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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.

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

First Power Supply