危險區Zone 2/ Div. 2 的現場儀錶連接到段保護器上，骨幹上的電源受電源單元限制為無火花型。骨幹採用Non-incendive 接線方式。段保護器分支也是Non-incendive型，允許帶電維護現場儀錶。段保護器在骨幹上提供短路保護功能。
Segment Protector R2-SP-IC* features the same mechanical design as the R2-SP-N* with added features for superior availability:
The Segment Protector R2-SP-IC* communicates status from the diagnostic-enabled enclosure leakage sensor and surge protector to the Advanced Diagnostic Module. This communication does not interfere with normal process communication and requires no addressing, configuration or bandwidth on the bus.
Segment Protector F2-SP-IC* offers all the intelligent features for fault detection and protection of the R2-SP-IC*. It is installed in our most compact aluminum enclosure (F2-SP-IC*) with:
The Segment Protector R-SP-E12 can supply power to Ex d field devices. The Segment Protector and the instrument can be installed in Zone 1.