Siemens NK8235

Structure and functions
4
NK823x hardware
26
Building Technologies A6V10062437_a_en
Fire Safety & Security Products 30.06.2013
 Blinking (2 flashes) : trouble with the I
2
C bus to I/O modules.
 Blinking (3 flashes) : not used
 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.
– SW trouble.
– No communication to FS20/FS720 or to the Modbus Master/Client.
– No NK8237 or FS20/FS720 registers reading (Modbus Master watchdog
expired).
 On : critical/hardware fault.
Right Side LED’s
The four LED's on the right side are, from top to bottom:
Name Function
Com1 Status Com1
Com2 Status Com2
Com3 Status Com3
Com4 Status Com4
Red: RX
Green: TX
4.2.2 Internal DIP switches
The internal DIP switches (S101) enable a download session via FTP using a default
IP address.
Internal switch Functions
DIP switch 1 Default mode/network access: If DIP-switch 1 is ON, an FTP connection occurs
by default on the Ethernet at the default IP address 192.168.9.41.
DIP switch 2 Default mode/network access: If DIP-switch 2 is ON, an FTP connection occurs
by default on the Ethernet at the default IP address 192.168.10.41.