Power Supply Connection; Relay Outputs - Grundfos Conex DIA-2Q Manual De Instrucciones

Legend of terminals
Pos. Description
Relays Relay 1 + 2
Alarm relay
– N.O.: normally open
Alarm
– N.C.: normally closed
Pt100 Temperature sensor
H O Water sensor
2
Controller stop
Stop
(NO or NC selectable)
Outputs Current outputs [mA]
Cl (chlorine), ClO
2
dioxide), O
1
(hydrogen peroxide) or PAA
(peracetic acid)
2 pH, mV (redox)
T/P2: temperature/continuous
3
controller parameter 2
P1: output of continuous controller
4
parameter 1
Inputs External inputs [mA]
Measuring cells, electrodes and
Electrodes
single-rod measuring chains
M Measuring electrode
B/R Reference electrode
G/C Counter electrode
Earth
mV Redox electrode
screen
Control panel enclosure Conex
®
• Conex DIA-2Q: for installation in the control
panel.
• Sensor interface: for installation near the
sensors.
Use the following cable to connect the sensor
®
interface to the Conex DIA-2Q: shielded cable, 4 x
2
0.5 mm .
20
(chlorine
2
(ozone), H O
3 2 2
®
DIA-2Q

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

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 (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:
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 relay or contactor.
Provide the relay outputs with a
Caution
corresponding backup fuse!
+
DC AC
-
Fig. 10 Suppressor circuit, DC/AC
Resistor R
390 Ω, 2 W
22 Ω, 2 W
47 Ω, 2 W
47 Ω, 2 W
R
C