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LGH1004A Hardened Ethernet Switch Quick Installation Guide
Wiring Grounding
AC motors, electric welding machines, and power devices generate electromagnetic and disturb communications. To prevent
noise, be sure to ground the switch. The following diagram shows how to create a connection.
Extra power
system
Alarm
system
Maximum 1 A current, 24 VDC
Figure 4. Grounding the switch.
Enable the Event Alarm Function
The switch has one dry relay output for port link fails or power fails. Just change the DIP switch to the desired setting and the
new configuration will be activated. You don’t need to reset the system.
On the bottom side of the switch, there is one 6-pin DIP switch for alarm control. Insert the power and port wiring and the DIP
switch for the intended alarm is switched to “ON.” The relay output will form a short circuit if the alarm occurred.
Figure 5. Setting the DIP switch.
Table 1. DIP switch settings for port link or power failure alarm.
Pin Number
Status
Description
P1 to P (Pin 1–5) ON
Enables port link down alarm at this port.
OFF
Disables port link down alarm at this port.
P6
ON
Enables power failure alarm.
OFF
Disables power failure alarm.
