AS3000™ Service Manual 0070-10-0683 1 - 35
Theory of Operation Ventilator UI
1.7.3 Communication Interface / RS232 Isolate Board
FIGURE 1-26 RS232 Isolate Board, Top View
FIGURE 1-27 RS232 Isolate Board, Bottom View
RS232 Isolator
1.7.4 Fuses
The AS3000 has 10 fuses on the back panel of the unit. There are two 2A fuses for each of
the four outlets and two 10A fuses for the line cord.
Power, J3
Pin Name Function
4. 5V Power 5V
5. NC No connection
6. GND Ground
COM1/2
Pin Name Function
2 RXD 232RXD TO PC INPUT
3 TXD 232TXD TO PC OUTPUT
5 GND Ground
COM1A/B
Pin Name Function
2 TXD 232TXD TO PC OUTPUT
3 RXD 232RXD TO PC INPUT
5 GND Ground
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