DETAILED DESCRIPTION

DLA73

The DLA73 is an electronic relay to alternate 2 pumps in a multiple pump system, without PLC. The device needs only 2 input contacts for all the functions and 1 more for activation of third relay  (i.e.: for alarm signal)
In case of need (i.e.: overflow) the second pump can be activated together with the first one.
In case more than one pump is required to start at the same time, the pumps start 10 s after the previous to avoid big inrush current.
If the system is continuously working with only one pump, after working for 6 hours, DLA73 stops the pump and the second one automatically starts. This rotation is repeated every 6 hours of single and continuative work of a pump.
The LED indicates the state of the alarm and the output relay.

Specifications

• Power supply: 24/48 VAC or 115/230 VAC
• Galvanically separated power supply
• Built-in function for automatic rotation of the pumps
• Built-in delay for the second pump in case of simultaneous activation if required 
• Output: 3 x 5 A SPST relay (2 for the pumps and 1 for alarm)
• LED indication for relay and power supply ON
• Housing 35.5 mm for DIN-rail mounting