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Model 9308

Twinax to Fiber Optic Multiplexer

S.I. Tech Model 9308 Twinax to Fiber Optic Multiplexer

S.I Tech Model 9308 multiplexer Bit-Driver® is designed to work with IBM System 3/X, AS/400 and 5251 controller using twinax cable. Model 9308 Bit-Driver is an 8 channel twinax to fiber optic transmitter / receiver full duplex multiplexer product implementing IBM Protocol. Normal operating data rate is 1 Mbps on each port.

This fiber optic Bit-Driver product eliminates many disadvantages of twinax, especially EMI/RFI, ground loops (electrical isolation with fiber), high attenuation (high signal loss), limiting distance between nodes of system (5000 feet max twinax), lightning damage outdoors between buildings.

S.I.Tech Model 9308 is a standalone product allowing easy change from twinax to fiber: Simply disconnect twinax cables and connect to model 9304 input/output port. Model 9308 comes with power supply and status indicators.

Specifications

Operating Mode:	Synchronous, half/full duplex, 1 Mbps serial bi-phase data each port
Input/Output Interface:	100 Ω twinax bulkhead jack, IBM protocol
Number of Channels:	8
Transmission Line Interface:	2 ST connector fiber optic receptacles (SMA option)
Data link Speed:	5 Mbps
Transmission Distance:	2 Km (6600 ft.), (5 Km option)
Transmitter Output Power:	30 microwatts into 50 micron fiber
System Wavelength:	850 nanometers
Receiver Sensitivity:	3µW at less than 10^-9 bit error rate
Operating Temperature:	0 °C to 50 °C
Input Power:	110/220 VAC, 50/60 Hz, 20W, detachable power cord, power supply meets UL, CSA, VDE, IEC requirements
230V Version:	9308V
Metal Enclosure:	10.0" x 5.5" x 10.5" (25.4 x 14 x 26.7 cm) (2 units can be rack mounted in 19" rack)
Weight:	12 lbs. (5.54Kg)

*Receiver (0.1 µw sensitivity) available for 5 Km option 1300 nm single mode and multimode TR/REC option.

Operating Distance for Fiber Optic Cable

S.I. Tech Model 9308 Diagram

NOTES: S.I.Tech multiplexer can support one controller (one card from IBM 3/X and AS/400). IBM machines come with a various number of ports per controller. Check IBM equipment manuals for details. The number of ports is not fixed. While seven devices are supported per any given port, the total devices the controller card can support does not equal 7 x number of ports, e.g. System 36 has options such as:
First: 6 devices - one controller card. Second: 28 or 36 devices - one controller card. Third: 72 devices - second controller card. System 38 controller supports 32 devices. Total 400 with 10 controller cards. AS/400 controller supports 40 devices. Total 400 with 10 controller cards.
S.I.Tech 9308 can support 32, 36 and 40 devices as long as only one controller card is connected to 9308 ports.
S.I.Tech Model 9308 is totally transparent and uses IBM Protocol and addressing.
If other than twinax cable is used, impedance matching transformers (balun) are needed. Related products: 2836/9036/9302/9304/9328.

IBM and AS/400 are registered trademarks of International Business Machines Corp.

S.I. Tech Model 9308 Diagram