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13. Technical data
13.1 Altitude above sea level
Maximum 1000 m.
13.2 Temperature
Ambient temperature: 0 °C to 40 °C.
13.3 Relative humidity
Maximum relative humidity: 95 %.
14. Electrical data
Supply voltage
See the nameplate of the system.
Backup fuse
See the wiring diagram supplied with the system.
Digital inputs
Open-circuit voltage:
24 VDC
Closed-circuit current:
5 mA, DC
Frequency range:
0-4 Hz
All digital inputs are supplied with SELV voltage
(Safety Extra-Low Voltage).
Analog inputs
Input current and voltage:
Tolerance:
Repetitive accuracy:
Input resistance, current:
Input resistance, voltage, CU 354:
Input resistance, voltage, IO 351:
Supply to sensor:
All analog inputs are supplied with SELV voltage
(Safety Extra-Low Voltage).
Digital outputs (relay outputs)
Maximum contact load: 240 VAC, 2 A
Minimum contact load:
5 VDC, 10 mA
All digital outputs are potential-free relay contacts.
Some outputs have a common C terminal. For further
information, see also the wiring diagram supplied
with the system.
0-20 mA
4-20 mA
0-10 V
± 3.3 % of full scale
± 1 % of full scale
< 250 Ω
50 kΩ ± 10 %
> 50 kΩ ± 10 %
24 V, maximum 50 mA,
short-circuit protected
Inputs for PTC sensor/thermal switch
For PTC sensors according to DIN 44082, thermal switches can
also be connected.
Open-circuit voltage:
12 VDC ± 15 %
Closed-circuit current: 2.6 mA, DC
Inputs for PTC sensors are electrically separated
from the other inputs and outputs of the system.
15. Further product information
Further information about Control DDD and the pumps is
available in Grundfos Product Center at www.grundfos.com.
16. Disposing of the product
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
The crossed-out wheelie bin symbol on a product
means that it must be disposed of separately from
household waste. When a product marked with this
symbol reaches its end of life, take it to a collection
point designated by the local waste disposal
authorities. The separate collection and recycling of such
products will help protect the environment and human health.
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