Digisol DG-IS4508HP User Manual - Page 13
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3.5 Connecting Power Terminal Block
The switch can be powered from two power supplies (input range 12V – 58V). Insert the positive
and negative wires into V+ and V- contacts on the terminal block respectively and tighten the
wire-clamp screws to prevent the wires from being loosened.
Note: The DC power should be connected to a well-fused power supply.
3.6 Alarm Relay and Ground
The alarm relay output contacts are in the middle of the DC terminal block connector as shown in
the figure below.
The alarm relay out is "Normal Open", and it will be closed when detected any predefined failure
such as power failures or Ethernet link failures.
The relay output with current carrying capacity of 0.5A @ 24 VDC
DG-IS4508HP/IS4512HP/IS4514HP Hardware Installation Guide
Second Power Supply
13
First Power Supply