Siemens NK8237 MP4.81-02 - Structure and Functions; NK8237 Hardware; Front Panel

4
Structure and functions
NK8237 hardware
16
Building Technologies
A6V10854379_a_en
CPS Fire Safety
25.01.2019
6 Structure and functions
6.1 NK8237 hardware
The NK8237 is composed of an electronic board installed in a compact and robust
plastic box.
Note: NK8237 units with build state up to 01 are equipped with the NKM8001-A1
mainboard and NK8237 units with build state 10 or higher are equipped with the
NKM8001-A2 mainboard.
NK8237 gateway unit
6.1.1 Front panel
The front panel houses 9 LEDs.
Left Side LEDs
The five LEDs on the left side are from top to bottom:
Power (green LED)
Power (hardware – controlled).
Vital functions (green LED)
Software vitality:
⚫ Blinking (1 flash) : core software running.
⚫ Blinking (2 flashes) : core software running and logging function active.
Tamper (bi-color LED)
Unit tamper:
⚫ Red means tamper alarm (hardware controlled).
⚫ Green means tamper disabled (from management station).
Download (red LED)
Network diagnostics:
⚫ Off : status OK.
⚫ Blinking (1 flash) : missing identification from NS8xxx.
⚫ Blinking (2 flashes) : not used.
⚫ Blinking (3 flashes) : FTP channel open (default mode; for switch settings see
Internal DIP Switches .
⚫ On : critical/hardware fault.