Antaira Technologies - Industrial Ethernet Switches
LMP-1802G-M12-10G-SFP-67-110 Series - Hardware Manual - v1.0
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Digital Input (DI)
The digital input is used for monitoring two external events via an external voltage source. When the voltage level on
digital input pins changes from high voltage to low voltage, the DI function will be triggered.
Table 2.7
is shown a detailed
specification of the digital input.
Specification
Description
Level 0 (Low)
-30~8VDC
Will trigger DI function (active trigger states)
Level 1 (High)
10~30VDC
Normal Status (inactive trigger states)
Nominal input voltage
24VDC
Max. input voltage
30VDC
Nominal input current
5mA (typical)
Max. input current
8mA
Table 2.7 - Specification of DI
As described in Relay Contact section, if the fault status (total output power over device's PoE power budget, or any one of
PoE ports over 30 Watts) happens, you have to use DI function to reset the Fault LED, so there are two DI functions this
unit supports for manually reset or reboot the device, which is shown as follows.
1. When the trigger time < 4 seconds, the relay contact will be reset and the Fault LED lights down.
2. When the trigger time > 4 seconds, the Ethernet switch will be rebooted.
2.12 Grounding Note
Grounding and wire routing help limit the effects of noise due to electromagnetic interference (EMI). Run the ground
connection from the ground screw to the grounding surface prior to connecting devices. The grounding screw symbol is
shown below in
Figure 2.6
.
Figure 2.6 - Grounding Screw Symbol
