Grundfos Conex DIA-2, Installation And Operating Instructions Manual

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En
gl
is
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B)
20
Legend of terminals
Control panel enclosure Conex
®
DIA-2
• Conex
®
DIA-2 : for installation in the control panel.
• Sensor interface: for installation near the sensors.
10.2 Power supply connection
1. Control panel enclosure: Plug the plug strip into
the corresponding terminal strip at the rear side
of the device. Ensure correct orientation.
2. Connect the protective earth conductor (PE) to
terminal 5 (wall-mounted enclosure) or terminal
8/1 (control panel enclosure).
3. Connect the neutral conductor (N) (or the -
conductor with 24 V version) to terminal 3
(wall-mounted enclosure) or terminal 8/2 (control
panel enclosure).
4. Connect phase (L1) (or the + conductor with 24 V
version) to terminal 1 (wall-mounted enclosure)
or 8/3 (control panel enclosure).
Switch the device on and off by switching the power
supply on and off accordingly. The device itself is not
equipped with a separate on/off switch.
10.3 Relay outputs
With inductive loads (also 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:
• With DC voltage: Connect the free-wheeling
diode in parallel to relay or contactor.
Fig. 10 Suppressor circuit, DC/AC
Pos. Description
Relays Relay 1 + 2
Alarm
Alarm relay
– N.O. : normally open
– N.C. : normally closed
Pt100 Temperature sensor
H
2
O Water sensor
Stop
Controller stop
(NO or NC selectable)
Outputs Current outputs [mA]
1
Cl
2
(chlorine),
ClO
2
(chlorine dioxide),
O
3
(ozone) or
H
2
O
2
(hydrogen peroxide)
2 pH
3
T/P2: temperature / continuous
controller parameter 2
4
P1: output of continuous controller
parameter 1
Electrodes
Measuring cells, electrodes and
single-rod measuring chains
M Measuring electrode
B/R Reference electrode
G/C Counter electrode
Earth
mV pH electrode
Screen
Note
The connection of the relay outputs
depends on the application and the final
control elements used. Therefore the
connections described below should only
be considered as guidelines.
Current up to Capacitor C Resistor R
60 mA 10 nF, 275 V 390 Ω , 2 W
70 mA 47 nF, 275 V 22 Ω , 2 W
150 mA 100 nF, 275 V 47 Ω , 2 W
1.0 A 220 nF, 275 V 47 Ω , 2 W
Caution
Provide the relay outputs with a
corresponding backup fuse!
TM
03 72
09 281
3
+
-
DC
R
C
AC