M91-t4-r6-zk1 Manual //free\\ Jun 2026

| LED | Status | Meaning | |-----|--------|---------| | PWR | Green | Power OK | | RUN | Flashing | Program running | | ERR | Red | Hardware fault or program error |

| Pin # | Standard Function | Wire Color (Convention) | Notes | | :--- | :--- | :--- | :--- | | 01 | VCC (Power In) | Red | Usually 12V–24V DC. | | 02 | GND (Ground) | Black | Common ground for logic and power. | | 03 | Signal A / Input 1 | White | Trigger input (Active Low or High). | | 04 | Signal B / Input 2 | Blue | Secondary trigger or data line. | M91-t4-r6-zk1 Manual