18
Instruction Manual
SECTION 3 - OPERATION
4. Opto
Isolator
2. NPN Transistor
Base goes high
to trigger pump
White
3. PNP Transistor
Base goes low
to trigger pump
1. Switch Closure
Switch closing
triggers pump
PIN
3
2
3
2
3
2
3
2
Blue
− White
+ Blue
− White
+ Blue
− White
+ Blue
Figure 14. Methods of Externally Triggering or Pacing AD8 and AD9 Pumps