232FLST

232FLST Datasheet

232FLST-0812-1/3

Part	Datasheet
232FLST	232FLST (pdf)

PDF Datasheet Preview
B&B ELECTRONICS 232FLST-0812-1/3 2002 by B&B Electronics. All rights reserved. Model 232FLST Port-Powered RS-232 Fiber Optic Modem with Handshake Support The 232FLST allows any two pieces of RS-232 asynchronous serial equipment to communicate full duplex over two multi-mode fibers. Typical distances up to miles 4 Km are possible with no external power required. The 232FLST supports both data signals at up to Kbps as well as the RTS/CTS handshake lines. This means the 232FLST can replace short haul modems and isolators when connecting remote devices, while providing the EMI/RFI and transient immunity of optical fiber. RS-232 connections are provided on the same DB-25 female connector, while the multi-mode fiber is connected via two ST connectors. The unit is port powered by the RS-232 Transmit Data and handshake lines. When handshake lines are not available, or when using a low power RS-232 port, the 232FLST can be powered by an external 12VDC supply, drawing 50 mA max. RS-232 Connections Connection of the 232FLST is simple and straightforward. The DB-25 female serial connector is used for connecting the RS-232 data and handshake signals. The connector is pinned as a DCE device input on Pin 2 and output on Pin This means that a straight through cable can be used from your DB-25 port from any DTE device such as a PC or terminal. A standard 9 to 25-pin adapter can be used in cases where the serial port on the DTE device is a DB-9. For connecting to modems or other DCE devices, a null modem cable or adapter that swaps pins 2 & 3 is needed. Care should be taken that any output handshake lines be connected through to the 232FLST to power the unit. See Figure 1 for connection diagrams to 9 pin and 25 pin DTE and DCE devices. DB25 DTE Device Figure 1 RS-232Connection Diagrams 232FLST DB25 DB25 DCE Device 232FLST DB25 POWER Signal GND 7 RTS 5 CTS CTS 4 RTS POWER or DCD 20 DTR 7 Signal GND 7 DB9 DTE Device 232FLST DB25 POWER Signal GND 7 DB9 DCE Device 232FLST DB25 RD 2 TD RTS 5 CTS CTS 4 RTS POWER DCD 20 DTR Signal GND 7 PRODUCT INFORMATION International Office 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104 European Office Westlink Commercial Park Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445 B&B ELECTRONICS 232FLST-0812-2/3 2002 by B&B Electronics. All rights reserved. Fiber Optic Connections The 232FLST uses a separate LED emitter and photo-detector operating at 820 nm wavelength. Connections to the emitter and detector are on ST type connectors. Almost any multi-mode glass fiber size can be used including 50/125 m, m, 100/140 m, and 200 m. Two fibers are required between the two modems, one for data in each direction.

PDF Datasheet Preview

B&B ELECTRONICS
232FLST-0812-1/3
2002 by B&B Electronics. All rights reserved.

Model 232FLST

Port-Powered RS-232 Fiber Optic Modem with Handshake Support

The 232FLST allows any two pieces of RS-232 asynchronous serial equipment to communicate full duplex over two multi-mode fibers. Typical distances up to miles 4 Km are possible with no external power required. The 232FLST supports both data signals at up to Kbps as well as the RTS/CTS handshake lines. This means the 232FLST can replace short haul modems and isolators when connecting remote devices, while providing the EMI/RFI and transient immunity of optical fiber.

RS-232 connections are provided on the same DB-25 female connector, while the multi-mode fiber is connected via two ST connectors. The unit is port powered by the RS-232 Transmit Data and handshake lines. When handshake lines are not available, or when using a low power RS-232 port, the 232FLST can be powered by an external 12VDC supply, drawing 50 mA max.

RS-232 Connections

Connection of the 232FLST is simple and straightforward. The DB-25 female serial connector is used for connecting the RS-232 data and handshake signals. The connector is pinned as a DCE device input on Pin 2 and output on Pin This means that a straight through cable can be used from your DB-25 port from any DTE device such as a PC or terminal. A standard 9 to 25-pin adapter can be used in cases where the serial port on the DTE device is a DB-9. For connecting to modems or other DCE devices, a null modem cable or adapter that swaps pins 2 & 3 is needed. Care should be taken that any output handshake lines be connected through to the 232FLST to power the unit. See Figure 1 for connection diagrams to 9 pin and 25 pin DTE and DCE devices.

DB25 DTE Device

Figure 1 RS-232Connection Diagrams
232FLST DB25

DB25 DCE Device
232FLST DB25

POWER

Signal GND 7

RTS 5 CTS

CTS 4 RTS

POWER
or DCD
20 DTR
7 Signal GND 7

DB9 DTE Device
232FLST DB25

POWER

Signal GND 7

DB9 DCE Device
232FLST DB25

RD 2 TD

RTS 5 CTS

CTS 4 RTS

POWER

DCD 20 DTR

Signal GND 7

PRODUCT INFORMATION

International Office 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104 European Office Westlink Commercial Park Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445

B&B ELECTRONICS
232FLST-0812-2/3
2002 by B&B Electronics. All rights reserved.

Fiber Optic Connections

The 232FLST uses a separate LED emitter and photo-detector operating at 820 nm wavelength. Connections to the emitter and detector are on ST type connectors. Almost any multi-mode glass fiber size can be used including 50/125 m, m, 100/140 m, and 200 m. Two fibers are required between the two modems, one for data in each direction.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived 232FLST Datasheet file may be downloaded here without warranties.

Datasheet ID: 232FLST 521475