SkyTrac Systems Ltd.
Document Rev. 01.020 DOC0334 Page 13 of 49
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2 SYSTEM SPECIFICATIONS
2.1 General
This section contains tables that list the physical and electrical requirements and specifications of
each component in the ISAT-200 system.
2.2 Power Requirements for the ISAT-200 System
Table 4— Power Requirements
Input Voltage: 10 to 32 VDC, 28 VDC nominal
Average Power: 14 W typical, 25W maximum
2.3 Audio Interface
Table 5— Audio Interface Specifications
150 mW minimum into 600 or 300 ohm.
0.007 Vrms to 1.4 Vrms maximum.
Microphone Input Impedance
Software Enabled Bias: 10 VDC maximum
Audio output short circuit protected
2.4 Digital and Analogue I/Os
Table 6— Digital and Analog I/Os
Ground Seeking Digital Inputs
100 Ohms max for ground state, Maximum: 35 VDC
Voltage Seeking Digital Input
> 5 Volts for logic high, Maximum: 40 VDC
Meets requirements of TIA/EIA-232-F standard
TX maximum: +/- 13.2 V, RX maximum: +/- 25V
Meets requirements of TIA/EIA−485−A standard
Extended Common Mode: -20V to 25 V
Fail-safe receiver: Open circuit, short circuit, bus idle
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