S.I. Tech, Inc.Model 2228 - Optical Mini Multidrop Bit-Driver®

Operation Mode: Asynchronous half or full duplex
Input/Output Interface: RS-485, 2 wire port operating up to 256 Kbps (Factory set)
Transmission Line Interface: ST connectors are standard for interfacing with fiber optic duplex cable (SMA option)
Optical Power into a 62.5 Micron Core Optical Fiber:
10 microwatts, 13 dB power budget @ 850 nanometers (1300 nm option)
Receiver Sensitivity: 500 nanowatts at less than 10-9 bit error rate. 50 microwatts max.
Operating Temperature: -40 °C to +80 °C
(-20 to +60 °C Single mode)
Metal Enclosure: 4.80 x 2.25 x 1.0 in
(12.2 x 5.71 x2.54 cm)
Panel or DIN rail mounting option
Weight: 0.25 lb (100 grams)
Input Power: External with power supply
(S.I. Tech #2121 - 110 VAC to 12 VDC)
230 Volt Version: Use S.I.Tech 2164 power supply
  • Wide temperature range Multi-drop RS-485 to fiber Mini Bit-Driver.
  • Multimode is standard, Single mode optional.

Fiber ports repeat data through the 2228 and drop/insert data on the RS-485 port. The RS-485 port inserts data onto both fiber ports and gets data dropped from either fiber port.


Model Number Description
2228 Multimode to Multimode, ST Connectors
2228-MM-SM Multimode to Single Mode, ST Connectors
2228-SM-SM Single Mode to Single Mode, ST Connectors

Meets FCC requirements of Class A, Part 15 Computing Devices Standard.
Specifications subject to change without notice.

View Complete Technical Data Sheet (PDF)


Contact Information: Phone: 630.761.3640 Fax: 630.761.3644 Email: sales@sitech-bitdriver.com
S.I. Tech, Bit-Driver®, and Fiber Cluster® are registered trademarks of S.I. Tech, Inc.
©2012 S.I. Tech, Inc. All copy and images.