DLA71 is a relay made to alternate 2 or 3 pumps in a multiple pump system, it is suitable for mounting on DIN-rail and has an LED indication and power supply switch.
The DLA71 is a monitoring relay designed for pump systems with two or three pumps in parallel. It provides alternating operation, built‑in delay for simultaneous activation, and an automatic rotation function to balance wear. The relay is mounted on a 35.5 mm DIN‑rail and includes LED indicators for power and pump status.
The device operates from 24/48 VAC or 115/230 VAC supplies, supports up to 5 A at 250 VAC (or 24 VDC) contact ratings, and meets IEC safety and EMC standards. Mechanical life exceeds 30 million operations, with an electrical life of 2 million cycles and a maximum operating frequency of 7 200 operations/h.
| Output contacts | 2 × 5 A SPST or 3 × 5 A SPST |
|---|---|
| DIN‑rail housing width | 35.5 mm |
| Supply voltage (AC) | 24/48 VAC, 115/230 VAC |
| Contact rating (resistive load) | 5 A @ 250 VAC |
| Mechanical life | > 30 million operations |
| Electrical life | 2 million operations |
| Operating frequency | < 7200 operations/h |
| Dielectric voltage | 2 kV AC (rms) |
| Impulse withstand voltage | 4 kV (1.2/50 µs) |
| Dimensions (H × W × D) | 35.5 × 81 × 67.2 mm |
| Weight | ≈ 135 g |
| Approvals | UL, CE Marking |
The DLA71 relay alternates two or three pumps in a parallel pump system, providing automatic rotation and built‑in delay to balance wear.
The minimum delay to activate the rescue pump is 10 seconds.
The contacts are rated for 5 A at 250 VAC (and 5 A at 24 VDC).