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Remote Interface Unit (RIU)

Final Version: 4.2.2

Technical User Guide

The following information is pulled from the RIU Techincal User Guide. For a comprehensive overview of the RIU, please see the full guide:

View Guide

The RIU is a legacy hardware component of ASTi's DACS audio and communications simulation system.

A comprehensive overview of the RIU can be found in the Technical User Guide

General Specifications

Compatible with DACS
Dimensions 5.5"W x 1.5"H x 7.5"D
Mounting Desktop, 19" rackmount kit available
Power +5VDC, 1.1A max, fuse protected (plug-in AC/DC converter supplied with each unit)
Audio Connection 9 pin female sub-min "D" (1 audio input/output and 1 digital input/output each connector)
Mean Time Between Failure (MTBF) 400,000 hours

Audio Input/Output

Audio Inputs (per channel)

Impedance > 10 kOhm, Balanced
Level +/- 2.25V peak max
Gain User configured 0-60 dB

Audio Output

Impedance Balanced
Level +/- 2.25V peak max
Power 1W RMS into 8 Ohm bridged load, 250mW into 8 Ohm single ended

Digital Input/Output

Digital Inputs

Quantity One per audio channel
Configuration 2 pins each audio connector (ground and sense pin)

Digital Outputs

Quantity One per audio channel
Configuration Opto-Isolated, 120mA, 2 pins on each audio connector

TDM Ring

Connection Standard RJ45 Jacks (8 pin)
Maximums 300 ft. length, 14 RIUs/ring, 24 operators/ring
TDM Cabling Standard 4 pair, Category 5 twisted pair network cable

Serial Ports

Quantity 2
Type RS-422
Connection Standard RJ12 Jack (6 pin)


See ASTi's Standard Terms and Conditions.