Siemens NK8223

Structure and functions
NK823x hardware
4
25
Building Technologies
A6V10062437_a_en
Fire Safety & Security Products 30.06.2013
NK823x Ethernet port unit (NK8235 in this example)
4.2.1 Front panel
The front panel houses 9 LED’s.
Left Side LED’s
The five LED’s on the left side are, from top to bottom:
Power (LED green)
Power (hardware – controlled).
Vital functions (LED green)
Software vitality:
 Blinking (1 flash) : core software running.
 Blinking (2 flash) : core software running and logging function active.
Tamper (LED bicolour)
Unit tamper:
 Red means tamper alarm (hardware controlled).
 Green means tamper disabled (from management station).
Download (LED red)
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.
Diagnostics (LED yellow)
Internal interface diagnostics:
 Off : status OK.
 Blinking (fast) : booting operating system after restart.
 Blinking (1 flash) : missing or insufficient license.