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Model 2139

Fiber RS-232 to Fiber Optic Multidrop Modem

S.I. Tech Model 2139 Fiber RS-232 to Fiber Optic Multidrop Modem

S.I. Tech model 2139 is a mini multidrop optical Bit-Driver that contains three fiber ports. The upstream and downstream fiber ports repeat data through the 2139 multidrop and drop/insert data on the RS-232 fiber port. The RS-232 fiber port inserts data onto upstream fiber port only and gets data dropped from upstream fiber port only. The downstream fiber port only sends/receives data from the upstream fiber port. Having fiber on all three ports provide total optical isolation to attached equipment.

Specifications

Operating Mode:	Asynchronous, half duplex
Input/Output Interface:	RS-232, up to 115 Kbps
Transmission Line Interface:	ST connectors are standard for interfacing with fiber optic duplex cable (SMA connectors for plastic fiber)
Optical Power into a 62.5 Micron Core Optical Fiber:	10 microwatts, 13 dB power budget @ 850 nanometers
Receiver Sensitivity:	500 nanowatts at less than 10^-9 bit error rate. 50 microwatts max.
Operating Temperature:	0°C to 50°C
Input Power:	+ 12 VDC (Use S.I.Tech 2121 Power Supply)
Metal Enclosure:	4.80 x 2.25 x 1.0 in (12.2 x 5.71 x 2.54 cm)
Weight:	0.4 lb. (200 grams)

Operating Distance for Fiber Optic Cables

S.I. Tech Model 2139 Diagram