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 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

	Nature and source of the danger 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.