Model 2005

RS-232 Asynchronous Optical Modem using ST Fiber Connectors

Multi-mode fiber or single-mode fiber versions

Model 2005 Bit-Driver® is an asynchronous simplex or full duplex system capable of transmitting data at operating speed from 110bps to 56 Kbps over fiber optic cable. Fiber optic cable offers the advantage of small size, light weight and complete electromagnetic freedom from the problems of EMI/RFI to its maximum operating range of up to 6600 feet.

Totally dielectric fiber optic cable is immune to high voltage and lightning. This compact asynchronous system can help you transmit data in-house or in other short-haul applications through the noisiest operating environments without losing a bit. (Bit error rate =10^-9) It's a stand-alone component, complete with RS-232 interface, 120 volt power cord plus input and output fiber ST transmission connections.

LEDs are used to indicate the presence of carrier and data signaling over the data path. There is a diagnostic logic probe to verify "high" or "low" status of TD, RD, TSR, CTS, DSR and DCD circuits -- without a breakout unit. Includes null modem switch to configure the modem as a DTE device instantly, and a constant or controlled carrier switch.

TRANSMISSION LINE INTERFACE
Operating distance is dependent upon optical fiber core diameter and the cable's optical attenuation. The table below indicates three cables that may be used at any data rate. These cables are available in connectorized assemblies to meet the exact configuration of your application.

S.I.Tech offers complete links including fiber optic cable, connectors, cable assemblies, and Bit-Drivers®.

Specifications

Operating Mode:	Asynchronous, simplex or full duplex
Input/Output Interface:	RS232-C, Type D Asynchronous At 110 bps to 56 Kbps. DTE or DCE via null modem switch in Modem
Transmission Line Interface:	Two ST fiber optic connector Receptacles for interfacing with fiber optic duplex cable. SMA connector is an option
Transmission Distance:	6600 ft (2000 m) (5 km option)
Transmitter Enabled by RTS:	RTS/CTS delay 15ms
Constant and Controlled Switch for Carrier:	Constant = RTS is always true
Optical Power into a 50 Micron Core Optical Fiber:	0.5microwatts, 15dB power budget @ 880 nanometers
Receiver Sensitivity:	15 nanowatts at less than 10-9 bit error rate
Diagnostics:	Build-in logic probe
Operating Temperature:	0° C to 50° C
Input Power:	105 to 130VAC, 50-500Hz, 10W power transformer secondary fused for wall outlet
220Volt Version:	Model 2005V
Metal Enclosure:	7.5” x 7” x 3” (19 x 17.8 x 7.6 cm)
Weight:	3lb. (1.36kg)
Rack Mount Version:	Model 2305

Operating Distance for Fiber Optic Cable

Optical unit connection: Connect the optical transmission line to T and R receptacles. Note which cable channel goes to T or R by noting cable imprint. On the other end, reverse the connection.

RS-232 Connector Pins Utilized by Model 2005