RAD FOM-5S/F/ST

FOM-5S, 6S Synchronous Fiber Optic Modems FEATURES • Synchronous transmission up to 19.2 kbps • Transmission range up to 4.5 km (2.7 mi) regardless of data rate • Full- or half-duplex • Transfers one control signal end-to-end • No external power required • Plugs directly into the V.24/RS-232-C terminal connector • Compact, lightweight, easy to install • LED indicator for carrier detect APPLICATION A pair of FOM-5S or FOM-6S modems ensure secure data transmission over fiber optic cable at distances up to 3 km (1.8 mi). DESCRIPTION • The FOM-5S and FOM-6S fiber optic modems are used for local data distribution, to connect full- or half-duplex synchronous computers and terminals. A pair of modems ensures integrity of data transmission over fiber optic cable at distances up to 3 km (1.8 mi). • FOM-5S is a smaller version of FOM-6S, with all the same features. FOM-6S is provided in a plastic enclosure. An optional metal case can be ordered to reduce radiated emission (see Ordering). • A LED indicator monitors carrier detection on FOM-5S and FOM-6S models that are enclosed in a plastic case. • Transmit timing can be taken from three alternative sources: � Internal oscillator � External clock from the DTE via pin 24 � Loopback clock derived from the receive signal. • To transfer a control signal end-to-end, the carrier can be strapped for either continuous or switched operation and controlled by the RTS signal. • The delay between Request-to-Send and Clear-to-Send can be set to either 7 or 53 msec. • FOM-5S and FOM-6S operate without connection to the mains supply, by using ultra-low power from the data and control signals. • FOM-5S and FOM-6S provide all the advantages of a fiber optic system: � Attenuation lower than copper wire, unrelated to frequency � Immunity to EMI/RFI and noise eliminates the cost of expensive and heavy shielding and complex error checking routines � High data security reduces costs of data encryption. Negligible power radiation from the fiber makes eavesdropping virtually impossible � Safety and electrical isolation: no spark hazard and no ground-loop noise problems. SPECIFICATIONS • Data Rate Up to 19.2 kbps, selectable • Transmission Line Duplex optical cable • Transmission Mode Synchronous, full- or half-duplex • Transmission Controls Carrier constantly on or controlled by RTS • Fiber Optic Characteristics See Table 1 • Operating Wavelength and Transmitter 850 nm VCSEL • Connectors Standard SMA type Optional ST or FC type (see Ordering) • Terminal Interface ITU V.24 / EIA RS-232-C integral 25-pin, male or female connector (see Ordering) Table 1. Fiber Optic Characteristics Fiber Type Optical Receiver Maximum Output Sensitivity Range [µm ] [dBm] [dBm] [km] [mi] 50/125 –32 –45 3 1.8 62.5/125 –28 –45 4 2.4 100/140 –26 –45 4.5 2.7 Note: 100/140 fiber does not work for distances less than 500m. • RTS/CTS Delay 7 or 53 msec • LED Indicator (Plastic Case Products Only) DATA (red): lights when carrier is detected • Power For proper operation, at least 3 of the following DTE interface connectors (DB-25) must be active: 2, 4, 20 and 24. The typical power consumption drawn from the DTE is 60 mW (at +6V signal level). • Physical FOM-5S: Length: 75 mm / 3.0 in Width: 53 mm / 2.1 in Height: 18 mm / 0.7 in Weight: 48g / 1.7 oz FOM-6S: Length: 108 mm / 4.3 in Width: 53 mm / 2.1 in Height: 24 mm / 0.9 in Weight: 74g / 2.6 oz • Environment 0 0 0 0 Temperature: 0 -50 C / 32 -122 F Humidity: up to 90%, non-condensing INSTALLATION Caution. When setting the jumpers or performing any actions inside the open product, be careful not to bend or break any components. To install FOM-5S and FOM-6S: 1. Access the switches: On FOM-5S: Insert a slim screwdriver under the nameplate and ease the nameplate off. Caution. Do not open the case of FOM-5S as this may cause damage. On FOM-6S: Open the unit by pressing the places marked on the sides. 2. Set the jumpers and switch according to the diagram (see Figure 1 or Figure 2), and the jumpers and switch selection table (see Table 2). For explanations of the switches, see the inside of the nameplate on FOM-5S, and on the printed circuit board for FOM-6S. 0 0 9 9 8 8 7 7 6 6 5 5 4 4 SW2 SW1 S1 S2 Baud Rate S4 S5 S6 TxCLK CAR DLY 0 = 19.2 5 = 3.6 INT 7mS 1 = 14.4 6 = 2.4 ON 2 = 9.6 7 = 1.8 EXT 3 = 7.2 8 = 1.2 4 = 4.8 9 = N/A RCV CL 53mS Figure 1. FOM-5S Jumpers and Switch Diagram CLK CARR DLY INT ON 53 EXT RCV CL 7 Figure 2. FOM-6S Jumpers and Switch Diagram 3 3 2 2 1 1 RATE 0 - 19.2 1 - 14.4 2 - 9.6 3 - 7.2 4 - 4.8 5 - 3.6 6 - 2.4 7 - 1.8 8 - 1.2 9 Table 2. Jumpers and Switch Selection Strap Function Position Factory Identify Setting Baud Rate Selects rate of data 0 - 19.2 Switch transmission 1 - 14.4 (SW1) 2 - 9.6 9.6 3 - 7.2 4 - 4.8 5 - 3.6 6 - 2.4 7 - 1.8 8 - 1.2 9 - N\A Clock Selects timing Internal (IN) Internal source External (EX) Receive Clock (RC) Carrier Selects Carrier On (ON) ON constantly on or Controlled (CL) controlled by RTS RTS/CTS Selects RTS/CTS 7 msec 7 msec Delay delay 53 msec 3. Close the unit: For FOM-5S, snap the nameplate back into place. For FOM-6S, press the two halves of the unit together. 4. Plug the modem directly into the 25-pin connector of the terminal or computer port and secure with the screws on each side of the modem connector. 5. Remove the plastic dust caps from the fiber optic connectors and connect the cable to the unit as follows: � Connect the Tx on the local FOM-5S/6S to the Rx on the remote FOM-5S/6S. � Connect the Rx on the local FOM-5S/6S to the Tx on the remote FOM-5S/6S. The modems are ready for operation. The red DATA LED lights when transmission occurs. Declaration of Conformity Mfr. Name: RAD Data Communications Ltd. Mfr. Address: 24 Raoul Wallenberg St. Tel Aviv 69719 Israel declares that the product: Product Name: FOM-5S, FOM-6S Conforms to the following standard(s) or other normative document(s): EMC: EN 55022 (1994): Limits and methods of measurement of radio disturbance characteristics of information technology equipment. EN 50082-1 (1992): Electromagnetic compatibility - Generic immunity standards for residential, commercial and light industry. Supplementary Information: The product herewith complies with the requirements of the EMC Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC. The product was tested in a typical configuration. th Tel Aviv, June 9 , 1999 Haim Karshen Quality Manager European Contact: RAD Data Communications GmbH, Otto-Hahn-Str. 28-30, 85521 Ottobrunn-Riemerling, Germany ORDERING FOM-5S/*/+ Synchronous Fiber Optic Modem (Sub-miniature) FOM-6S/*/#/+ Synchronous Fiber Optic Modem (Miniature) * Specify: F for female 25-pin connector M for male 25-pin connector # Specify: W for metal enclosure (FOM-6S only) (Plastic enclosure standard) + Specify: SMA for SMA type optical connectors ST for ST type optical connectors FC for FC type optical connectors SC for SC type optical connectors (FOM-6S only) www.rad.com International Headquarters North America Headquarters 24 Raoul Wallenberg Street 900 Corporate Drive Tel Aviv 69719, Israel Mahwah, NJ 07430, USA Tel: 972-3-6458181 Tel: (201) 529-1100 Fax: 972-3-6498250 Toll free: 1-800-444-7234 Email: market@rad.com Fax: (201) 529-5777 Email: market@radusa.com 302-100-09/05 Specifications are subject to change without prior notice.  1987–2005 RAD Data Communications Ltd.