DC-OK relay contact

This function monitors the output voltage generated by the power supply itself. It is independent of a voltage fed back from a unit connected in parallel to the power supply output.

The contact closes	when the output voltage reaches 90% of the set output voltage.
The contact opens	when the output voltage drops more than 10% below the set output voltage. Short bursts are extended to a signal length of 250 ms. Drops that are shorter than 1 ms are ignored.
The contact closes again	when the output voltage exceeds 90% of the set voltage.
Contact load capacity	Maximum 60 Vdc 0.3 A, 30 Vdc 1 A, 30 Vac 0.5 A, ohmic load
Contact load capacity	Minimum permissible load: 1 mA at 5 Vdc
Insulation voltage	See the table in chapter Dielectric strength

DC-OK relay contact 1: — Behavior of the DC-OK relay contact

	DC-OK function The DC-OK function requires the output voltage to reach the rated (=set) level after power-up in order to function as specified. If this level is not reached, the overload LED lights up and the DC-OK contact opens. The overload LED goes out when the set voltage is reached. This is an important condition to be considered especially if the load is a battery, the power supply is used in parallel or the power supply is used for N+1 redundant systems.