RAD FOM-5A

ORDERING FOM-5A, 6A FOM-5A/*/+ Asynchronous Fiber Optic Asynchronous Sub-miniature Fiber Optic Modem Modems FOM-6A/*/+/# Asynchronous Miniature Fiber Optic Modem * Specify: F for female 25-pin connector M for male 25-pin connector + Specify: ST for ST type optical connectors FC for FC type optical connectors SC for SC type optical connectors # Specify: W for metal enclosure (for FOM-6A only 307-100-08/02 Specifications are subject to change without prior notice.  1987–2002 RAD Data Communications Ltd. • FOM-5A and FOM-6A incorporate all the FEATURES DESCRIPTION advantages of a fiber optic system, providing: • FOM-5A and FOM-6A, Asynchronous Fiber • Asynchronous transmission up to Optic Modems, are used for local data ■ 19.2 kbps Lower attenuation than with copper wire distribution connecting full or half duplex ■ EMI/RFI immunity, saving the cost of async computers and terminals. A pair of • Transmission range up to 3 km modems ensures integrity of data expensive and heavy shielding, and (2 miles), regardless of data rate transmission over fiber optic cable at complex error checking routines • Full or half duplex distances up to 3 km (2 miles). ■ Almost absolute security and reduction in • FOM-5A is a miniature version of FOM-6A. • Transfers one control signal end-to-end the cost of data encryption; eavesdropping Both modems are fully compatible and offer is virtually impossible as negligible power • DCE-DTE switch the same features. FOM-5A is 78 mm is radiated from the fiber (3.1 in) by 18 mm (0.7 in); FOM-6A is • No external power required ■ 110 mm (4.3 in) by 24 mm (0.9 in). Safety and electrical isolation: no spark hazard and no ground-loop noise • Plugs directly into V.24/RS-232-C • FOM-5A and FOM-6A feature a problems. terminal connector switch-selectable DTE/DCE option. This allows operation as DTE, for connection to Note: Attenuation is not related to frequency. • LED indicator for transmit data another DCE such as a multiplexer port, eliminating the need for a cross-cable. The • Compact, lightweight, easy to install carrier can be strapped for either continuous operation, or for switched operation controlled by the RTS signal, for transfer of a APPLICATION control signal end-to-end. A LED indicator lights whenever data transmission takes place. Note: With FOM-6A in a metal case, the LED indicator is not available. • The delay between Request to Send and Clear to Send can be set for 2 or 15 msec. • Innovative circuitry allows FOM-5A and FOM-6A to operate without connection to A pair of FOM-5A or FOM-6A modems ensures the mains supply, by using ultra-low power secure data transmission over fiber optic cable from the data and control signals. at distances up to 3 km (2 miles). • Both modems are provided in a plastic enclosure. FOM-6A can optionally be supplied in a metal case to reduce radiated emission (see Ordering). • Terminal Interface SPECIFICATIONS Declaration of Conformity V.24/RS-232-C integral 25-pin, male or Mfr. Name:RAD Data Communications Ltd. • Data Rate female connector (see Ordering) Up to 19.2 kbps Mfr. Address: 12 Hanechoshet St. • RTS/CTS Delay Tel Aviv 69710 • Pulse Width Distortion 2 or 15 msec Less than 25% Israel • Fiber Optic Interface • Transmission Line Optical connectors: Optional ST or FC types declares that the product: Duplex optical cable (see Ordering) Product Name: FOM-5A, FOM-6A • Transmission Mode • Power Conforms to the following standard(s) or other Asynchronous, full or half duplex For proper operation, the following digital normative document(s): interface connectors (DB-25) must be active: • Transmission Controls ■ DCE mode: 2, 4 and 20 EMC: EN 55022 (1987): Limits and Carrier constantly on or controlled by RTS ■ methods of measurement of radio DTE mode: 3, 6 and 8 • Optical Output Levels disturbance characteristics of Typical power consumption drawn from -28 dBm into 100/140 fiber information technology equipment. these pins is 50 mW (at +6V signal level). -32 dBm into 62.5/125 fiber EN 50082-1 (1992): Electromagnetic • Physical -36 dBm into 50/125 fiber compatibility - Generic immunity FOM-5A: standards for residential, commercial • Receiver Sensitivity Length: 78 mm / 3.1 in and light industry. -45 dBm Width: 53 mm / 2.1 in Supplementary Information: Height: 18 mm / 0.7 in • Operating Wavelength Weight 54g / 1.9 oz 850 nm The product herewith complies with the requirements FOM-6A: of the EMC Directive 89/336/EEC and the Low Voltage • Operating Range Length: 110 mm / 4.3 in Directive 73/23/EEC. The product was tested in a Maximum range is 3 km (2 miles) over Width: 53 mm / 2.1 in typical configuration. continuous fiber of the following types: Height: 24 mm / 0.9 in ■ Weight: 82g / 2.9 oz th 100/140 fiber with attenuation of 4 dB/km Tel Aviv, December 28 , 1995 ■ 62.5/125 fiber with attenuation of • Environment 3.5 dB/km Temperature: 0–50°C / 32–122°F ■ 50/125 fiber with attenuation of 3 dB/km Humidity: up to 90%, non-condensing Haim Karshen VP Quality European Contact: RAD Data Communications GmbH, Otto-Hahn-Str. 28-30, 85521 Ottobrunn-Riemerling, Germany 6. Remove the plastic dust caps from the fiber INSTALLATION optic connectors and connect the cable to Caution. Be careful when setting jumpers or the unit. Observe the following directions: performing any actions within the product so that you • TX on the local modem should be do not bend or break any components. connected to RX on the remote modem Installation of FOM 5A and FOM-6A is • RX on the local modem should be straightforward and simple. Just follow these connected to TX on the remote modem. instructions: FOM-5A, FOM-6A is now ready for operation. 1. To access the switches: The red DATA LED lights when transmission For FOM-5A: occurs. Figure 2. FOM-6A Strapping Diagram Insert a slim screwdriver under the FOM-5A nameplate and ease the nameplate off. Table 1. Strap/Switch Selection For FOM-6A: Open the unit by pressing the places marked Strap Function Position Factory on the sides. Identify Setting 2. Strap the modem according to the strapping CARR Selects Carrier On (ON) ON diagram (Figure 1 or Figure 2) and the strap constantly ON or Controlled selection table (Table 1). Explanations of the controlled by RTS (CL) switches are also given on the printed circuit board. DLY Selects RTS/CTS delay 2 msec 2 msec 3. FOM-5A and FOM-6A are factory set for 15 msec DCE. For DTE operation, move the switch to DCE/DTE Selects DCE or DTE DTE the DTE position. Switch DCE DCE 4. To close the unit: Figure 1. FOM-5A Strapping Diagram For FOM-5A: Snap the nameplate back into place. For FOM-6A: Press the two halves of the unit together. 5. Plug the modem directly into the 25-pin connector of the terminal/computer port and tighten the screws on each side of the modem connector. DCE Position DTE Position 2 DI 2 DI TD TD RD 3 DO RD 3 DO RTS RTS 4 RTS 4 CD D CTS 5 CTS 5 N.C. 300 ohm +V DSR 6 DSR 6 CD DCD 8 DCD 8 300 ohm +V DTR 20 DTR 20 Figure 3. DTE/DCE Switch Operation