To offer customers maximum flexibility, RED offers two different types of remote trigger (start/stop) protocols: Momentary Ground and Schmitt trigger. The cinema industry commonly uses the Momentary Ground protocol, also known as Contact Closure.
3.3 V Schmitt
The SYNC connector on DSMC cameras and the DSMC2 BASE EXPANDER use a 3.3 V Schmitt trigger (5 V tolerant). The trigger is not a switch closure circuit, so it requires that the trigger source supplies current. Both edges of the input signal may be used as a trigger.
The following devices feature a SYNC connector with 3.3 V Schmitt trigger input:
- DSMC2 BASE EXPANDER
- DSMC EPIC MYSTERIUM-X
- DSMC SCARLET MYSTERIUM-X
- DSMC EPIC DRAGON
- DSMC SCARLET DRAGON
You will want to have the following settings set in camera:
Contact Closure / Momentary Ground
The following devices feature a connector with Contact Closure style trigger input:
- DSMC2 JETPACK-SDI EXPANDER
- DSMC2 JETPACK EXPANDER
- DSMC2 REDVOLT EXPANDER
- DSMC2 V-LOCK I/O EXPANDER
- DSMC2 PRODUCTION MODULE
- RED RANGER camera
You will want to have the following settings set in camera, except for RED RANGER:
When using Third-Party accessories that use our RED Command Protocol (RCP) to trigger Start/Stop, you will need to have RCP enabled in the camera.
Related Support Articles:
Please contact RED Support with any questions.