The F39-JG10B-D is a 10-meter cable assembly from Omron's F3SG-R series, built to connect the safety light curtain to your control system. It's the factory-specified interconnect for that series, so you're not guessing on pinout or shielding — it mates cleanly with the F3SG-R emitter and receiver heads.
What the length means for your install
10 meters covers most machine-zone runs without a junction box — line down the cable tray, one continuous pull from the light curtain column back to the safety controller cabinet. If your machine footprint needs more reach, you'll need an extension cable or a field-wired terminal block; this length is the standard drop for a single-cell safety zone.
Omron lists the F39-JG10B-D as an active product. It is the current production cable for the F3SG-R series.