Ethernet Switch User Manual
Manual_hw-ESML3-FL2-D4-Rev1011
Copyright © KBC Networks Ltd.
Page 9 of 18
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2.7
Data Ports
The ESML3-FL2-D4 offers 4 serial ports with physical connectors for RS232 or
RS485, only one of which can be supported on one port at a time. The data terminal
is wired as a 3.81mm space 20 lines phoenix terminal. The connections are as
follows:
Fig 2.2 Serial terminal wiring of ESML3-FL2-D4
2.8
Grounding / Earthing
The ESML3-FL2-D4 has an earth point located on the top panel of the switch. To
achieve the best earth connection, a circular cold-press terminal should be crimped
to one end of the earth wire and attached to the unit with the screw, making sure
that the star washer stays in contact with the body of the switch. The cross-section
of grounding wire should not be less than 2.5mm
2
.
2.9
LED Status
LED
Status
Description
Power
POWER 1
ON
24Vdc power is supplied to POWER 1 input
OFF
No power is supplied to POWER 1 input
POWER 2
ON
24Vdc power is supplied to POWER 2 input
OFF
No power is supplied to POWER 2 input
System Status
RUN 1
(left LED)
ON
Switch is not functioning correctly
FLASH
Switch functioning correctly
OFF
Switch is off
RUN 2
*
(right LED)
ON
No power is supplied to either POWER 1 or POWER 2
OFF
Power being supplied to both power inputs
