DLA73TB232P Carlo Gavazzi

DLA73TB232P, Monitoring Relays Pump alternating Type DLA73, DLA73TB232P, DLA73 is relay made to alternate 2 pumps in a multiple pump system. In case of need (i.e.: overflow) the second pump can be activated together with the first one. The unit actives the third output relay (i.e.: for alarm signal) by closing one indipendent input contact. 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. The LED indicates the state of the alarm and the output relay. 35.5 mm wide housing suitable both for back and front panel mounting., DLA73TB232P, DLA73 is made for pumping systems where 2 pumps are in parallel. It lets the pumps work alternatively, allowing more pumps to work togheter in case of need. Example 1 (Emptying a basin, normal mode) As soon as the liquid reaches switch S1 one pump starts. As soon as S1 switches back the pump stops. When switch S1 is activated again the other pump starts allowing uniform wear and tear of all the pumps. If switch S2 is activated both pumps start (2 pumps running at the same time). When S2 switches back the pump running since most time stops. As soon as switch S3 (used as high level control in this example) is activated, the 3th output relay (15-38) reacts immediately to send an alarm signal (i.e.: by a siren). As soon as S3 switches back, the alarm stops. Example 2 (Emptying a basin, full mode) As soon as the liquid reaches switch S1 one pump starts. When it drops below switch S4 it stops. If switch S1 is triggered again the other pump starts. If switch S2 is activated both pumps start (rescue function). As soon as switch S3 (used as high level control in this example) is activated, the 3th output relay (15-38) reacts immediately to send an alarm signal (i.e.: by a siren). As soon as S3 switches back, the alarm stops. The only switch to stop all the pumps active at a certain time is S4. Note 1 As soon as DLA73 is supplied and then S1 or S2 is switched, the device activates at random one of the two pumps. Note 2 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. Note 3 In case the task is to fill a basin, all the switches are reversed in the basin itself (except for switch S3).