Model 2119

RS-485 Fiber Modem

• Master/Slave Mini Modem Pair
• Custom designed for IBM RS/6000 Unit connected to an IBM or Async concentrator (RS-485 to RS-232 Cluster controller - 128 users)
• Point to Point Links up to 2.5 Km
• Link consists of one 2119 "Master" Bit-Driver and one 2119 "Slave" Bit-Driver
• Use 7129 Master/Slave cables
• Use S.I. Tech Model 2129 for newer systems

Specifications

Operation Mode:	Synchronous, half or full duplex
Input/Output Interface:	RS-485, DB-9F, 9 wire port operating at 1.2 Mbps
Transmission Line Interface:	ST connector is standard for interfacing with fiber optic duplex cable (SMA option)
Transmission Distance:	6600 ft. (2 km)
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, 10 microwatts max
Operating Temperature:	0 C to 50 C
Metal Enclosure:	1.75 x 3 x 0.625 in (4.5 x 7.5 x 1.6 cm) Panel or DIN rail mounting option
Weight:	0.25 lb (100 grams)
Input Power:	External with power supply (S.I. Tech #2121 - 110VAC to 12 Volt DC)
230V Version:	Use S.I.Tech 2122 power supply

DB-9F RS-485 9 Pin Connector Female Pins Utilized by 2119 Mini Modem

Pin No.	Description	Master	Slave
1	GND	Gnd	Gnd
2	RX Data +	Output	Input
3	RX Data -	Output	Input
4	RX Clock +	Output	Input
5	RX Clock -	Output	Input
6	TX Clock +	Input	Output
7	TX Clock -	Input	Output
8	TX Data +	Input	Output
9	TX Data -	Input	Output

Operating Distance for Fiber Optic Cable

Fiber Size	Attenuation	Distance	Distance
(Microns)	dB/Km	Meters*	Feet*
50	3	2000	6600
62.5	4	2000	6600

* High Power Option Available