Simultaneous Output ON (Source Type)

What does SIMULTANEOUS-OUTPUT-ON mean?

When one output of a transistor output (source type) module is turned on, other loads connected to different outputs simultaneously turn on. This fault arises from a non-connection or disconnection between the external power supply 0V and the common line of the load, allowing current to flow through parasitic circuits in the off-state output elements. Continuous operation under this condition can lead to module failure.

• Non-connection or disconnection between the external power supply 0V and the common line of the load.
• Current flowing through parasitic circuits within the off-state output elements of the transistor output (source type) module.
• Incorrect wiring configuration where common lines are not properly referenced to the external power supply 0V.

Click steps to track your progress.

1. 1

   Correctly connect the external power supply and the load, ensuring the 0V and common lines are securely and properly connected.

2. 2

   To prevent further occurrences, insert diodes at each output terminal to block parasitic current paths and isolate the outputs from unintended activation.