ADS Environmental Services FlowShark QR 775002 A4 - Manual (Page 25)

2-12 ADS FlowShark Manual
Voltage Regulator Board (ADS p/n 5000-0518)
Analog 4-20mA I/O Board
The ADS Analog I/O board (ADS p/n 5000-0517) is responsible for
receiving information from 2 analog inputs and/or outputting
information via 2 analog outputs. These I/O channels use a current
loop (4 to 20 mA) to receive or send information. Analog input
processing consists of measuring the input current, converting it to
digital information and transferring it to the DSP board for storage.
Analog outputs are processed by receiving digital information from
the DSP and converting/scaling it to an analog output. The board
also receives external DC power and uses it to power the analog
output signal loop (separate from the external monitor power).