Connecting A Backup Battery; Relay Outputs; Current Output - Grundfos Conex DIA-G Instrucciones De Instalación Y Funcionamiento

10.3 Connecting a backup battery

Voltage supply via backup battery:
• Connect + to terminal 19.
• Connect - to terminal 20.
Backup battery monitoring function:
• Connect + to terminal 37.
• Connect - to terminal 38.

10.4 Relay outputs

The connection of the relay outputs
depends on the application and the final
control elements used.
Note
Therefore the connections described
below should only be considered as
guidelines.
With inductive loads (including relays and
contactors), interference suppression is necessary.
If this is not possible, protect the relay contacts using
a suppressor circuit as described below.
• With AC voltage:
Current up to Capacitor C
10 μF, 275 V
60 mA
47 μF, 275 V
70 mA
100 μF, 275 V
150 mA
220 μF, 275 V
1.0 A
• With DC voltage: Connect the free-wheeling
diode in parallel to relay or contactor.
Provide the relay outputs with a
Caution
corresponding backup fuse!
+
DC AC
-
Fig. 9 Suppressor circuit DC/AC
22

10.5 Current output

Caution
The current output can be set to one of the two
standard ranges "0-20 mA" or "4-20 mA", or it can be
freely adjusted.
• Connect the screen to earth (PE) at one end.
Output 1: sensor 1
This current output emits the displayed measured
value as an analog current signal.
Use of current signal for measured values:
• As input signal for another indicator.
1. Connect the + conductor to terminal 39.
2. Connect the - conductor to terminal 40.
Output 2: sensor 2
This current output emits the displayed measured
value as an analog current signal.
Use of current signal for measured values:
• As input signal for another indicator
1. Connect the + conductor to terminal 41.
Resistor R
2. Connect the - conductor to terminal 42.
390 Ω 2 W
22 Ω, 2 W
47 Ω, 2 W
47 Ω, 2 W
R
C
Ensure correct polarity! Maximum load:
500 Ω.