The Omron F39-JGR12L is an extended cascading cable for the F3SG-SR/PG series safety light curtains. It's the 12 cm version, packed in bulk — a straightforward field-replacement or installation spare for linking multiple light curtain segments in a daisy chain.
What it fits and why it matters
This cable connects between F3SG-SR/PG light curtain heads to pass safety signals and power down the cascade. The 12 cm length is short — meant for tight stacking where sensor heads sit close together, not for routing around a machine corner. If you're extending the cascade beyond a few centimeters, you'll want a longer variant; this one keeps the connection tidy and avoids excess cable loops in the panel or on the machine frame.