MISCOM7212GP Series Industrial Gigabit POE Switch
- 4 -
2.1.1. Power Input Terminals
This switch has a 5-ways terminal block on the top panel for the redundant
power supply.
Input voltage range: DC48 ~ 57V
important hint:
Power-on operation: First connect the power cord to the power terminal
of the device according to the definition shown in the figure above, and then
power on;
Power-off operation: first unplug the power plug, then remove the power
cord, please pay attention to the above operation sequence.
2.1.2. Grounding
This switch has a grounding screw that pins one end of the grounding wire
to the terminal and then fixes the grounding screw to the grounding hole of the
casing. The other end of the grounding wire is reliably connected to the earth.
The ground wire section is not less than 2.5mm
2
2.1.3. Alarm Relay
This switch has a 3-ways 3.81mm terminal block for alarm relay on the
front panel.It’s a normally open relay(left side) and a normally closed relay(right
side),the block in the middle is shared used. When the switch works well, the
normally open relay is closed,and the normally closed relay is off.When the
device power off(single power or dual power off),the port link down,or cause
network storm, the normally open relay is off,and the normally closed relay is
closed. Recommended load capacity of the relay switch is 1A (24VDC).
