake lines. This means the can replace short haul modems and isolators when connecting remote devices, while providing the EMI/RFI and transient immunity of optical fiber. RS- connections are provided on the same DB9 female connector, while the multi-mode fiber is connected via two ST connectors. The unit is port powered by the RS- Transmit Data and handshake lines. When handshake lines are not available, or when using a low power RS- port, the can be powered by an external 1VDC supply, drawing 0 ma max. RS- Connections Connection of the is simple and straightforward. The DB9 female serial connector is used for connecting the RS- data and handshake signals. The connector is pinned as a DCE device (input on Pin and output on Pin.) This means that a straight through cable can be used from your DB9 port from any DTE device such as a PC or terminal. For connecting to modems or other DCE devices, a null modem cable or adapter that swaps pins & is needed. Care should be taken that any output handshake lines be connected through to the to power the unit. See Figure 1 for connection diagrams to 9 pin and pin DTE and DCE devices. Figure 1: RS- Connection Diagrams DB DTE Device DB DCE Device () () () () 0 DTR 0 DSR or DCD (DTR) DB9 DTE Device DB9 DCE Device () () () () 1 DTR 1 DSR or DCD (DTR) International Office: 0 Dayton Road PO Box 100 Ottawa, IL 10 USA Fax -10 European Office: Westlink Commercial Park Oranmore Co. Galway Ireland Fax

2 -01-/ 00 by B&B Electronics. All rights reserved. Fiber Optic Connections The uses a separate LED emitter and photo-detector operating at 0 nm wavelength. Connections to the emitter and detector are on ST type connectors. Almost any multi-mode glass fiber size can be used including 0/1 m,./1 m, 100/10 m, and 00 m. Two fibers are required between the two modems, one for data in each direction. The most important consideration in planning the fiber optic link is the power budget of the fiber modem. This value tells you the amount of loss in db that can be present in the link between the two modems before the units fail to perform properly. This value will include line attenuation as well as connector loss. For the the typical connector-to-connector power budget is 1.1 db. Because./1 m cable typically has a line attenuation of db per km at 0 nm, the 1.1 db power budget translates into. miles ( km). This assumes no extra connectors or splices in the link. Each extra connection would typically add 0. db of loss, reducing the possible distance by 1 m ( ft.) Your actual loss should be measured before assuming distances. When the is used without external power, the power available to the Fiber Optic transmitter may be less than the typical value. The link should be tested with the in place with a variable attenuator to check the optical power budget of the whole system. Figure : Typical Setup RS- DEVICE TX RX Duplex Multimode Fiber RX TX RS- DEVICE Specifications Transmission Line: Transmission Mode: Interface: Signals: Data Rates: Typical Range: Coupled Power Budget: Optic Wavelength: Connectors: Power Supply: Optional External Power Supply: Dimensions: Dual multi-mode optical cable Asynchronous, half or full-duplex, point-to-point RS- Transmit Data, Receive Data, Request to Send, Clear to Send 0 to 11. kbps Up to. miles ( km) on multi-mode glass fiber 1.1 db 0 nm DB9 Female for serial connection, ST Connectors for fiber Port Powered from Transmit Data,, and DTR lines ma max.. x 1. x 1.0 in (10.9 x. x. cm) Manufacturer s Name: DECLARATION OF CONFORMITY B&B Electronics Manufacturing Company Manufacturer s Address: P.O. Box Dayton Road Ottawa, IL 10 USA Model Number: Description: Port-Powered Fiber Optic Modem Type: Light industrial ITE equipment Application of Council Directive: 9//EEC Standards: EN 0 EN EN 1000 (--, --, --, --, --, --, --11) Robert M. Paratore, Director of Engineering International Office: 0 Dayton Road PO Box 100 Ottawa, IL 10 USA Fax -10 European Office: Westlink Commercial Park Oranmore Co. Galway Ireland Fax

3 Figure : Circuit Diagram -01-/ 00 by B&B Electronics. All rights reserved. International Office: 0 Dayton Road PO Box 100 Ottawa, IL 10 USA Fax -10 European Office: Westlink Commercial Park Oranmore Co. Galway Ireland Fax

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