Answer:
The sternal front D-ring connects directly to vertical lifelines, guided fall arresters, and ladder safety sleeve systems, while the dorsal back D-ring accepts standard EN 361 energy-absorbing lanyards and self-retracting lifelines (SRLs).
The 3M PROTECTA FIRST 1390024 climbing harness is designed for multi-system compatibility across personal fall protection arrangements:
- Sternal Front D-Ring Applications: Connects to guided-type fall arresters on rigid anchor lines (ladder safety climbing sleeves), flexible vertical lifelines, and rope grab systems for controlled ascent and descent on wind turbines, transmission towers, and fixed ladders.
- Dorsal Rear D-Ring Applications: Serves as the primary fall arrest anchor connection point for shock-absorbing lanyards (single or twin-leg) and overhead self-retracting lifelines (SRLs) compliant with standard EN 361 anchor connectors.
- System Restrictions: This model is not equipped with a waist body belt and does not support work positioning via side hip D-rings. It does not contain an embedded Connected Safety ID module.
