RED Epic Operation Manual page 162

R E D D S M C O P E R AT I O N G U I D E
5. On the Brain GPIO tab, set Camera Input to Sync In.
6. On the Brain GPIO tab, set Camera Output to Sync Out. (Optional)
Supply a pulse from the Motion Control device to sync the shutter to the rising edge of the sync input.
For more information, refer to the Motion Control manufacturer's instructions.
REQUIRED CABLE
 790-0154: 3BNC-to-00 LEMO Sync Cable (required per SYNC and CTRL port used)
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MoCo BRAIN/GPIO
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