Model 2004

RS-232 Synchronous Optical Modem using ST Fiber Optic Connectors

Multi-mode fiber or single-mode fiber versions

S.I.Tech Model 2004 optical, synchronous, simplex or full duplex Bit-Driver can be used for in-house process control or in-plant interconnection of a wide variety of EDP equipment. It has switch selectable internal clocking for 2400, 4800, 9600 and 19200 bps. There is an external clocking provision for up to 56K bps operation.

Model 2004 is a stand-alone component complete with RS-232 interface, 120 volt line power cord, plus input and output fiber ST transmission connections. This system utilizes small size, lightweight fiber optic cable which has complete immunity from -- and does not emit -- either electro-magnetic or RF radiation. It is not affected by high voltages, lightning, is non-conductive, and will not cause a sparking condition. This means the system may be used even in dangerous and highly active electrical environments and/or for secure communications. The transmitter and receiver are electrically isolated.

Model 2004 is an inexpensive answer to dependable, errorless performance in highly congested, noisy equipment areas (Bit error rate⁹). It has status LEDs that indicate the presence of a carrier and data signaling over the communications path. It offers a RS-232 and transmission line loopback capability to verify link integrity and assist in hardware diagnostic problems. A build-in logic probe permits verification of true or false status of all RS-232 signals without a breakout unit.

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-DriversŪ.

Specifications

Operating Mode:	Synchronous, simplex or full duplex
Input/Output Interface:	RS-232-C, Type D Asynchronous at 2.4, 4.8. 9.6, 19.2 kbps, or external clock to 56 Kbps.
Transmission Line Interface:	2 ST fiber optic connector receptacles for interfacing with fiber optic duplex cable. SMA optional.
Transmission Distance:	6600 ft (2000 m) (5 km option)
Constant or Controlled Carrier:	Carrier Controlled by DTR
Optical Power into a 50 Micron Core Optical Fiber:	.5 microwatts, 15 dB power budget @ 880 nanometers
Transmission Wavelength:	880 nanometers (1300 nm option)
Receiver Sensitivity:	15 nanowatts at less than 10-9 bit error rate
Operating Temperature:	0 °C to 50 °C
Input Power:	105 to 130VAC, 50-500Hz, 10W power transformer secondary fused for wall outlet. Three wire standard cord for wall outlet.
220Volt Version:	Model 2004V
Metal Enclosure:	7.5" x 7.0" x 3.0" (19 x 17.8 x 7.6 cm)
Weight:	3lb. (1.36kg)
Rack Mount Version:	Model 2304

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 2004