Moxa DA-681-I-DP-XPE [21/52] Attention

DA-681 Series Embedded Computer Hardware Installation

2-9

10 PWR2 Neutral / DC – PWR2 Neutral / DC – is connected to the

negative (–) terminal if the power source is DC, or

to the Neutral terminal if the power source is AC.

For AC Power Input

PWR1 Line/ DC + should be connected to AC (Line).

PWR1 Neutral / DC – should be connected to AC (Neutral).

Surge Ground is connected to the Chassis Ground via a braided cable or other appropriate grounding wire.

Surge Ground is used as the ground conductor for all surge and transient suppression circuitry internal to the

PT-7324 unit.

Chassis Ground should be connected to the AC Ground terminal.

ATTENTION

Equipment must be installed according to the applicable country wiring codes.

Surge Ground MUST be disconnected from the Chassis Ground during HIPOT (dielectric strength) testing.

All line

-to-ground transient energy is shunted to the Surge Ground terminal

. In cases where users require the

inputs to be isolated from the ground, remove the ground braid between Surge and Chassis Ground. Note that

all line

-to-ground transient protection circuitry will be disabled.

For DC Power Input

The DA-681 series low voltage DC power supply features reverse polarity protection and dual independent

inputs. The dual power inputs allow the connection of two DC sources with the same nominal voltage to provide

redundant power supply inputs. The DC source must be connected to the DC inputs according to the polarity

markings on the unit.

ATTENTION

Equipment must be installed according to the applicable country wiring codes.

Surge Ground should be connected to Chassis Ground via a braided cable or

other appropriate ground wire.

Chassis Ground must be connected to the protection earth.

All line

-to-

ground transient energy is shunted to the Surge Ground terminal. In cases where users require the

DC inputs to be isolated from ground, remove the ground braid between Surge and Chassis Ground. Note that

all line

-to-ground transient protection circuitry will be disabled.

HIPOT (Dielectric Strength) Testing

Before performing the HIPOT test, you MUST have the jumpers removed and the braided ground cable

disconnected. This is required to prevent the transient/surge suppression circuitry, which is connected to Surge

Ground from being activated during the HIPOT test.