Affected Products

Problem | Symptoms

The open collector outputs on the Core 510i do not function correctly. When turned off, the output continues to sink current, driving a load attached to the output pin. Additionally, the output operation appears to be inverted.

Causes | Verification

Current Flow Issue: When the output is off, the open collector pin should float, allowing the voltage to rise to the supply voltage. However, it does not, indicating current flow through the GPIO circuitry to GND, which is enough to turn on a connected relay.

Inverted Outputs: When the open collector output is on, the voltage should read approximately zero, but it does not. When turned off, the voltage should float to the supply voltage but instead reads 0V.

Solution | Workaround

Use High Drive, High Current Option: Instead of using the open collector output, use the 12V high drive, high current option.

Software Configuration: Configure the GPIO pin in RAW mode and experiment with different control combinations to find a setup that works for specific needs.

Control and Logic: Use a custom control and logic inverter or a scriptable control to provide a button with proper logic sense that is wired to the button with inverted logic.