Structure And Functions; Nk8237 Hardware; Front Panel - Siemens NK8237 MP4.40 Installation, Function & Configuration, Commissioning

Structure and functions

4 Structure and functions
4.1

NK8237 hardware

4.1.1

Front panel

12
Building Technologies
Fire Safety & Security Products
The NK8237 is composed of an electronic board installed in a compact and robust
plastic box.
Note that 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.
Fig. 3 NK8237 gateway unit
The front panel of the NK8237 houses 9 LED's. The five LED's on the left side are,
from top to bottom:
Front panel LED
Power (LED green)
Vital functions (LED green)
Tamper (LED bicolour)
Download (LED red)
Diagnostics (LED yellow)
Tab.1.LED functions on the front panel, left side
Functions
Power (hardware – controlled)
Software vitality (blinking)
Unit tamper:
Red means tamper alarm (hardware controlled)
–
Green means tamper disabled (from management station)
–
NK823x network diagnostics:
Off = Status OK
–
Blinking (1 flash) = Missing identification from NS8xxx
–
– Blinking (2 flashes) = Not used
Blinking (3 flashes) = Default mode ( switch settings in
–
section 4.1.2 below): FTP channel open
On = Critical/hardware fault
–
NK823x internal interface diagnostics:
– Off = Status OK
– Blinking (fast) = Booting operating system after restart
Blinking (1 flash) = Missing or insufficient license
–
Blinking (2 flashes) = Trouble with the I
–
– Blinking (3 flashes) = n/a
Blinking (4 flashes) = Trouble with the serial/network interface
–
Blinking (5 flashes) = Trouble with DLL or RCLOCK file(s)
–
– Blinking (6 flashes) = Modbus GW trouble:
– On = Critical/hardware fault
048_DMS_NK8237_ICC_MP4.40_A6V10316241_a_en.doc
2
C bus to I/O modules
- SW trouble.
- No communication to FS20/FS720 or
to the Modbus Master/Client.
- No NK8237 or FS20/FS720 registers
reading (Modbus Master watchdog
expired)
06.2011