TERMBOX‑1212 has two 12 V signal line protectors that can be used with RS‑485, RS-232C, LON, and leased-line modems.
The mains input is protected by FPS111 circuit board.
- 1
- AC power connections
- 2
- AC power overvoltage protector
- 3
- Mounting screws
- 4
- Signal line connections/protectors