RED DIGITAL CINEMA DSMC2 BRAIN with HELIUM 8K S35 Sensor (2018 Unified DSMC2 Lineup) - Manual (Page 235)

CONTACT CLOSURE STYLE TRIGGER BUTTON CIRCUIT
The diagram below shows the contact closure style trigger button circuit on the connector.
Figure: Contact Closure Style Trigger Button Circuit Diagram
COMPATIBLE CABLES
For GPI applications, you can use this cable:
790-0553, 790-0653 : RED 7-Pin 0B-to-Flying Lead Serial Port Cable (6')
For non-GPI applications, you can use this 6-pin cable:
790-0444 : R.C.P. ® -to-T.H.C. Connector Cable 3'
GENLOCK
The DSMC2 REDVOLT Expander features a Genlock (GEN) connector.
The 75 ohm BNC connector accepts incoming sync and genlock signals.
75 OHM BNC CONNECTOR
PIN SIGNAL DESCRIPTION DIRECTION
Center SYNC SMPTE ST 274
RS 170A Tri-Level Sync
In
Shield/Screen GROUND Camera ground N/A
COMPATIBLE CABLE
790-0341 : RED HD-SDI Cable (6’)
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DSMC2 HELIUM OPERATION GUIDE