2905744 datasheet(39/49 Pages) PHOENIX

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QUINT4-PS/24DC/24DC/20/SC

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14.3 Description of signaling

14.3.1 Output voltage

Signals whether the output voltage is in the preset range. If

the output voltage of the power supply falls below the set

threshold value, the signal state changes.

Example of use

Indicates whether the connected load is being supplied.

Used to quickly detect a load circuit that is not being

supplied (e.g., in the event of mains failure or short circuit in

the supply line).

14.3.2 Output current

If the output current of the power supply exceeds the set

threshold value, the signal state changes.

Example of use

In the case of system extensions, loads are added. This

increases the utilization of the power supply. Preventive

function monitoring detects critical operating states in good

time. Action can be taken before system downtime occurs.

14.3.3 Output power

If the output power of the power supply exceeds the set

threshold value, the signal state changes.

Example of use

In the case of system extensions, loads are added. This

increases the utilization of the power supply. Preventive

function monitoring detects critical operating states in good

time. Action can be taken before system downtime occurs.

14.3.4 Operating hours

Ifthepresetoperating time ofthe power supplyis exceeded,

the signal state changes.

Example of use

For systems with a very long operating time, such as wind

turbine generators or refineries, maintenance intervals are

planned. You can even schedule the maintenance date

during configuration based on the ambient temperature and

utilization of the power supply.

14.3.5 Early warning of high temperature

Before the power supply protects itself through power

derating in the event of an overtemperature, the signal state

changes.

Example of use

Outdoor control cabinets can reach a high internal

temperaturedependingonthepositionofthesun.Thesame

is true if a control cabinet fan or cooling system fails. In the

event of any form of overtemperature, the power supply

provides a warning by means of this signal, well before the

supply of the loads is in any danger.

Specifications regarding the available output power (see

derating section).

14.3.6 Voltage limitation active

If the circuit inside the device for protecting against surge

voltages is activated at the output, the signal state changes.

Example of use

Normative requirements stipulate that an upper voltage limit

must be observed at the output in the event of an error. It

must therefore be ensured, for example, that safety-related

controllers are not supplied with an output voltage that

exceeds 32 V DC, even in the event of an error. If foreign

bodies (ferrules, screws, etc.) enter the power supply and

generate an error, the signal state changes.

14.3.7 Input voltage OK

Signals whether the input voltage is in the preset range. If

the input voltage of the power supply falls below the set

threshold value, the signal state changes.

Example of use

Indicateswhether thepowersupplyisbeing fedaccordingly.

Used to quickly detect undershooting of the input voltage.

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