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4
Structure and functions
NK8237 hardware
22
Building Technologies
A6V10854379_a_en
CPS Fire Safety
30.11.2017
1
2
PW
MAINS
AC/DC
LOW BATT
BATT FUSE
DF8090 front panel
Item
Description
1
LEDs.
2
I
2
C connector to I/O modules.
See Figure
NK8237 power supply (see NK8237 hardware installation [➙ 24]) for
the power supply connections.
6.1.7
Ethernet interfaces
The NK8237 main board is equipped with two Ethernet interfaces. The two RJ-45
connectors also include 2 LEDs (yellow and green) reporting the LAN status as
follows:
Yellow LED: if on, a 100 Mbps link is active.
Green LED: flashing when data is received or transmitted.
2
Back
1
Ethernet connectors
Item
Description
1
Ethernet 1
2
Ethernet 2