The 7I70 48 point remote isolated field input card is designed for fast real time PC based control systems. The card has smart DC voltage sensing inputs with variable threshold sensing. Default input threshold is 50% of field power voltage with 20% hysteresis – but each input is adjustable. All input pin voltages are also readable with 8 bit resolution.
The 7I70 communicates with the host with an isolated 2.5 Mbaud RS-422 link using CAT5 cable. Input impedance is 10 K Ω and input voltage can range from 5 to 32 Vdc. The card takes about 600 mW from an 8 to 32 V supply. ($57 ea/100 – available now.)
by Jim Harrison
Mesa Electronics , Richmond , CA
Sales 510-223-9272
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