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DIN Mount Fiber Optic Converter CE CE
Model FOSTCDR
Document No. FOSTCDR2999
This product Designed and Manufactured
In Ottawa, Illinois USA
of domestic and imported parts by
B&B Electronics Mfg. Co. Inc.
707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350 USA
Phone (815) 433-5100 -- General Fax (815) 433-5105
Home Page: www.bb-elec.com
Sales e-mail: sales@bb-elec.com -- Fax (815) 433-5109
Technical Support e-mail: support@bb.elec.com -- Fax (815) 433-5104
© Copyright 1999 B&B Ele
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Table of Contents DESCRIPTION.................................................................................................1 RS-232 CONNECTIONS ...............................................................................1 RS-422 & RS-485 CONNECTIONS............................................................1 FIBER OPTIC CONNECTIONS ...................................................................2 DIP-SWITCH SETUP..........................................................................
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Description The FOSTCDR is designed to provide the most versatile connection possible between any asynchronous serial equipment using Fiber Optic cable. It allows any two pieces of asynchronous serial equipment to communicate full or half-duplex over two fibers at typical distances up to 2.5 miles. The converter can also be set up in "Repeater" mode to create a multi-drop master/slave configuration, allowing one serial device to talk to multiple slave devices around a fiber ring. The DIN rail
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receiver of the FOSTCDR must be connected together by tying terminal blocks (L) and (H) together and (G) and (K) together. This allows the FOSTCDR to communicate half-duplex over the same pair. Refer to Figure 1 for connection diagrams to your RS-422 or RS-485 equipment. Figure 1: RS-422/485 Connection Diagrams FOSTCDR 422/485 4W Device 485 2 Wire Device FOSTCDR (K) RD A (K) RD A TD A (-) Data A (-) TD B (+) (L) RD B (L) RD B RD A (-) (G) TD A (G) TD A RD B (+) (H) TD B Data B (+) (H) TD B GND
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RX FOSTCDR SW1:6 = ON TX SLAVE RX FOSTCDR SW1:6 = ON TX SLAVE RX FOSTCDR SW1:6 = ON TX SLAVE The most important consideration in planning the fiber optic link is the “power budget” of the fiber modem. This value represents 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 includes line attenuation as well as connector loss. For the FOSTCDR the typical connector to connector power budget is 12.1 dB. Because 62
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the driver could be disabled before transmission is complete, resulting in data corruption. If the time is set too long, the RS-485 device may respond before the RS-422/485 driver in the FOSTCDR is disabled, corrupting this response. We recommend that the timeout be set for approximately one character time or longer. The character times for several different baud rates are selectable on switch positions 1 through 5. If you need a different timeout than what is provided, R10 can be removed an
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Positions 7 and 8 of SW1 determine when the RS-422/485 driver and receiver are enabled. Position 7 controls the driver and Position 8 controls the receiver. For RS-422 operation, set both switches to the “Off” position. For multi-drop RS-485 four-wire systems, position 7 should be “On” and position 8 should be “Off.” This allows the receiver to be enabled all of the time and eliminates some possible timing problems. For RS-485 two-wire systems, both switches should be in the “On” position.
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Specifications Transmission Line: Dual multi-mode optical cable Point to Point Transmission: Asynchronous, half or full-duplex Multi-Drop Transmission: Asynch., half duplex, master/slave, ring Interfaces: RS-232, RS-422, or RS-485 Data Rates: 0 to 115.2K bps RS-232; 0 to 460K bps RS-422/485 Typical Range: Up to 2.5 miles (4.0 km) on multi-mode glass fiber Coupled Power Budget: 12.1 dB Optic Wavelength: 820 nm Connectors: Terminal blocks/serial connection, ST connectors/fiber Power Supply
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FOSTCDR Diagram Figure 3: FOSTCDR Circuit Diagram FOSTCDR2999 Manual 7 B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
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FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFACE STATEMENT Class A Equipment This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in acc
