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4-Channel RIU Board Assembly (prior to RIU version 4.1)

Document No. ASSY-01-RIU04-A-MN

RIU General Information

RIU-01-04

  1. +5 VDC regulated power supply required (supplied with unit), maximum current consumed is 500 mA.
  2. A packaged RIU weighs 1.5 lbs.
  3. The power supply included with the unit weighs 5 oz.
  4. 19" rack mount kits are available

Connecting RIU to TDM Ring

  • Up to 15 RIUs may be connected in a ring.
  • Each RIU in the ring must have a unique address.
  • The RIU address is set via a rotary switch on the rear panel

Connecting RIU to AIU

Using the RIU's Serial Ports

C214-C Board Layout


Click on the image to the right for a larger view in a new window.

Notes for Cable Interfacing

  1. Serial Channel A & B pinout, RJ-12 style jack, utilizing RS-422
    1. Serial Channel A & B pinout, RJ-12 style jack, utilizing RS-422
      1 Tx+
      2 Tx-
      3 Rx+       		4 Rx-
      5 +5 VDC
      6 Ground
    2. TDM Link In/Out, RJ-45 style jack
      1 Rx+
      2 Rx-
      3 Tx+
      4 Syn-       		5 syn+
      6 Tx-
      7 Sck+
      8 Sck-
    3. Input/Output Channels 1-4
      Pin Table
    * Contact ASTi if you wish to connect equipment other than line-level devices or ASTi's Audio Interface Units to the RIU.

    Audio Input Circuitry

    • Input impedance is >4.7kOhms
    • Balance input with a maximum signal level of+/- 2.25 Vpeak
    • 2 separate audio input channels per RIU

    Digital Input Circuitry

    • Contact sensing input
    • One digital input per audio channel

    Audio Output Circuitry

    • Output impedance is less than 100 Ohms
    • Balanced output with a maximum signal level of +/- 2.25 Vpeak
    • Output power is 2 mW maximum
    • 2 separate audio output channels per RIU

    Digital Output Circuitry

    • Digital output is opto-isolated
    • One digital output per audio channel

    DISCLAIMER

    The RIU is a sound production device. The user, by act of installing and using the RIU and any associated equipment such as headset and speakers warrants and represents that he/she is aware that excessive audio levels can cause permanent hearing impairment and that he/she assumes full responsibility for configuring all equipment including hardware and software to achieve safe operating sound pressure levels under all conditions.
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