Relay Outputs; Current Output; Connection Of Sensors - Grundfos Conex DIS-G Instrucciones De Instalación Y Funcionamiento

10.3 Relay outputs

The connection of the relay outputs
depends on the application and the final
Note
control elements used. 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
60 mA 10 nF, 275 V
70 mA 47 nF, 275 V
150 mA 100 nF, 275 V
1.0 A 220 nF, 275 V
• With DC voltage: Connect the free-wheeling
diode in parallel to the relay or contactor.
Provide the relay outputs with a
Caution
corresponding backup fuse!
+
DC AC
-
Fig. 7 Suppressor circuit DC / AC

10.4 Current output

Connection via 2-wire cable with single screen.
Maximum length: 1000 metres.
Ensure correct polarity!
Caution
Maximum load: 400 Ω
The current output can be set to one of the two
standard ranges "0-20 mA" or "4-20 mA".
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 20.
2. Connect the - conductor to terminal 21.
3. Connect the screen to the protective earth
conductor (PE).
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 23.
2. Connect the - conductor to terminal 24.
3. Connect screen to the protective earth conductor
(PE).

10.5 Connection of sensors

Caution
Resistor R
390 Ω, 2 W
10.5.1 Amperometric sensors
22 Ω, 2 W
Connection via 2-wire cable 0.5 mm
screen. Maximum length (maximum distance
47 Ω, 2 W
between the sensor disc and gas warning controller):
47 Ω, 2 W
100 metres.
Cables for amperometric gas sensors
Description
Connection cable for amperometric
gas sensors, 10 metres
Connection cable for amperometric
gas sensors, 20 metres
Connection cable for amperometric
R
gas sensors, 50 metres
The wire colours refer to Grundfos cable.
C
Sensor 1:
• Connect the brown wire (+) to terminal 26.
• Connect the white wire (-) to terminal 27.
• Connect the screen to PE.
Sensor 2:
• Connect the brown wire (+) to terminal 30.
• Connect the white wire (-) to terminal 29.
• Connect the screen to PE.
Connect the screening to screen ground
on one side only!
2
with single
Product
number
96725670
(321-130/10)
96725672
(321-130/20)
96725673
(321-130/50)
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