American Magnetics 286 Multi-Sensor Liquid Level Instrument (CE-Marked) - Manual (Page 111)

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Appendix
J5A and J5B connectors
The HI level and LO alarm contacts also provide positive indication of a
power-off condition. With a power-off condition, both the HI and LO alarm
contacts will be closed for a given channel, which is a state unique to the
power-off condition.
The following table provides the specifications for the HI and LO alarm
relay contacts (pins 5, 6, 7 and 8):
The instrument provides a maximum voltage across pins 1 and 2 of
connectors J5A and J5B of 5.25 VDC for a connected remote contact in the
open state. With a connected remote contact in the closed state, the contact
current supplied by the Model 286 will not exceed 5.5 mA.
The remote contact sense can be used as a fill inhibit indicator (see
paragraph 4.3.7.3 on page 47). Both remote contact senses can also be used
in the auto-changeover mode to indicate if the storage vessels contain
liquid (see paragraph 4.3.8.3 on page 49).
Max switching VA 10 VA
Max switching voltage 30 VAC or 60 VDC
Max switching current 0.5 A
Max continuous current 1.5 A