Vega Customer Applications Manual
Section 10 - Combining Modules
Rev. A3: October 2003
Page 42 of 48
Module Good connection with combination modules.
Each option board fitted to each module in the combination has an opto isolated npn transistor which is ON when that
module is good. Connect both transistors together in series so that both transistors will be ON when the module
combination is good.
Both transistors ON = Module combination GOOD.
On, or other, or both transistors OFF = Module combination BAD.
Low" when module good.
Module good Collector (C)
Module good Emitter (E)
Module good Collector (C)
Module good Emitter (E)
E
C
Output Voltage
Module Good Signal
V
0V
Module Good signal
Module 1 of combination
Module 2 of combination
Each Transistor.
Vce saturated (on) less than 0.4V
Ic maximum 1mA
Vce max 50V
