Structure and functions
3
NK8237 hardware
14
Building Technologies
A6V10403182_a_en
Fire Safety & Security Products
30.09.2014
3
Structure and functions
3.1
NK8237 hardware
The NK8237 is composed of an electronic board installed in a compact and robust
plastic box.
NK8237 gateway unit
3.1.1
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 bicolor)
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.