Monitoring Relays
Pump alternating
Type DLA71
• Pump alternating relay for 2 or 3 pumps
• Output: 2 x 5 A SPST relay or 3 x 5 A SPST
• For mounting on DIN-rail in accordance with
DIN/EN 50 022
• 35.5 mm DIN-rail housing
• LED indication for relay and power supply ON
• Galvanically separated power supply
• Built-in delay for the second or third pump in case of
simultaneous activation is required
• Built-in function for automatic rotation of the pumps
Product Description
Ordering Key
DLA 71 T B23 3P
DLA71 is relay made to avoid big inrush current.
alternate 2 or 3 pumps in a
Housing
Function
multiple pump system. In The LED indicates the state Type
case of need (i.e.: overflow) of the alarm and the output Item number
the second, or even the third relay.
pump can be activated
Output
Power supply
together with the first one.
35.5 mm wide housing suit- Number of pumps
In case more than one pump able both for back and front
is required to start at the panel mounting.
same time, the pumps start
10 s after the previous to
Type Selection
Mounting
Output
Function
Supply: 24/48 VAC
Supply: 115/230 VAC
DIN-rail
DIN-rail
2 x SPST
3 x SPST
For two pumps
For three pumps
DLA 71 D B48 2P
DLA 71 T B48 3P
DLA 71 D B23 2P
DLA 71 T B23 3P
Input Specifications
Output Specifications
Contact input
Terminals
Output
DLA71...2P
DLA71...3P
2 x SPST NO relay
3 x SPST NO relay
250 VAC
DLA71...2P (normal mode)
ON/OFF 1 pump
ON/OFF 2 pumps
Rated insulation voltage
C, S1
C, S2
Contact ratings (AgSnO2)
µ
Resistive loads
AC 1 5 A @ 250 VAC
DC 12 5 A @ 24 VDC
DLA71...2P (differential mode)
first pump starts
first pump stops
second pump start
second pump stop
Small inductive loads AC 15 1.5 A @ 250 VAC
DC 13 1.5 A @ 24 VDC
C, S1
C, S3
C, S2
C, S4
Mechanical life
Electrical life
≥ 30 x 106 operations
≥ 105 operations
(at 5 A, 250 V, cos ϕ = 1)
DLA71...3P (normal mode)
ON/OFF 1 pump
ON/OFF 2 pumps
Operating frequency
Dielectric strength
Dielectric voltage
≤ 7200 operations/h
C, S1
C, S2
C, S3
2 kVAC (rms)
ON/OFF 3 pumps
Rated impulse withstand volt. 4 kV (1.2/50 µs)
DLA71...3P (full mode)
ON 1 pump
ON 2 pumps
ON 3 pumps
OFF all pumps
C, S1
C, S2
C, S3
C, S4
Disabled
Enabled
Voltage
Current
> 10 kΩ
< 1 kΩ
< 25 V
< 2 mA
Specifications are subject to change without notice (01.09.06)
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