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This two-channel interface supplies light to two fiber optic sensors, monitors the amount of light transmitted through the sensors and detects small changes caused by loads applied to the sensors.  With its advanced circuitry, the interface can detect a load on a sensor for as long as it is applied to the sensor. The MD-220 incorporates a TI MSP-430 embedded microcontroller, programmable via a JTAG interface. It has a 10-wire screw-clip interface with power supply terminals and four floating optocoupler outputs. It also has a RS-232 interface data transmission and troubleshooting. Direct external control is possible through the use of an 8- way SIL switch, two jumpers and a reset switch. For quicker troubleshooting, six LED status displays show the function of the interface and there are five easily accessible test points for analog measurements. Power consumption has been minimized by circuitry that operates the transmitter diodes in series while independently controlling the current through each diode. The MD-220 uses near infrared diodes which give each channel a dynamic range of 30 dB.


  • 2 channel digital interface
  • Flexible optocoupler digital outputs
  • Direct external control
  • Minimal power consumption
  • Adjustable trigger level impulse duration
  • Sensor failure indication


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Sensor Type  Fiber Optic Axle Sensors

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This information has been provided to your free of charge for your use but remains the sole property of TE Connectivity Corporation (''TE'') or SnapEDA,  Inc. or Ultra Librarian/EMA Design Automation, Inc. (collectively, "Company"). While Company has used reasonable efforts to ensure its accuracy, Company does not guarantee that it is error-free, not makes any other representation, warranty, or guarantee that the information is completely accurate or up-to-date. In many cases, the CAD data has been simplified to remove proprietary detail while maintaining critical interface geometric detail for use by customers. Company expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties or merchantability or fitness for a particular purpose.